STOCK PURCHASE AGREEMENT



         THIS STOCK PURCHASE AGREEMENT  ("Agreement") is made as of September 7,
1997  by  and  among  Cylink   Corporation,   a  California   corporation   (the
"Purchaser"),  Algorithmic  Research Ltd., a limited liability company organized
and  existing  under the laws of the State of Israel (the  "Company"),  and A.R.
Data Security Ltd., a limited liability company organized and existing under the
laws of the State of Israel (the "Seller").


                                    RECITALS


A. The Seller and Algart Holdings Ltd., a limited  liability  company  organized
and existing under the laws of the State of Israel and a wholly owned subsidiary
of the Seller ("Holdings"), are the sole shareholders of the Company.


B. The Seller  desires to sell and the Purchaser  desires to purchase (i) all of
the issued and  outstanding  shares of the Company that are owned by the Seller,
and (ii) all of the issued and  outstanding  shares of Holdings,  in  accordance
with the  terms  and  conditions  set  forth in this  Agreement,  so that,  upon
consummation  of the  transactions  herein  contemplated,  the  Purchaser  shall
directly, or indirectly through Holdings,  own all of the issued and outstanding
shares of the Company.



                                    AGREEMENT

         In consideration of the agreements,  provisions and covenants set forth
below, the Purchaser, the Company and the Seller hereby agree as follows:

                                   ARTICLE I

                                PURCHASE AND SALE


     1.1.  Purchase and Sale of Stock.  Subject to the terms and  conditions set
forth below,  on the Closing Date (as defined  below),  the Seller shall sell to
the  Purchaser,  and the Purchaser  shall  purchase from the Seller:  (a) 81,749
ordinary shares of the Company,  NIS 0.10 nominal value per share,  representing
all of the  ordinary  shares of the Company  that are owned by the Seller  (said
81,749  ordinary  shares  of  the  Company  being  referred  to  herein  as  the
"Transferred Company Shares"),  and (b) 81,749 ordinary shares of Holdings,  NIS
0.10  nominal  value per share,  representing  all of the  outstanding  ordinary
shares of Holdings (the "Holdings Shares").


     1.2. Purchase Price.


          (a) The  aggregate  consideration  payable  by the  Purchaser  for the
Transferred  Company  Shares and the Holdings  Shares shall  consist of (i) U.S.
$40,686,972 in cash, and (ii) 2,593,169 newly issued shares of the common stock,
$.01 par value per share, of the Purchaser

                                       1


(the  "Purchaser  Common  Stock"),  as adjusted as appropriate for stock splits,
stock dividends and other changes to Purchaser  Common Stock effected during the
period from the date hereof through the Closing Date.

          (b) Any transfer taxes,  stamp duties or other similar taxes or duties
incurred  by the  Seller,  Holdings  or the  Purchaser  in  connection  with the
transfer  of the  Transferred  Company  Shares  or the  Holdings  Shares  to the
Purchaser  shall be borne  and paid one half by the  Seller  and one half by the
Purchaser.


     1.3.     Exemption from Registration and Qualification.

          (a) The shares of Purchaser  Common  Stock to be issued in  connection
with this Agreement will be exempt from  registration  under Regulation S of the
Securities  Act of 1933,  as amended  (the  "Securities  Act"),  and exempt from
qualification under the California Corporations Code.


          (b) Certificates  representing  those shares of Purchaser Common Stock
to be  issued  to the  Seller  pursuant  to this  Agreement  will  bear  legends
describing certain of the applicable  restrictions on transferability  set forth
in Regulation S of the  Securities  Act and related  stop-transfer  instructions
will be placed on such shares of Purchaser Common Stock by Purchaser or its duly
appointed   transfer  agent  and  registrar.   The  Purchaser  agrees  that  the
restrictive  Regulation  S legend and  stop-transfer  instructions  referred  to
herein will be removed upon the request of the Seller or the  respective  Parent
Shareholders (as defined below) at the end of the applicable  restricted  period
as set forth in Regulation S (which is forty (40) days from the Closing Date).

     1.4.     Closing.

          (a) Unless  this  Agreement  shall  theretofore  have been  terminated
pursuant  to the  provisions  of  Article  X  hereof,  subject  to the terms and
conditions set forth herein,  the closing of the  transactions  contemplated  by
this Agreement (the "Closing")  shall take place in Tel Aviv,  Israel,  at 12:00
p.m.  local time on September  8, 1997 or at such other time,  date and place as
the parties may mutually  agree in writing (the date on which the Closing  takes
place being referred to herein as the "Closing Date").

          (b) At the Closing:  (i) the Seller shall deliver to the Purchaser the
certificates  (if any)  representing  the  Transferred  Company  Shares  and the
Holdings  Shares,  properly  endorsed in favor of the  Purchaser for transfer or
accompanied by a duly executed share transfer deed; and (ii) the Purchaser shall
(A) pay to the Seller the cash amount referred to in Section  1.2(a)(i)  hereof,
by wire transfer in immediately available (U.S. dollar) funds, to a bank account
designated  by the  Seller,  (B) issue and  deliver to the Seller a  certificate
representing  1,320,869  shares of Purchaser  Common Stock, and (C) issue in the
name of and deliver to Hambrecht & Quist LLC (the "Escrow  Agent") a certificate
representing  1,272,300 shares of Purchaser Common Stock (the "Escrow  Shares"),
to be held in accordance  with that certain Escrow  Agreement to be entered into
at the  Closing as  contemplated  by Sections  7.5 and 8.4 hereof  (the  "Escrow
Agreement").  In  addition,  all  other  actions  shall be taken  and all  other
documents shall be delivered that are necessary to consummate

                                       2


the  transactions  contemplated  by this Agreement  (other than such actions and
documents  as are to be taken or  delivered  at another  date,  as  specifically
provided in this Agreement).

                                       3



                                   ARTICLE II


                  REPRESENTATIONS AND WARRANTIES OF THE SELLER

          The Seller hereby represents and warrants to the Purchaser,  except as
otherwise set forth in the Disclosure  Schedule being furnished by the Seller to
the Purchaser  simultaneously  with the execution and delivery of this Agreement
(the "Company  Schedule"),  or as disclosed or otherwise described in any of the
documents  listed or set forth in the Company  Schedule  or this  Article II, as
follows:

     2.1.  Title to  Ordinary  Shares.  The Seller is the record and  beneficial
owner of the Transferred  Company Shares and the Holdings Shares, and the Seller
holds title to the  Transferred  Company Shares and the Holdings Shares free and
clear  of  all  liens,  pledges,  charges,  encumbrances,   security  interests,
restrictive    agreements   or   assessments   (other   than   restrictions   on
transferability  generally  imposed on securities  under  applicable  securities
laws).

     2.2.  Organization  of the  Company and  Holdings.  Each of the Company and
Holdings is a limited  liability  private  company  duly  organized  and validly
existing  under the laws of the State of Israel and has full power and authority
to carry on its business as now  conducted,  and to own its assets.  Each of the
Company and Holdings is duly  qualified  to do business and is in good  standing
(with  respect  to   jurisdictions   which   recognize   such  concept)  in  the
jurisdictions set forth in Schedule 2.2 of the Company  Schedule,  which are the
only  jurisdictions  in which the  Company or  Holdings,  as the case may be, is
required  to be  qualified  in  order  to  carry  on its  business,  and is duly
authorized,  and licensed under all laws,  regulations,  ordinances or orders of
public authorities,  or otherwise, to carry on its business in the places and in
the manner presently  conducted,  except for  qualifications,  authorizations or
licenses for which the failure to obtain, if required, would not have a Material
Adverse  Effect on the Company.  Each of the Company and Holdings has heretofore
made  available to the Purchaser  true and complete  copies of its Memorandum of
Association  and its Articles of  Association  registered  with the Registrar of
Companies,  as in effect on the date  hereof.  The  minute  books of each of the
Company and Holdings contain  substantially  accurate records of all resolutions
adopted  and  other  actions  taken by the  Company's  Board of  Directors,  all
committees of its Board of Directors,  and its shareholders from the date of its
incorporation to the date of this Agreement.

     2.3.  Nonviolation.  The  consummation by the Seller and the Company of the
stock sale  contemplated  by  this  Agreement  will  not (a) violate or conflict
with the  Memorandum  of  Association  or  Articles of  Association,  or similar
instrument,  of the Company or any Subsidiary (as defined below),  (b) except as
set forth in this Agreement,  require the Seller,  the Company or any Subsidiary
to  obtain  the  consent,  approval  or  authorization  of any  governmental  or
quasi-governmental  person  or entity  prior to the  Closing,  except  where the
failure to obtain  such  consent,  approval  or  authorization  would not have a
Material Adverse Effect on the Company, or (c) give rise to a right to terminate
by the other party thereto or result in a breach of the terms or conditions  of,
or  constitute  a default  under,  or  violate,  as the case may be,  any Listed
Agreement (as defined below), except for any such termination,  breach,  default
or violation which would not have a Material Adverse Effect on the Company.

                                       4



     2.4. Authority for Agreement.  All corporate and other proceedings required
to be taken by or on behalf of the  Company  and the  Seller  to  authorize  the
Company and the Seller to enter into and carry out this Agreement have been duly
and properly  taken.  This Agreement has been duly executed and delivered by the
Company and the Seller and is valid and binding upon the Company and the Seller,
subject as to  enforceability,  to bankruptcy,  insolvency,  reorganization  and
other laws of general  applicability  relating to or affecting creditors' rights
and to general principles of equity.

     2.5.  Capitalization.  The  authorized  capital of the Company  consists of
200,000  ordinary  shares,  NIS .010 nominal  value per share,  of which 120,519
shares are issued and outstanding.  All of such issued and outstanding  ordinary
shares of the Company  have been  legally and validly  issued and are fully paid
and nonassessable.  Of such 120,519 ordinary shares, the Seller and Holdings own
81,749 and 38,770 shares, respectively, and there is no other shareholder of the
Company.


     2.6. Options,  Warrants,  Etc. There are no outstanding options,  warrants,
rights,  calls,  commitments or agreements calling for the issuance or transfer,
sale or disposition  by the Company or any  Subsidiary of any shares,  issued or
unissued,  of the  capital  stock of the  Company or any  Subsidiary,  or of any
securities convertible or exchangeable,  actually or contingently, into any such
capital stock, to which the Company or any Subsidiary is a party or by which the
Company or any Subsidiary is bound.


     2.7. Officers and Directors.  Schedule 2.7 of the Company Schedule contains
a complete and correct list of the names and home  addresses of all officers and
directors of the Company, Holdings and each of the Subsidiaries.

     2.8. Subsidiaries. Schedule 2.8 of the Company Schedule provides a complete
list  of all of  the  subsidiaries  of the  Company  (the  "Subsidiaries"),  the
respective  jurisdictions of their  incorporation and the percentage and numbers
of their outstanding shares owned by the Company,  or any other person,  firm or
corporation.  For  purposes  of this  Agreement,  any  corporation  of which the
Company,  directly or indirectly,  through other corporations or otherwise, owns
50% or more of the outstanding capital stock shall be deemed to be a Subsidiary.
Each of the  Subsidiaries is qualified to do business in the  jurisdictions  set
forth in Schedule 2.8 of the Company  Schedule which are the only  jurisdictions
in which each such  Subsidiary  is required to be qualified in order to carry on
its business, and is duly authorized,  and licensed under all laws, regulations,
ordinances  or orders  of  public  authorities,  or  otherwise,  to carry on its
business  in the  places  and in the  manner  presently  conducted,  except  for
authorizations,  qualifications  or licenses for which the failure to obtain, if
required,  would  not  have  a  Material  Adverse  Effect  on the  Company.  The
outstanding  shares of capital  stock of each of the  Subsidiaries  are  validly
issued,  fully paid and  non-assessable,  and all of such outstanding  shares of
each of the  Subsidiaries  are owned by the  Company or another  Subsidiary  (or
their nominees) free of any claims, liens, charges or encumbrances of any nature
whatsoever (other than any claims,  liens, charges or encumbrances imposed under
applicable  securities  laws).  Each of the  Subsidiaries  is duly organized and
validly existing in good standing (with respect to jurisdictions which recognize
such concept) under the

                                        5




laws of the  jurisdiction of its  organization and has the power to carry on its
business as now conducted and to own its assets.  The Company has made available
to the Purchaser true and complete  copies of the  Certificate of  Incorporation
(or similar  instrument) and By-Laws (or similar instrument) of each Subsidiary,
as in effect on the date  hereof.  The minute books of each  Subsidiary  contain
substantially  accurate  records of all  resolutions  adopted and other  actions
taken by its Board of  Directors  and its  shareholders  between the time of its
incorporation  and the  date of this  Agreement.  Neither  the  Company  nor any
Subsidiary has any  investments in any  corporation or other entity,  except for
short-term  investments in certificates of deposit,  and other deposits and debt
obligations with a maturity of not more than 180 days.

     2.9. Grants, Incentives and Subsidies. Schedule 2.9 of the Company Schedule
provides a complete list of all material  grants,  incentives and subsidies from
the Government of the State of Israel or any agency thereof or any  quasi-public
agency made  specifically  to the Company,  any  Subsidiary  or  Holdings,  with
respect to which the Company, any Subsidiary or Holdings has material continuing
obligations  ("Grants") ,  including,  without  limitation,  (i) Grants from the
Investment  Center  of the  Ministry  of  Industry  and Trade  (the  "Investment
Center"),  (ii) Grants from the office of the Chief Scientist of the Ministry of
Industry  and Trade (the "Chief  Scientist")  and (iii) Grants from the Fund for
Encouragement of Export. The Company is in compliance, in all material respects,
with the terms and  conditions  of the  Grants  and has duly  fulfilled,  in all
material  respects,  all the  undertakings  relating  thereto and all conditions
imposed  by  law  or  regulation  with  respect  thereto,   including,   without
limitation, Section A of the Law for The Encouragement of Industry, Research and
Development,  except  where the failure to be in  compliance  or to fulfill such
undertakings  or  conditions  would not have a  Material  Adverse  Effect on the
Company.  To the  knowledge  of the Company,  no event has occurred  which would
reasonably be expected to lead to the annulment or material limitation of any of
the Grants.

     2.10. Financial Statements.  The audited consolidated  financial statements
of the Seller and its consolidated subsidiaries for each of the years in the two
year period ended  December 31, 1996,  together  with the notes  thereto and the
reports  and  opinions   thereon  of  Kost,   Levary  and  Forer  (the  "Audited
Consolidated  Financial  Statements"),  and the unaudited consolidated financial
statements of the Seller and its  consolidated  subsidiaries  for the six months
ended June 30, 1997 and the notes thereto (the "Unaudited Consolidated Financial
Statements"),  all of which have  previously  been  delivered to the  Purchaser,
fairly  present  the  consolidated  financial  position  of the  Seller  and its
consolidated   subsidiaries,   as  of  the  respective  dates  thereof  and  the
consolidated  results of their  operations for the periods  indicated,  and were
prepared in conformity  with Israel  generally  accepted  accounting  principles
consistently   applied   throughout  the  periods   covered  thereby  except  as
specifically indicated therein (subject, in the case of unaudited statements, to
normal  recurring  audit  adjustments not material in scope or amount and except
that the  footnotes  contained in the unaudited  statements  may not satisfy the
requirements  applicable to the preparation of footnotes under Israel  generally
accepted accounting  principles).(The  Audited Consolidated Financial Statements
and the Unaudited

                                       6


Consolidated Financial Statements are referred to collectively as the "Financial
Statements.") As of June 30, 1997, except for the Transferred Company Shares and
the  Holdings  Shares,  the  Seller  had no  assets of the type  required  to be
reflected in the assets column of an  unconsolidated  balance sheet  prepared in
accordance with Israel generally accepted accounting principles.

     2.11.  Actions  Since  June  30,  1997.  Except  (a) as  reflected  in,  or
contemplated  by, the  Financial  Statements  or (b) as otherwise  expressly set
forth in or  contemplated  by this Agreement or in the Exhibits hereto or in the
Company  Schedule  since  June 30, 1997,  neither the Company nor any Subsidiary
has: (i) issued or sold, or agreed to issue or sell, or purchased,  or agreed to
purchase,  any of its equity shares or securities  convertible  or  exchangeable
into such equity shares, or any options,  warrants,  rights or calls to purchase
such equity shares,  or other corporate  securities;  (ii) incurred any material
obligation  or  material  liability,  absolute  or  contingent,  of the type and
magnitude  required to be reflected in the liabilities  column of a consolidated
balance  sheet of the Company  prepared  in  accordance  with  Israel  generally
accepted  accounting  principles  except in the  ordinary  and  usual  course of
business;  (iii) discharged or satisfied any lien or encumbrance,  except in the
ordinary and usual course of business,  or paid or satisfied any liability other
than liabilities as at June 30, 1997, except in the ordinary and usual course of
business; (iv) entered into, or modified in any material respect, any employment
or consulting  agreement  (other than its agreement with Hambrecht & Quist LLC),
or made any wage or salary  increases  or granted any bonuses to its  employees,
except those made or granted in the  ordinary and usual course of business;  (v)
mortgaged, pledged or subjected to lien or other encumbrance ("Encumbrance") any
of its material properties or assets (other than (w) Encumbrances  arising under
or  relating  to any  license  agreement  to  which  the  Company  or any of the
Subsidiaries  is a party or by which the Company or any of its  Subsidiaries  is
bound, (x) liens for current taxes or other  governmental  charges or levies not
yet due, or for taxes or other governmental charges or levies being protested in
good faith,  (y) Encumbrances  arising from municipal and zoning  ordinances and
easements for public utilities,  and (z) such  imperfections in the title to the
assets and properties of the Company and its Subsidiaries and  Encumbrances,  if
any, as do not materially  detract from the value, or materially  interfere with
the  present or  continued  use,  of such  assets or  properties,  or  otherwise
materially impair the business or operations of the Company and its Subsidiaries
(Encumbrances  of the type referred to in clauses "(w)," "(x)," "(y)," and "(z)"
of this clause  "(v)" being  referred to herein as  "Permitted  Encumbrances"));
(vi) sold,  assigned or  transferred  any of its material  properties or assets,
except in the  ordinary and usual  course of  business;  (vii)  entered into any
material  transaction  not in the ordinary and usual course of business;  (viii)
irrevocably  waived any rights of substantial  value, or cancelled,  modified or
irrevocably waived any debts held by the Company or such Subsidiary in excess of
U.S.  $25,000 in the aggregate;  (ix) made or incurred  capital  expenditures in
excess of an aggregate of U.S.  $200,000 (the Company and all Subsidiaries to be
taken  as a whole  for  this  purpose);  (x)  declared,  paid or set  aside  any
dividends or other distributions or payments on its equity shares; (xi) made any
loans or advances to any person or assumed,  guaranteed,  endorsed or  otherwise
became  responsible  for the  obligations  of any  person,  except for loans and
advances to  employees  and to  unaffiliated  third  parties in the ordinary and
usual  course  of   business;   (xii)   effected   any  merger,   consolidation,
recapitalization,  stock split, stock dividend,  reorganization or other similar
transaction affecting the equity shares of the Company;  (xiii) made any illegal
payments to  governmental  or  quasi-governmental  officials;  or (xiv) made any
payments  that  have not been  properly  reflected  in the  Company's  books and
records to customers  for the sharing of fees or to  customers or suppliers  for
rebating of charges, or engaged

                                       7


in other  reciprocal  practices  that have not been  properly  reflected  in the
Company's books and records.

     2.12. Liabilities Since June 30, 1997. There are no material liabilities or
obligations of the Company or any Subsidiary of the type and magnitude  required
to be disclosed in the liabilities column of a consolidated balance sheet of the
Company and its  consolidated  Subsidiaries  prepared in accordance  with Israel
generally accepted accounting principles,  whether accrued, absolute, contingent
or  otherwise,  and whether due or to become due,  which arose or, in accordance
with Israel generally accepted accounting principles,  were accrued or should be
accrued with respect to any period  beginning  after June 30, 1997 and ending on
the date of this  Agreement  other than (i) those  incurred in the  ordinary and
usual course of the business of the Company and its Subsidiaries, which have not
had in the  aggregate  a  Material  Adverse  Effect on the  Company,  (ii) those
intercompany  liabilities which are properly eliminated in consolidation,  (iii)
those expressly disclosed in any Exhibit hereto or in the Company Schedule, (iv)
those reasonably incurred in connection with this Agreement  including,  without
limitation,  any indebtedness incurred to pay any costs and expenses arising out
of the transactions  contemplated by this Agreement,  (v) those discharged prior
to the date of this  Agreement,  and (vi)  those  covered by  insurance  and not
otherwise having a Material Adverse Effect on the Company.

     2.13. Absence of Undisclosed  Liabilities.  As of June 30, 1997, there were
no liabilities or obligations of the Company or its consolidated subsidiaries of
the type and magnitude  required to be disclosed in the liabilities  column of a
consolidated  balance  sheet of the  Company and its  consolidated  Subsidiaries
prepared in accordance  with Israel  generally  accepted  accounting  principles
(whether  accrued,  absolute,  contingent  or  otherwise,  and whether due or to
become due),  which, in accordance  with Israel  generally  accepted  accounting
principles,  should have been accrued as of June 30, 1997,  other than (i) those
disclosed, or reflected as a liability or obligation, or reserved against on the
Unaudited Consolidated Financial Statements, (ii) those intercompany liabilities
or  obligations  between  the Company and its  Subsidiaries  which are  properly
eliminated  in  consolidation,  (iii) those  expressly  disclosed in any Exhibit
hereto or in the Company Schedule, and (iv) those fully covered by insurance and
not otherwise having a Material Adverse Effect on the Company.

     2.14.  Litigation.  There  are no  actions,  suits,  legal  proceedings  or
governmental or quasi-governmental investigations pending against the Company or
any Subsidiary before any court or governmental  agency or before any arbitrator
of any kind, or any order,  injunction or decree outstanding against the Company
or any  Subsidiary  and, to the  knowledge of the  Company,  no person has since
January 1, 1996 threatened orally (to any officer or director of the Company) or
in writing to commence any action,  suit or legal proceeding against the Company
or any Subsidiary or against or relating to their property,  assets or business,
that in any such case would  reasonably  be expected to have a Material  Adverse
Effect on the Company. Neither the Company nor any Subsidiary is in violation of
any applicable law, regulation,  ordinance, order, injunction,  decree, award or
other  requirement of any  governmental or  quasi-governmental  body,  court, or
arbitrator  relating  to its  property,  assets,  or  business,  except  for any
violation that would not have a Material Adverse Effect on the Company.

                                       8


     2.15.  Permits.   The  Company  and  its  Subsidiaries  have  all  material
governmental permits, licenses,  orders, approvals,  franchises and other rights
and privileges  necessary  (including,  without  limitation,  approvals from the
Ministry of Defense and any other relevant  governmental  agency relating to the
development,  sale and export of  cryptography  technology) in order for them to
carry on their business as conducted as of the date hereof  (including,  without
limitation,  to manufacture,  sell and distribute any Material  Company Products
that are currently being  manufactured by the Company and its  Subsidiaries) and
to the  knowledge  of the  Company,  there are no  material  impediments  to the
obtaining of any required governmental  permits,  licenses,  orders,  approvals,
franchises  and other  rights and  privileges  as to the  development,  sale and
export of any Material Company Products under development,  except in each case,
such permits,  licenses,  orders,  approvals,  franchises,  and other rights and
privileges  of which  the  failure  to  obtain,  if  required,  would not have a
Material  Adverse Effect on the Company.  Schedule 2.15 of the Company  Schedule
sets forth a list of all such material permits,  licenses,  orders and approvals
from all  Israeli  and other  governmental  and  regulatory  bodies  held by the
Company and its Subsidiaries.

     2.16. Ownership of Assets. The Company and its Subsidiaries have good title
to all of their respective owned assets and properties,  tangible and intangible
(including  all  assets  reflected  in  the  Unaudited   Consolidated  Financial
Statements,  except those  disposed of in the ordinary  course of business since
June 30, 1997), and good title to their leasehold estates, in each case free and
clear of all Encumbrances except for Permitted Encumbrances. Except as set forth
in the Financial  Statements,  none of the material  properties or assets of the
Company  and its  Subsidiaries  the value of which is  reflected  in the  assets
column of the balance  sheet  included in the Unaudited  Consolidated  Financial
Statements, is held by the Company or any Subsidiary as lessee or subject to any
lease or as conditional  vendee under  conditional sale or other title retention
agreement or as optionee under any option to purchase.


     2.17. Intellectual Property.


          (a)  Schedule  2.17(a)-1  of the Company  Schedule  lists each patent,
patent application,  registered trademark,  trade name, registered service mark,
copyright and copyright  application  that (i) is owned by the Company or any of
its  Subsidiaries  as  of  the  date  of  this  Agreement,   and  (ii)  provides
intellectual  property  protection  for any  material  component of any Material
Company Product (or for any material component,  module,  feature or subassembly
thereof) or is otherwise  material to the conduct of the business of the Company
and its  Subsidiaries  (taken  as a  whole)  as of the  date of this  Agreement.
Schedule  2.17(a)-2 of the Company Schedule  identifies each patent,  trademark,
service mark and  copyright  that (A) is being  licensed by a third party to the
Company  or any of its  Subsidiaries  as of the  date  of  this  Agreement,  (B)
provides  intellectual  property  protection for any technology or invention for
which the Company  cannot obtain the  functional  equivalent  from more than one
source,  and (C)  provides  intellectual  property  protection  for any material
component  of any  Material  Company  Product  (or for any  material  component,
module,  feature or  subassembly  thereof).  Schedule  2.17(a)-2  of the Company
Schedule  further sets forth any such  license that  requires the Company or its
Subsidiaries  to pay any material  royalties  or any material  fixed or variable
fees or  consideration  for such  licensing.  Schedule  2.17(a)-3 of the Company
Schedule identifies each software system, software application,  software module
or

                                       9



software  program,  hardware  component,  system or product or other  component,
card,  subassembly  or part  that:  (1) is a  material  component  of a Material
Company  Product,  and (2) has been  designed  or  developed  for the Company by
employees of or consultants to the Company prior to the date of this  Agreement.
For the purposes of this Agreement,  "Company Intellectual  Property" shall mean
both: (i) the items listed in Schedule  2.17(a)-1 and Schedule  2.17(a)-2 of the
Company  Schedule (which,  for purposes of this  definition,  shall be deemed to
include any item that should have been listed on Schedule  2.17(a)-1 or Schedule
2.17(a)-2 of the Company  Schedule by the terms of this Section  2.17(a) and was
not so listed) and (ii) any  technology,  know-how,  inventions  or  proprietary
information that (x) is (or is reasonably  likely to be) incorporated in, and is
a material component of, a Material Company Product (or any material  component,
module,  feature or  subassembly  thereof),  (y) is subject to protection  under
applicable  law as a trade  secret  right or  equivalent  intellectual  property
right,  and (z) is owned  by the  Company  or its  Subsidiaries;  and  "Material
Company Product" shall mean those existing and proposed  products of the Company
and its Subsidiaries listed on Schedule 2.17(a)-4 of the Company Schedule.

          (b) The Company Intellectual  Property set forth in Schedule 2.17(a)-1
of the Company  Schedule is owned by the  Company or its  Subsidiaries  free and
clear of all Encumbrances other than Permitted Encumbrances.

          (c) The sale of the  Transferred  Company Shares and Holding Shares by
the Seller to the Purchaser  under this  Agreement will not cause the forfeiture
or  termination of any of the rights of the Company or its  Subsidiaries  to the
Company  Intellectual  Property or in any way impair the right of the Company or
its Subsidiaries to sell,  license or dispose of, or to bring any action for the
infringement of, any Company Intellectual  Property or to manufacture,  sell and
use any Material  Company  Product,  except for any  forfeiture,  termination or
impairment  which would not  reasonably  be expected to have a Material  Adverse
Effect on the Company.

          (d)  There  are no  royalties,  honoraria  or other  similar  payments
payable by the Company or any of its Subsidiaries to any third party for the use
by the Company or any of its Subsidiaries of any Company  Intellectual  Property
or for the manufacture, sale or use by the Company or any of its Subsidiaries of
any Material Company Product, other than (i) payments to the Office of the Chief
Scientist, and (ii) payments under Listed Agreements.

          (e) To the knowledge of the Company, the Company Intellectual Property
that is owned by the Company, the use thereof by the Company or its Subsidiaries
and the manufacture,  sale or use of any Material Company Product by the Company
or its Subsidiaries  does not, in any case,  infringe upon any U.S.,  Israeli or
other foreign patent, trade secret, copyright,  trade name or other intellectual
property  right of any third party.  To the  knowledge of the Company,  no third
party is infringing upon any Company Intellectual  Property that is owned by the
Company,  except where the infringement would not reasonably be expected to have
a Material Adverse Effect on the Company.  The Company owns or has a valid right
to use (by license, title or other right) all Company Intellectual Property that
is  incorporated  in,  and is a material  component  of,  the  Material  Company
Products.  There is no action, suit or proceeding pending against the Company or
its  Subsidiaries  before  any  court  or  governmental  agency  or  before  any
arbitrator (and no person has since  January 1, 1996  threatened  orally (to an
officer or

                                       10


director of the  Company) or in a writing  delivered  to the Company to commence
any  such  action,  suit  or  proceeding  against  the  Company  or  any  of its
Subsidiaries)  contesting the validity of, or the right of the Company or any of
its  Subsidiaries to own, use,  license or dispose of, any Company  Intellectual
Property or contesting  the right of the Company or any of its  Subsidiaries  to
manufacture, sell or use any Material Company Product.

     (f) The Individual Parent  Shareholders (as defined below) have assigned to
the Company (or have  otherwise  permitted  the Company to acquire) all of their
ownership rights (if any) in their Specified  Intellectual  Property (as defined
below) and have not voluntarily  assigned any of such ownership  rights (if any)
in their Specified Intellectual Property to any university or to any other third
party. Without limitation of the foregoing, there are no contractual obligations
binding on any of the Individual Parent  Shareholders with any other employer or
institute of higher education which gives rise to any meritorious  claim in such
employer or institute to any of the Specified Intellectual Property,  except any
such claim which  would not  reasonably  be expected to have a Material  Adverse
Effect on the Company.  For purposes of this  Agreement (A)  "Individual  Parent
Shareholders"  shall  mean  Yossi  Tulpan,  Amos Fiat and Yossi  Cohen,  and (B)
"Specified  Intellectual  Property" of an Individual  Parent  Shareholder  shall
mean: (i) those material patents developed by such Individual Parent Shareholder
that provide  intellectual  property  protection  for any software,  hardware or
invention  that (A) has been  personally  developed  by such  Individual  Parent
Shareholder,  and  (B) is  material  to the  business  of the  Company  and  its
Subsidiaries;  and (ii) those material copyrights and trade secrets developed by
such Individual Parent Shareholder that provide intellectual property protection
for  any  software,  hardware  or  invention  that  (A)  relates  to  encryption
technology,  (B)  has  been  personally  developed  by  such  Individual  Parent
Shareholder,  and  (C) is  material  to the  business  of the  Company  and  its
Subsidiaries.  For purposes of the preceding sentence, any software, hardware or
invention  will be deemed to be "material to the business of the Company and its
Subsidiaries"  only if such software,  hardware or invention is incorporated in,
and is a material  component of, any Material  Company  Product (or any material
component, module, feature or subassembly of any such Material Company Product).

     (g) The Company has taken  reasonable steps to implement a policy requiring
each employee and consultant of or to the Company and its Subsidiaries  that has
contributed in a material respect to the development of any software,  hardware,
inventions, improvements, know-how or other proprietary information incorporated
into a Material Company Product to enter into an agreement  substantially in the
form of that certain form of agreement  delivered to the Purchaser,  or to enter
into an ageement affording  comparable  protection to the protection provided by
such agreement delivered to the Purchaser.

     2.18. Real Estate. Schedule 2.18 of the Company Schedule sets forth a brief
description  of all real property  which is owned by or leased to the Company or
its  Subsidiaries.  None  of  the  properties  occupied  by the  Company  or its
Subsidiaries, or the occupancy or operation thereof by the Company or any of its
Subsidiaries,  is in  violation  of any law or any  building,  zoning  or  other
ordinance,  code or regulation in such a manner as to materially  interfere with
the use and  occupancy  thereof in the  ordinary  course of the  business of the
Company and its  Subsidiaries.  No written notice from any governmental body has
been served upon the Company or any of its  Subsidiaries  since  January 1, 1995
claiming any material violation by the Company or any of its Subsidiaries of any
such law,  ordinance,  code or regulation,  or requiring any

                                       11



substantial  work,  repairs,   construction,   alterations  or  installation  be
undertaken by the Company or any of its  Subsidiaries  on or in connection  with
said  properties,  except for notices that have been  complied with or withdrawn
and notices of violations that have been cured in all material respects.

     2.19. Insurance.  Schedule 2.19 of the Company Schedule provides a complete
list  and  brief  description  of all  policies  of fire,  liability  (including
officers'  and  directors'  liability),  title,  key-man life and other forms of
insurance held by the Company and its Subsidiaries as of the date hereof.


     2.20. Company Taxes.


          (a) All taxes, including, without limitation, income, property, sales,
use, franchise, excise, value added, capital, social security,  withholding, and
employees'  withholding  taxes  imposed by the State of Israel,  by any  foreign
country,  or by any political  subdivision of the State of Israel or any foreign
country,  which  have  become  due  and  payable  by the  Company  or any of its
Subsidiaries  prior to the date of this  Agreement and which are material to the
Company and its Subsidiaries, including any material taxes for which the Company
or any of its  Subsidiaries  is  liable  under  contract  or other  arrangement,
together with any interest or penalties thereon (the "Company Taxes"), have been
paid in full or  adequately  provided  for by  reserves  shown  on the  books of
account of the Company;  all deposits  required by law to be made by the Company
and its Subsidiaries  with respect to the Company Taxes have been duly made, and
all material  returns with respect to the Company  Taxes which are levied on the
basis of income have been filed with, and where  indicated on Schedule 2.20.1 of
the Company Schedule, have been examined by the relevant tax authorities through
the fiscal years ended on or before  December 31, 1996, and no extension of time
for the  assessment  of  deficiencies  with  respect to  Company  Taxes has been
granted by the  Company  and is in effect for any  fiscal  year.  As of June 30,
1997,  neither the Company nor any  Subsidiary was liable for the payment of the
Company Taxes which are levied on the basis of income in any jurisdiction  other
than  those  listed  on  Schedules  2.2  and  2.8 of the  Company  Schedule.  No
deficiency  or  adjustment  in  respect  of any of the  Company  Taxes  has been
assessed  against  the  Company  or any  Subsidiary  prior  to the  date of this
Agreement  and remains  unpaid,  other than such  Company  Taxes which are being
contested  in good faith and  disclosure  of which has been  previously  made in
writing to the  Purchaser,  and to the knowledge of the Company there is not any
proposed or  threatened  assessment  of  additional  liability for Company Taxes
(that  remains  unpaid)  against  the Company or any  Subsidiary  for any period
ending prior to June 30, 1997.

          (b) Schedule  2.20.1 of the Company  Schedule  lists each material tax
incentive (other than generally  available  incentives that are not specifically
granted or awarded to the  Company) to which the  Company is entitled  under the
laws of the State of Israel as of the date of this  Agreement,  the  period  for
which such tax incentive applies,  and the nature of such tax incentive.  To the
knowledge  of  the  Company,   the  Company  has  complied   with  all  material
requirements  of  Israeli  law  to be  entitled  to  claim  the  tax  incentives
identified in Schedule 2.20.1 of the Company  Schedule.  To the knowledge of the
Company,  subject to the  receipt  of the  approvals  set forth in  Section  8.3
hereof, the consummation of the stock purchase contemplated

                                       12


by this Agreement  will not  materially and adversely  affect the ability of the
Company to claim the benefit of any tax incentive referred to on Schedule 2.20.1
of the Company  Schedule for the remaining  duration of the incentive or require
any  recapture of any such  previous  incentive  claimed by the Company,  and no
consent or approval of any  governmental  authority is  required,  other than as
contemplated  by Section 8.3 hereof prior to  consummation of the stock purchase
contemplated  by this  Agreement  in order to preserve  the  entitlement  of the
Company to any such incentive.

     2.21.  Environmental  Matters.  The  Company  and its  Subsidiaries  are in
substantial  compliance  with  all  applicable  environmental   regulations  and
environmental standards applicable to the conduct of the business of the Company
and its Subsidiaries, as the case may be (except where the failure to be in such
compliance would not have a Material  Adverse Effect on the Company),  and there
exists  no  unlawfully  stored  or  maintained  toxic  waste or  other  unlawful
environmental  hazard that has not  previously  been disclosed in writing to the
Purchaser and which is not reflected in the  Financial  Statements,  which would
have a Material Adverse Effect on the Company.


     2.22. Agreements and Obligations.


     (a) A "Listed  Agreement" shall mean a material executory contract to which
the Company or any of its  Subsidiaries or Holdings is a party as of the date of
this  Agreement  that is in one of the  categories  specified  in the  following
clauses  "(i)"  through  "(xv)" and that is not an Excluded  Agreement:  (i) any
contract pursuant to which any Company  Intellectual  Property is being licensed
by the Company or any of its  Subsidiaries  to any third  party  (other than (A)
end-user  licenses  entered into in the ordinary  course of business and (B) any
contract entered into on terms that do not materially deviate from the Company's
standard  terms  previously  disclosed  to the  Purchaser),  (ii)  any  contract
pursuant  to which (A) a third party is  licensing  to the Company or any of its
Subsidiaries any material software, patents, or other proprietary information or
technical  know-how and (B) the Company is required to pay a material royalty or
any other material fixed or variable fee or  consideration  for such  licensing,
(iii)  any   employment   contract  that  is  with  any  employee  whose  annual
compensation exceeds $50,000 that has a remaining term exceeding six (6) months,
(iv)  any  consulting   contract  that  is  with  any  consultant  whose  annual
compensation  exceeds  $50,000,  (v) any  contract  with  any  current  officer,
director, employee or stockholder of the Company, the Seller or the Subsidiaries
(or with an affiliate or relative of any such officers, directors,  employees or
stockholders)  that is on terms  that are less  favorable  to the  Company  than
comparable contracts negotiated at arm's length, or that requires the Company to
indemnify  such  officers,   directors,   employees  or  stockholders  in  their
capacities  as such,  (vi) any pension,  retirement,  profit  sharing,  deferred
compensation,  health or life  insurance,  bonus or  incentive  plan,  (vii) any
contract  pursuant  to which the Company or any of its  Subsidiaries  is leasing
real  property from any third party,  (viii) any contract  pursuant to which the
Company or any of its Subsidiaries is leasing  personal  property from any third
party and which requires  payments by the Company or any of its  Subsidiaries of
more than  $10,000  per  annum,  (ix) any union or other  collective  bargaining
agreement,  (x) any  contract  for the  purchase  by the  Company  or any of its
Subsidiaries  of materials,  products,  supplies or equipment which (A) requires
that the  Company  or any of its  Subsidiaries  pay in the  future  in excess of
$50,000, (B) contains any escalator or renegotiation or redetermination  clause,
or (C) commits the

                                       13


Company or any of its  Subsidiaries  for a fixed  term of three  months or more,
(xi) any agreement or instrument  evidencing  indebtedness for borrowed money in
excess of $50,000 or  creating  any  security  interest  (other than a Permitted
Encumbrance) in any material property owned or used by the Company or any of its
Subsidiaries,  (xii) any contract containing  covenants limiting in any material
respect the legal right of the Company or any of its  Subsidiaries to compete in
any material line of business in which the Company or any of its Subsidiaries is
or has  historically  been  engaged,  (xiii)  any  material  reseller,  original
equipment  manufacturer  or  distribution  agreement,  (xiv) any contract with a
customer of the Company for the sharing of fees, the rebating of charges to such
customer,  or other similar arrangement not reflected in the Company's books and
records, or (xv) any contract with holders of the Company's  securities in their
capacities as such.  Notwithstanding  anything to the contrary contained in this
Agreement,  a contract that is an "Excluded Agreement" shall not be deemed to be
a "Listed Agreement." An "Excluded Agreement" shall mean a contract that: (w) is
between or among two or more of the Company and its Subsidiaries or Holdings, or
(x)  imposes  no  material  future  obligations  on  the  Company  or any of its
Subsidiaries,  or (y) is  expected to be fully  performed,  or is  scheduled  to
expire,  on or prior to the date 90 days  after the  Closing  Date  without  any
continuing  material  financial  liability  on the  part of the  Company  or its
Subsidiaries,  or (z) can be canceled or otherwise  terminated by the Company or
any of its  Subsidiaries  on notice of 90 days or less  without  any  continuing
material  financial  liability  on the part of the Company or its  Subsidiaries;
provided,  however,  that any  agreement  pursuant  to which the  Company or its
Subsidiaries  license any  Company  Intellectual  Property  from any third party
shall not be deemed an Excluded Agreement by virtue of the preceding clauses (y)
or (z).

          (b)  Schedule  2.22 of the  Company  Schedule  lists all of the Listed
Agreements.  A true and  correct  copy of each  Listed  Agreement  has been made
available to the Purchaser.

          (c) The Company and its  Subsidiaries  are not in breach or default in
any  material  respect  under any of the Listed  Agreements  such that the other
party would be permitted  to terminate a Listed  Agreement or would have a claim
for  material  damages  against  the  Company  or  its  Subsidiaries  and to the
knowledge  of the  Company  (i) no other  party  thereto  is in  default  in any
material  respect  thereunder,  and (ii) no event has occurred  which,  with the
giving of notice or the  passage  of time,  would  become  such a default by the
Company or any of its Subsidiaries such that such other party would be permitted
to  terminate  any such  Listed  Agreement  or would  have a claim for  material
damages against the defaulting party. The Company has taken all corporate action
necessary for the Company to properly  enter into the Listed  Agreements and has
not terminated or taken any action to terminate any of the Listed Agreements. To
the  knowledge  of the Company,  there are no writings  extrinsic to any of such
Listed Agreements which would materially modify their terms.

          (d) None of the Listed  Agreements  that have been  furnished  or made
available  only in a language  other than  English or Hebrew:  (i) limits in any
material  respect the legal right of the Company or its  Subsidiaries to compete
in any material line of business,  (ii) contains any unduly  burdensome  term or
covenant  that is  reasonably  likely to have a Material  Adverse  Effect on the
Company, or (iii) grants a material exclusive license to a third party as to any
Company Intellectual Property.

                                       14


     2.23.  Inventory.  The  inventory  of the Company and its  Subsidiaries  as
reflected on the balance sheet included in the Unaudited  Consolidated Financial
Statements  (which has not been sold by the  Company or its  Subsidiaries  since
June 30,  1997)  is,  in all  material  respects:  (i) in good and  merchantable
condition,  and (ii) currently of a useable and saleable quality. Such inventory
is carried on the relevant books of account at values that approximate the lower
of cost or market,  in  conformity  with Israel  generally  accepted  accounting
principles applied on a consistent basis.

     2.24. Accounts Receivable. All accounts receivable reflected on the balance
sheet included in the Unaudited Consolidated Financial Statements have arisen in
the ordinary  course of business  and, to the extent not collected  prior to the
date hereof, represent valid obligations due to the Company or its Subsidiaries,
in the aggregate recorded amounts thereof, except to the extent set forth in the
Unaudited Consolidated Financial Statements as reserves for bad debts.

     2.25.  Condition of Plant and Equipment.  All machinery and equipment owned
by the  Company or any  Subsidiary  or  otherwise  used in the  conduct of their
business is, to the knowledge of the Company,  in good  operating  condition and
repair, except for normal breakdowns, reasonable wear and use and damage by fire
or unavoidable casualty, not materially affecting the business of the Company.

     2.26. Customers and Suppliers.  Schedule 2.26 of the Company Schedule lists
the ten largest  customers and the ten largest  suppliers of the Company and its
Subsidiaries on a consolidated basis for the year ended December 31, 1996. Since
January 1,  1997,  there has been no  material  adverse  change in the  business
relationship of the Company with any customer or supplier named on Schedule 2.26
of the  Company  Schedule  (except for  fluctuations  in the level of orders and
changes in the Company's customer base which have not had and are not reasonably
likely to have a Material Adverse Effect on the Company).

     2.27.  Banking  Arrangements.  Schedule  2.27 of the Company  Schedule sets
forth:  (i) the  name of each  bank,  trust  company,  brokerage  firm or  other
financial  institution  in or with  which the  Company  or a  Subsidiary  has an
account having a balance of at least $10,000 as of the date of this Agreement, a
credit line with an  outstanding  balance of at least  $10,000 as of the date of
this  Agreement  or a safety  deposit box  containing  assets with a value of at
least  $10,000  as of the date of this  Agreement  and the names of all  persons
authorized  as of the date of this  Agreement to draw  thereon or having  access
thereto, and a brief statement describing the purpose of each such account.

     2.28.  Company  Products.  To the  knowledge  of the  Company,  none of the
existing products of the Company have any defects in design or otherwise fail to
comply with their published  specifications  where, in either case, such defects
or non-compliance would have a Material Adverse Effect on the Company.

     2.29. Potential Conflicts of Interest; Powers of Attorney. To the knowledge
of the  Company,  no officer,  director or greater  than 5%  shareholder  of the
Company or its Subsidiaries, or any member of their immediate families, owns any
material  property  or  rights  tangible  or  intangible,  the use of  which  is
necessary for such  business as now  conducted.  Schedule  2.29

                                       15



of the Company  Schedule sets forth the names of all persons now holding  powers
of attorney from the Company or any Subsidiary as of the date of this Agreement,
and a summary of the terms thereof.


     2.30. Interested Party Transactions. Since January 1, 1996, there have been
no  transactions  involving the Company or the  Subsidiaries  and any interested
parties which come within the purview of Chapter 4A of the  Companies  Ordinance
(new Version) 1983.

     2.31.  Brokers.  Except with respect to the engagement of Hambrecht & Quist
LLC by the Company,  the terms of which have been  presented  to the  Purchaser,
neither the Company nor any of its officers or directors has engaged,  consented
to, or authorized  any broker or investment  banker to act on its or his behalf,
directly  or  indirectly,   as  a  broker  or  finder  in  connection  with  the
transactions contemplated by this Agreement.


     2.32.  Compliance  with Law.  The Company is in  compliance  with all laws,
regulations  and  orders   applicable  to  its  business,   including,   without
limitation, applicable environmental, anti-pollution, building, zoning or health
laws,  ordinances  and  regulations  in respect of its  plants,  structures  and
equipment, except where the failure by the Company to be in compliance with such
laws,  regulations  and orders would not have a Material  Adverse  Effect on the
Company.  The Company has not  received any written  notification  that it is in
violation of any such laws,  regulations or orders,  except for (i) notices that
have been  complied with in all material  respects,  (ii) notices that have been
withdrawn,  or (iii) notices of violations  that have been cured in all material
respects, or that relate to violations which can no longer form the basis of any
material liability to the Company or would not otherwise  reasonably be expected
to have a Material  Adverse  Effect on the Company.  Neither the Company nor, to
the  knowledge  of the Company,  any employee or agent of the Company  acting on
behalf of the  Company  has made any illegal  payments  to any  governmental  or
quasi-governmental officials.


     2.33.  Foreign  Investor.  The  Seller  is  not a  U.S.  person  and is not
acquiring the shares of Purchaser Common Stock for the account or benefit of any
U.S.  person,  as those terms are defined in  Regulation S under the  Securities
Act.

     2.34. Resales Subject to U.S. Securities Laws. The Seller acknowledges that
the shares of Purchaser Common Stock being issued to the Seller pursuant to this
Agreement  have not been  registered  under the  Securities  Act,  and agrees to
resell the shares of Purchaser  Common Stock being issued to the Seller pursuant
to this Agreement only in accordance with the Seller's Agreement.

     2.35.  Offshore  Execution.  This Agreement is being executed by the Seller
outside the United States.

     2.36. Holdings.


          (a) Holdings (i) has not conducted any material business following its
initial  organization,  (ii) has not  incurred any  material  liabilities  since
January  1,  1997 of the type and  magnitude  required  to be  reflected  in the
liabilities  column of a  consolidated  balance  sheet of  Holdings  prepared in
accordance with Israel generally accepted accounting principles,

                                       16



or (iii)  has not  directly  incurred  liabilities  or  obligations,  actual  or
contingent, that exceed or may exceed in the aggregate $10,000. Holdings (1) has
no  subsidiaries,  (2) does not own any  securities of any entity other than the
Company,  and (3) has title to 38,770 ordinary  shares of the Company,  free and
clear  of  all  liens,  pledges,  charges,  encumbrances,   security  interests,
restrictive   agreements   and   assessments   (other   than   restrictions   on
transferability  generally  imposed on securities  under  applicable  securities
laws).

          (b) The authorized  capital of Holdings  consists of 238,000  ordinary
shares,  NIS .010 nominal value per share, of which 81,749 shares are issued and
outstanding as of the date of this Agreement.  All of the issued and outstanding
ordinary  shares of Holdings have been legally and validly  issued and are fully
paid and  nonassessable.  There are no outstanding  options,  warrants,  rights,
calls,  commitments or agreements calling for the issuance or transfer,  sale or
disposition  by Holdings of any shares of the capital  stock of Holdings,  or of
any securities convertible or exchangeable,  actually or contingently,  into any
such capital stock, to which Holdings is a party or by which Holdings is bound.



                                   ARTICLE III

                 REPRESENTATIONS AND WARRANTIES OF THE PURCHASER


         The Purchaser hereby  represents and warrants to the Seller,  except as
otherwise set forth in the Disclosure  Schedule being furnished by the Purchaser
to the Seller  simultaneously  with the execution and delivery of this Agreement
(the "Purchaser Schedule"), or as disclosed or otherwise described in any of the
documents listed or set forth in the Purchaser  Schedule or this Article III, as
follows:

     3.1.  Organization  of  Purchaser.  The  Purchaser  is a  corporation  duly
organized and validly existing under the laws of the State of California and has
full power and authority to carry on its business as now  conducted,  and to own
its assets.  The  Purchaser  is duly  qualified  to do  business  and is in good
standing in each  jurisdiction  in which the failure to be so  qualified  and in
good standing would have a Material  Adverse  Effect on the  Purchaser,  is duly
authorized  and licensed  under all laws,  regulations,  ordinances or orders of
public authorities,  or otherwise, to carry on its business in the places and in
the manner presently  conducted,  except for  qualifications,  authorizations or
licenses for which the failure to obtain, if required, would not have a Material
Adverse Effect on the Purchaser.  The Purchaser has heretofore made available to
the Company true and complete copies of its Articles of Incorporation and Bylaws
as certified by the Secretary of the Purchaser, as in effect on the date hereof.
For  purposes of this  Agreement,  those  corporations  in which the  Purchaser,
directly or indirectly,  through other  corporations  or otherwise,  owns 50% or
more  of the  outstanding  capital  stock  shall  be  deemed  to be a  Purchaser
Subsidiary.

     3.2. Nonviolation.  The consummation by the Purchaser of the stock purchase
contemplated  by this  Agreement  will  not (a)  violate  or  conflict  with the
Articles of Incorporation or Bylaws of the Purchaser or any Purchaser Subsidiary
(b) except as set forth in this  Agreement,  require  the  consent,  approval or
authorization of any governmental or quasi-governmental person or entity, except
where the failure to obtain such consent, approval or

                                       17



authorization would not have a Material Adverse Effect on the Purchaser,  or (c)
give rise to a right to  terminate  by the other  party  thereto  or result in a
breach of the terms or conditions of or constitute a default under,  or violate,
as the case may be, any Material Agreement (as defined below).

     3.3. Authority for Agreement.  All corporate and other proceedings required
to be taken by or on  behalf of the  Purchaser  to  authorize  and  approve  the
entering into and carrying out of this Agreement by the Purchaser have been duly
executed and properly taken. This Agreement has been duly executed and delivered
by the Purchaser  and is valid and binding upon the  Purchaser,  subject,  as to
enforceability,  to  bankruptcy,  insolvency,  reorganization  and other laws of
general applicability  relating to or affecting creditors' rights and to general
principles of equity.

     3.4. Capitalization. As of August 28, 1997, the authorized capital stock of
the Purchaser  consisted of (i) 5,000,000  shares of Preferred  Stock,  $.01 par
value per  share,  of which no shares  were  issued  and  outstanding,  and (ii)
45,000,000  shares of Purchaser  Common Stock, of which  26,003,636  shares were
issued and  outstanding.  All of the issued and outstanding  shares of Purchaser
Common  Stock  have been  legally  and  validly  issued  and are fully  paid and
nonassessable.  The shares of Purchaser  Common  Stock to be issued  pursuant to
this  Agreement  will  be duly  authorized,  validly  issued,  fully  paid,  and
nonassessable.

     3.5. Options, Warrants, Etc. Other than as set forth in Section 3.4 hereof,
there are no other  outstanding  shares of capital stock or voting securities of
the  Purchaser  other than shares of  Purchaser  Common  Stock  issued under the
Purchaser's  various  stock  option  plans as in effect at the date  hereof (the
"Purchaser Stock Option Plans"). As of the close of business on August 28, 1997,
the  Purchaser  has  reserved  5,950,000  shares of  Purchaser  Common Stock for
issuance to  employees  and  directors  pursuant to the  Purchaser  Stock Option
Plans,  of which  3,897,051  shares  were  subject to  outstanding,  unexercised
options.  Other than this  Agreement and pursuant to the Purchaser  Stock Option
Plans,  and except as  disclosed  in the  Purchaser  SEC  Documents  (as defined
below),  there are no other options,  warrants,  calls,  rights,  commitments or
agreements of any  character to which the Purchaser or any Purchaser  Subsidiary
is a party or is bound  obligating the Purchaser or any Purchaser  Subsidiary to
issue, deliver,  sell,  repurchase or redeem, or cause to be issued,  delivered,
sold,  repurchased or redeemed, any shares of the capital stock of the Purchaser
or any  Purchaser  Subsidiary  or  obligating  the  Purchaser  or any  Purchaser
Subsidiary to grant, extend or enter into any such option, warrant, call, right,
commitment or agreement.

     3.6. SEC  Documents;  Financial  Statements.  The  Purchaser  has filed all
statements,   reports,  registration  statements,  proxy  statements  and  other
documents required to be filed by the Purchaser with the Securities and Exchange
Commission  (the  "SEC")  since  January 1, 1996 and has made  available  to the
Company a true and complete copy of each such  statement,  report,  registration
statement  (with the prospectus in the form filed pursuant to Rule 424(b) of the
Securities Act),  definitive  proxy  statement,  and other documents in the form
filed with the SEC by the Purchaser from January 1, 1996, and, until the Closing
Date,  the  Purchaser  will have  furnished  the Company  with true and complete
copies of any additional  documents filed with the SEC by the Purchaser prior to
the Closing Date (all such statements,  reports,  registration statements, proxy
statements and other documents filed by the Purchaser with the SEC are

                                       18



referred to as the "Purchaser SEC  Documents").  In addition,  the Purchaser has
made available to the Company all exhibits to the Purchaser SEC Documents  filed
prior to the date hereof,  and will promptly  make  available to the Company all
exhibits to any  additional  Purchaser SEC Documents  filed prior to the Closing
Date.  All  documents  required  to be filed as exhibits  to the  Purchaser  SEC
Documents have been so filed, and all Material  Agreements (as defined below) so
filed as exhibits are in full force and effect,  except those which have expired
in accordance  with their terms,  and Purchaser is not in default under any such
Material  Agreements.  As of their  respective  filing dates,  the Purchaser SEC
Documents  complied  in all  material  respects  with  the  requirements  of the
Securities  Exchange  Act of 1934,  as amended  (the  "Exchange  Act"),  and the
Securities  Act, and none of the Purchaser  SEC  Documents  contained any untrue
statement of a material  fact or omitted to state a material fact required to be
stated therein or necessary to make the statements made therein, in light of the
circumstances  in which they were  made,  not  misleading,  except to the extent
corrected  by  a  subsequently  filed  Purchaser  SEC  Document.  The  financial
statements of Purchaser,  including the notes thereto, included in the Purchaser
SEC Documents (the "Purchaser  Financial  Statements") were complete and correct
in all material  respects as of their respective  dates,  complied as to form in
all material  respects  with  applicable  accounting  requirements  and with the
published  rules and  regulations  of the SEC with  respect  thereto as of their
respective  dates,  and have been  prepared in  accordance  with U.S.  generally
accepted accounting principles ("GAAP") applied on a consistent basis throughout
the periods indicated and consistent with each other (except as may be indicated
in the  notes  thereto  or,  in the case of  unaudited  statements  included  in
Quarterly  Reports  on Form 10-Q,  as  permitted  by Form 10-Q of the SEC).  The
Purchaser  Financial  Statements  fairly  present  the  consolidated   financial
condition  and  operating  results of the  Purchaser at the dates and during the
periods  indicated  therein (subject,  in the case of unaudited  statements,  to
normal,  recurring  year-end audit adjustments not material in scope or amount).
There  has been no  change  in the  Purchaser  accounting  policies,  except  as
described in the notes to the Purchaser Financial  Statements,  since January 1,
1996.

     3.7.  Absence  of Certain  Changes.  Since  June 30,  1997 (the  "Purchaser
Balance Sheet  Date"),  the Purchaser has conducted its business in the ordinary
course consistent with past practice and there has not occurred: (i) any change,
event or  condition  that has resulted  in, or might  reasonably  be expected to
result  in, a  Material  Adverse  Effect on the  Purchaser;  (ii) any  change in
accounting  methods or practices  by the  Purchaser  or any  revaluation  by the
Purchaser of any of its assets; (iii) any declaration, setting aside, or payment
of a dividend or other distribution with respect to the shares of the Purchaser,
or any direct or  indirect  redemption,  purchase  or other  acquisition  by the
Purchaser of any of its shares of capital  stock,  except for regular  dividends
and stock repurchases at market prices at the time of repurchase,  and except as
set forth in the Purchaser SEC  Documents;  (iv) any material  contract  entered
into by the  Purchaser or any  Purchaser  Subsidiary  other than in the ordinary
course of business,  or any material  amendment  or  termination  of, or default
under, any material contract to which the Purchaser or any Purchaser  Subsidiary
is a party or by which it is bound;  or (v) any  negotiation or agreement by the
Purchaser or any Purchaser  Subsidiary to do any of the things  described in the
preceding clauses (i) through (iv).

     3.8. Absence of Undisclosed Liabilities.  As of the Purchaser Balance Sheet
Date,  the Purchaser has no material  obligations or liabilities of the type and
magnitude  required to be disclosed in the liabilities  column of a consolidated
balance  sheet  prepared in accordance with

                                       19


GAAP (whether accrued, absolute,  contingent or otherwise, and whether due or to
become  due) other than (i) those set forth or  adequately  provided  for in the
balance  sheet  included in  Purchaser's  Quarterly  Report on Form 10-Q for the
period ended June 30, 1997 (the "Purchaser Balance Sheet"), (ii) those expressly
disclosed  in any  Exhibit  hereto or in the  Purchaser  Schedule,  (iii)  those
incurred in  connection  with the  execution of this  Agreement,  and (iv) those
fully covered by insurance and not otherwise having a Material Adverse Effect on
the Purchaser.

     3.9.  Permits.   The  Purchaser  and  each  Purchaser  Subsidiary  has  all
governmental permits, licenses,  orders, approvals,  franchises and other rights
and privileges necessary in order for them to carry on their respective business
as  presently  conducted,  except such  permits,  licenses,  orders,  approvals,
franchises,  and other rights and privileges of which the failure to obtain,  if
required, would not have a Material Adverse Effect on the Purchaser.

     3.10.  Litigation.  There  are no  actions,  suits,  legal  proceedings  or
governmental or quasi-governmental  investigations,  pending before any court or
governmental  agency  or  before  any  arbitrator  of any  kind,  or any  order,
injunction or decree  outstanding,  and, to the knowledge of the  Purchaser,  no
person has since January 1, 1996 threatened  orally (to any executive officer or
director of the  Purchaser) or in writing to commence any action,  suit or legal
proceeding  against the  Purchaser  or any  Purchaser  Subsidiary  or against or
relating to either of their property,  assets or business, that would reasonably
be  expected to have a Material  Adverse  Effect on the  Purchaser.  Neither the
Purchaser nor any Purchaser  Subsidiary is in violation of any  applicable  law,
regulation,  ordinance, order, injunction, decree, award or other requirement of
any governmental or  quasi-governmental  body, court, or arbitrator  relating to
its property, assets, or business, except for violations which  would not have a
Material Adverse Effect on the Purchaser.

     3.11. Broker's and Finders' Fees. Except for the fees of its advisor, Volpe
Brown Whelan & Company LLC, the Purchaser  has not incurred,  nor will it incur,
directly or indirectly,  any liability for brokerage or finders' fees or agents'
commissions  or investment  bankers'  fees or any similar  charges in connection
with this Agreement or any transaction contemplated hereby.

     3.12. Material Agreements

          (a) A "Material  Agreement"  shall mean any  agreement  or contract to
which  the  Purchaser  or any  Purchaser  Subsidiary  is a party or by which the
Purchaser  or a Purchaser  Subsidiary  is bound and that is or is required to be
filed as an  exhibit  to any of the  Purchaser  SEC  Documents  pursuant  to the
applicable  rules and  regulations  of the SEC and (ii) that has not  expired or
been validly terminated prior to the date hereof.

          (b) The Purchaser and the Purchaser  Subsidiaries are not in breach or
default in any material  respect under any of the Material  Agreements such that
the other party would be permitted  to  terminate a Material  Agreement or would
have a claim  for  material  damages  against  the  Purchaser  or the  Purchaser
Subsidiaries. To the knowledge of the Purchaser (i) no other party thereto is in
any default in any material  respect  under any Material  Agreement  and (ii) no
event has  occurred  which,  with the  giving of notice or the  passage of time,
would  become  such  a  default  by  the  Purchaser  or  any  of  the  Purchaser
Subsidiaries such that

                                       20


such other party would be  permitted  to terminate  such  Material  Agreement or
would have a claim for material damages against the defaulting party. All of the
Material Agreements are valid and in full force and effect and, to the knowledge
of the Purchaser,  none is subject to rescission or reformation and there are no
circumstances  or writings  extrinsic to any of such Material  Agreements  which
would materially modify their terms or prevent their assignment.

     3.13.  Compliance  with Law. The Purchaser is in compliance  with all laws,
regulations  and  orders   applicable  to  its  business,   including,   without
limitation, applicable environmental, anti-pollution, building, zoning or health
laws,  ordinances  and  regulations  in respect of its  plants,  structures  and
equipment,  except where the failure by the Purchaser to be in  compliance  with
such laws,  regulations  and orders would not have a Material  Adverse Effect on
the  Purchaser.  The Purchaser has not received any  notification  that it is in
violation of any such laws,  regulations or orders,  except for (i) notices that
have been  complied with in all material  respects,  (ii) notices that have been
withdrawn,  or (iii) notices of violations  that have been cured in all material
respects or that relate to violations  which can no longer form the basis of any
material liability of the Purchaser or would otherwise reasonably be expected to
have a Material  Adverse Effect on the Purchaser.  Neither the Purchaser nor, to
the knowledge of the Purchaser, any employee or agent of the Purchaser acting on
behalf of the Purchaser  has made any illegal  payments to any  governmental  or
quasi-governmental officials.

     3.14. Purchaser Taxes. All taxes,  including,  without limitation,  income,
property, sales, use, franchise,  excise, value added, capital, social security,
withholding,  and employees'  withholding taxes imposed by the United States, by
any foreign country, or by any political subdivision of the United States or any
foreign  country,  which have become due and payable by the  Purchaser or any of
the  Purchaser  Subsidiaries  prior to the date of this  Agreement and which are
material to the Purchaser and the Purchaser Subsidiaries, including any material
taxes for which the  Purchaser or any of the  Purchaser  Subsidiaries  is liable
under  contract or other  arrangement,  together  with any interest or penalties
thereon (the "Purchaser  Taxes"),  have been paid in full or adequately provided
for by reserves  shown on the books of account of the  Purchaser;  all  deposits
required by law to be made by the Purchaser and the Purchaser  Subsidiaries with
respect to the Purchaser  Taxes have been duly made. No deficiency or adjustment
in respect of any of the Purchaser Taxes has been assessed against the Purchaser
or any  Purchaser  Subsidiary  prior to the date of this  Agreement  and remains
unpaid,  other than such Purchaser Taxes which are being contested in good faith
and to the  knowledge of the  Purchaser  there is not any proposed or threatened
assessment of additional liability for the Purchaser Taxes (that remains unpaid)
against the Purchaser or any Purchaser Subsidiary for any period ending prior to
December 31 1996.

     3.15.  Investment  Intent of the  Purchaser.  Purchaser  is  acquiring  the
Transferred  Company Shares and the Holdings  Shares for its own account and for
investment,  and not  with a view  to,  or for  sale  in  connection  with,  any
distribution of any of such shares.

                                       21





                                   ARTICLE IV

                       CERTAIN TRANSACTIONS AND AGREEMENTS


     4.1. The  Confidentiality  Agreement.  That certain  Mutual  Non-Disclosure
Agreement,  dated as of June 12, 1997 between the Company and the Purchaser (the
"Confidentiality  Agreement") shall remain in full force and effect between them
and shall not be  terminated or otherwise  modified by this  Agreement and shall
survive any termination of this Agreement in accordance with its terms.


     4.2.  Conduct of Business of the Company and Its  Subsidiaries.  During the
period from the date of this Agreement and  continuing  until the earlier of the
termination  of this Agreement or the Closing Date (the  "Pre-Closing  Period"),
the Company  agrees  (except as otherwise  provided in the last sentence of this
Section 4.2),  and shall  (except as otherwise  provided in the last sentence of
Section  4.2)  cause its  Subsidiaries:  (i) to carry on their  business  in all
material respects in the usual, regular and ordinary course in substantially the
same manner as heretofore  conducted,  (ii) to use their  reasonable  efforts to
preserve substantially intact their present business organizations, (iii) to use
their  reasonable  efforts  consistent  with past practice to keep available the
services of their present  officers and key  employees,  (iv) to use  reasonable
efforts  consistent  with past  practice to preserve  their  relationships  with
customers,  suppliers,  distributors,  licensors,  licensees,  and others having
business  dealings  with  them,  and (v) to  promptly  notify the  Purchaser  in
writing,  after obtaining  knowledge,  of any event or occurrence which would be
likely to cause any  representation or warranty  contained in this Agreement and
made  by it to be  untrue  or  inaccurate  at any  time  from  the  date of this
Agreement to the Closing  Date,  such that the  condition set forth in the first
sentence  of Section  7.1 hereof  would not be  satisfied  as a result  thereof.
Without  limitation  of the  foregoing,  the  Company  agrees  that  during  the
Pre-Closing  Period  (except as otherwise  provided in the last sentence of this
Section 4.2), it will not take any of the following actions:


          (a) Charter Documents. Amend its Memorandum of Association or Articles
of Association;

          (b) Issuance of Securities.  Issue,  deliver or sell any shares of its
capital stock or securities convertible into, or subscriptions, rights, warrants
or options  to  acquire,  or enter into any  agreements  or  commitments  of any
character  obligating  it  to  issue,  any  such  shares  or  other  convertible
securities;

          (c) Dividends;  Changes in Capital Stock. Declare or pay any dividends
on, or make any other  distributions  (whether in cash,  stock or  property)  in
respect of, any shares of its capital stock, or split, combine or reclassify any
shares of its capital  stock,  or issue any other  securities  in respect of, in
lieu of or in  substitution  for shares of its capital  stock,  or repurchase or
otherwise acquire any shares of its capital stock;


                                       22


          (d) Extraordinary  Transactions.  Enter into any material  transaction
outside the ordinary course of business;

          (e) Stock Option Plans, Etc. Adopt any stock option plan;

          (f) Intellectual Property. Transfer to any person or entity any rights
to the Company  Intellectual  Property other than in connection with the sale of
its products in the ordinary course of business consistent with past practice;

          (g) Exclusive Rights.  Enter into or amend any agreements  pursuant to
which any other party is granted  exclusive  marketing or other exclusive rights
of any type or scope  with  respect  to any  Material  Company  Products  or the
Company Intellectual Property; or

          (h) Other.  Agree in writing to take any of the actions  described  in
clauses "(a)" through "(g)" of this sentence.

Notwithstanding  anything  to the  contrary  contained  in this  Section  4.2 or
elsewhere  in this  Agreement,  the  Company and its  Subsidiaries  shall not be
prohibited  from taking,  and shall be permitted to take,  any of the  following
actions (without being deemed to have breached or violated this Agreement):  (i)
any action that is  contemplated  or permitted by, or otherwise  consistent with
the terms of, this Agreement, (ii) any action that is referred to in the Company
Schedule or is  contemplated  or required by the terms of any agreement or other
document identified in the Company Schedule, (iii) any action that is reasonably
determined  by the  Company to be  necessary  or  desirable  for the  purpose of
facilitating the  consummation of any of the  transactions  contemplated by this
Agreement or for the purpose of  facilitating  the  compliance by the Company or
any of its Subsidiaries with any applicable law, rule or regulation, or (iv) any
action that is approved in writing by the  Purchaser (it being  understood  that
the Purchaser  shall not  unreasonably  withhold its approval of any such action
that is proposed to be taken by the Company).


     4.3. Conduct of Business of Purchaser. The Purchaser agrees that during the
Pre-Closing  Period  (except as otherwise  provided in the last sentence of this
Section 4.3), it will not take or permit any Purchaser Subsidiary to take any of
the following actions:

          (a) Charter Documents. Amend its Articles of Incorporation or Bylaws;

          (b) Issuance of Securities.  Issue,  deliver or sell any shares of its
capital stock or securities convertible into, or subscriptions, rights, warrants
or options  to  acquire,  or enter into any  agreements  or  commitments  of any
character  obligating  it  to  issue,  any  such  shares  or  other  convertible
securities,  other than (1) the  issuance,  delivery  and/or  sale of options to
purchase a reasonable  number of shares of Purchaser  Common Stock in connection
with the hiring, retention and/or promotion of employees of the Purchaser or the
Purchaser Subsidiaries,  or (2) the issuance of shares of Purchaser Common Stock
pursuant to the exercise of stock options or other rights  outstanding as of the
date of this  Agreement or issued after the date of this Agreement in accordance
with clause "(1)" of this Section 4.3(b);

                                       23


          (c) Dividends;  Changes in Capital Stock. Declare or pay any dividends
on, or make any other  distributions  (whether in cash,  stock or  property)  in
respect of, any shares of its capital stock, or split, combine or reclassify any
of its capital stock, or issue any other securities in respect of, in lieu of or
in  substitution  for shares of its capital  stock,  or  repurchase or otherwise
acquire any shares of its capital stock except from former employees,  directors
and consultants in accordance  with  agreements  existing as of the date of this
Agreement  providing  for the  repurchase  of  shares  in  connection  with  any
termination of service to it or its subsidiaries;

          (d) Extraordinary  Transactions.  Enter into any material  transaction
outside the ordinary course of business; or

          (e) Other.  Agree in writing to take any of the actions  described  in
clauses "(a)" through "(d)" of this Section 4.3.


Notwithstanding  anything  to the  contrary  contained  in this  Section  4.3 or
elsewhere in this Agreement,  the Purchaser and the Purchaser Subsidiaries shall
not be prohibited  from taking,  and shall be permitted to take,  (i) any action
that is contemplated or permitted by, or otherwise consistent with the terms of,
this Agreement, (ii) any action that is referred to in the Purchaser Schedule or
is  contemplated  or required by the terms of any  agreement  or other  document
identified  in the  Purchaser  Schedule,  (iii) any  action  that is  reasonably
determined  by the  Purchaser to be  necessary  or desirable  for the purpose of
facilitating the  consummation of any of the  transactions  contemplated by this
Agreement or for the purpose of facilitating  the compliance by the Purchaser or
any Purchaser  Subsidiary with any applicable  law, rule or regulation,  or (iv)
any action that is approved in writing by the Company (it being  understood that
the Company shall not unreasonably withhold its approval of any such action that
is proposed to be taken by the Purchaser).


     4.4. Access to Information.


          (a) During the Pre-Closing  Period,  the Seller will cause the Company
to  grant  the   Purchaser  and  its   accountants,   legal  counsel  and  other
representatives access, during normal business hours and upon reasonable advance
notice  throughout  the period prior to the Closing,  to all of the  properties,
books, contracts,  commitments and records relating to the business,  assets and
liabilities of the Company; provided,  however, that (i) the Purchaser shall not
contact,  and the  Purchaser  shall ensure that none of its  accountants,  legal
counsel or other representatives contacts, any employee of the Company or any of
the Subsidiaries without the prior authorization of one of the Individual Parent
Shareholders,  and (ii) the Purchaser  shall ensure that none of its  employees,
legal counsel or other representatives interferes with or otherwise disrupts the
business  or  operations  of  the  Company  or any  of  its  Subsidiaries  while
exercising the rights provided under this Section 4.4(a).

         (b) The  Purchaser  will  grant the Seller  and the  Company  and their
respective  accountants,  legal counsel and other representatives access, during
normal business hours and upon reasonable  advance notice  throughout the period
prior to the Closing, to all of the properties,  books,  contracts,  commitments
and records  relating to the business,  assets and liabilities of the Purchaser;
provided,  however,  that (i) neither the Company nor the Seller shall  contact,
and the  Company  and

                                       24



the Seller shall ensure that none of their respective accountants, legal counsel
or other  representatives  contacts,  any employee of the Purchaser  (other than
those who will be engaged in the  negotiation  of this  Agreement),  without the
prior  authorization  of Robert F. Fougner,  and (ii) the Company and the Seller
shall ensure that none of their  respective  employees,  legal  counsel or other
representatives interferes with or otherwise disrupts the business or operations
of the Purchaser while exercising the rights provided in this Section 4.4(b).

     4.5. No Solicitation.  During the Pre-Closing  Period,  neither the Company
nor the Seller will,  and the Company and the Seller will not  authorize  any of
its  officers,  directors,  employees or other agents to: (i) take any action to
solicit,  initiate  or  knowingly  encourage  any offer or proposal by any third
party for,  or any  indication  of  interest  by any third party in, a merger or
business  combination  by such third party with,  the  acquisition by such third
party of any voting  power in, or the sale or  transfer  (outside  the  ordinary
course of business) to such third party of a  significant  portion of the assets
of, the Company or any material Subsidiary, or (ii) engage in negotiations with,
or  disclose  any  nonpublic  information  relating to the Company to, or afford
access to the properties,  books or records of the Company or any Subsidiary to,
any third party that has advised the Company that it may be considering  making,
or that it has made, an offer or proposal for, or any indication of interest in,
a merger or business  combination  with,  the  acquisition  of any of the voting
power in, or the sale or transfer (outside the ordinary course of business) of a
significant  portion of the assets of, the Company or any  material  Subsidiary,
other than the transactions contemplated by this Agreement.

     4.6. Seller's Agreement. On or before the Closing Date, the Seller and each
of its shareholders (the "Parent Shareholders") shall execute and deliver to the
Purchaser, and the Purchaser shall execute and deliver to the Seller and to each
of the Parent Shareholders, that certain Seller's Agreement in substantially the
form attached  hereto as Exhibit 4.6  ("Seller's  Agreement")  providing  (among
other things) for certain resale  restrictions and registration rights following
the  Closing as to the shares of  Purchaser  Common  Stock  issued to the Seller
hereunder.


     4.7.  Further  Assurances.  Each of the parties hereto agrees that it will,
from time to time after the date of this  Agreement,  execute and  deliver  such
other certificates,  documents and instruments and take such other action as may
be reasonably requested by any of the other parties to carry out the actions and
transactions  contemplated by this  Agreement.  Each of the parties hereto shall
use all reasonable  efforts to take, or cause to be taken, all actions necessary
to consummate the transactions contemplated by this Agreement.  Without limiting
the generality of the foregoing, each party to this Agreement (i) shall make all
filings (if any) and give all notices (if any)  required to be made and given by
such party in connection with the  transactions  contemplated by this Agreement,
(ii) shall use all  reasonable  efforts to obtain each  consent and approval (if
any) required to be obtained  (pursuant to any applicable  legal  requirement or
contract,  or  otherwise)  by such  party in  connection  with the  transactions
contemplated  by this  Agreement,  (iii) shall  cooperate  with each other party
hereto in  connection  with any filings  required to be made or any  consents or
approvals  required to be obtained by such other  party,  and (iv) shall use all
reasonable  efforts to lift any restraint,  injunction or other legal bar to the
consummation of the transactions contemplated by this Agreement.

                                       25



     4.8. Listing of Additional Shares. Prior to the Closing Date, the Purchaser
shall file with the Nasdaq  National  Market a Notification  Form for Listing of
Additional  Shares with respect to those shares of Purchaser  Common Stock to be
issued in connection with the transactions contemplated by this Agreement.

     4.9.  Visitation.  The Purchaser will afford to one  representative  of the
Seller or the Parent Shareholders ("Seller's Board Representative") the right as
a non-voting representative of the Seller or of the Parent Shareholders:  (a) to
attend all meetings of the Purchaser's Board of Directors (the "Board") (subject
to the  Purchaser's  right to request  in good  faith  that such  representative
excuse himself from executive sessions of the Board where a conflict of interest
might be  present  and from  any  Board  meeting  or any  part  thereof  if such
exclusion is reasonably  necessary to preserve the  attorney-client  privilege),
and (b) upon  request,  to  receive  copies  of all  notices  for and  materials
distributed  at or in  connection  with such  meetings,  as well as any proposed
written actions by the Board concurrently with the distribution of such items to
the Board.  Any change in the Seller's  Board  Representative  shall require ten
(10) days  prior  written  notice to the  Purchaser  and the  Purchaser's  prior
written approval,  which shall not be unreasonably withheld if any of the Parent
Shareholders  or an  officer  of any of the  Parent  Shareholders  is the  newly
designated Seller's Board Representative.  Commencing as of the Purchaser's 1998
annual meeting of shareholders,  the Purchaser  agrees, if requested by at least
three of the Parent  Shareholders,  to use its reasonable  efforts to: (1) cause
the  Seller's  Board  Representative  to be  elected  to the  Board;  and (2) if
required to permit  Purchaser to comply with the preceding clause (1), amend the
Purchaser's  bylaws to increase the number of authorized  positions on the Board
to ten (10).  The  Purchaser's  obligations  pursuant to this  Section 4.9 shall
cease at such time as the aggregate  number of shares of Purchaser  Common Stock
beneficially  owned by the Seller,  the Parent  Shareholders  and the respective
relatives and affiliates of the Seller and the Parent  Shareholders is less than
1,500,000 shares of Purchaser Common Stock (as adjusted for stock splits,  stock
dividends and the like).

     4.10. Employee Benefits.  For a period of not less than two years after the
Closing  Date and  subject to such  adjustments  as are  reasonably  required to
reflect local laws and commercial  customs  relating to employee  benefits,  the
Purchaser  shall,  and shall cause the Company and its  Subsidiaries to, provide
each  employee of the  Company and its  Subsidiaries  with  benefits,  including
health and welfare and paid-time off  benefits,  which either are  equivalent to
those currently provided by the Company or, if changed, are no less favorable in
the aggregate than those provided by the Purchaser to its existing  employees of
equal rank and seniority.  To the extent that any employee of the Company or any
of its Subsidiaries becomes eligible to participate in any employee benefit plan
of the Purchaser  after the Closing Date, the Purchaser  shall,  and shall cause
the Company and its Subsidiaries to: (i) credit such employee's service with the
Company or its  Subsidiaries  (to the same extent as such  service was  credited
under the similar  employee  benefit  plans of the Company and its  Subsidiaries
immediately  prior to the Closing Date) for purposes of determining  eligibility
to  participate  in and  vesting  under,  and for  purposes of  calculating  the
benefits  under,  such employee  benefit plan of the  Purchaser,  (ii) waive any
pre-existing condition limitations, waiting periods or similar limitations under
such employee benefit plan of the Purchaser and (iii) provide such employee with
credit  for any  co-payments  previously  made  and any  deductibles  previously
satisfied.

                                       26


     4.11. Indemnification.

          (a) For a period of at least seven years from the  Closing  Date,  the
Purchaser  shall,  and shall  cause the  Company  to,  fulfill  and honor in all
respects  all  rights  to  indemnification  existing  in  favor  of the  current
directors and officers of the Company (the "Indemnified  Parties"),  as provided
in the Company's  Articles of  Association  (as in effect as of the date of this
Agreement) and as provided in any indemnification agreements between the Company
and such Indemnified Parties (as in effect as of the date of this Agreement) and
as otherwise existing in favor of the Indemnified Parties; provided that nothing
contained  herein shall  obligate the Purchaser to maintain any  directors'  and
officers' liability insurance in favor of the Indemnified Parties.

          (b) Without  limiting the generality of the  foregoing,  the Purchaser
shall  ensure  that  adequate  funds are  available  (either  directly  from the
Purchaser or through the Company) to the Indemnified  Parties in order to ensure
that the indemnification  obligations referred to in this Section 4.11 are fully
satisfied. In the event any claim, action or proceeding is asserted or commenced
against any Indemnified  Party,  (1) after the Closing Date, the Purchaser shall
advance and pay the reasonable fees and expenses of any counsel retained by such
Indemnified Party in connection with such claim,  action or proceeding  promptly
after receipt of a request  therefor from such  Indemnified  Party,  and (2) the
Purchaser  shall  cooperate  with such  Indemnified  Party and such  Indemnified
Party's counsel,  and shall cause the Company to cooperate with such Indemnified
Party and such Indemnified Party's counsel, in the defense of such claim, action
or proceeding.

          (c)  This  Section  4.11  shall  survive  the   consummation   of  the
transactions  contemplated hereby, is intended to benefit and may be enforced by
the Indemnified  Parties,  and shall be binding on all successors and assigns of
the Purchaser and the Company.

          (d) The Purchaser shall pay all expenses,  including  attorneys' fees,
that may be incurred by any  Indemnified  Party in enforcing  the  indemnity and
other obligations provided for in this Section 4.11.

          (e)  Notwithstanding  any term or condition of this Section  4.11,  no
indemnification  shall  be made by the  Company  or the  Purchaser  pursuant  to
Section  4.11(a) (or pursuant to any  indemnification  agreement  or  instrument
referenced  in  Section  4.11(a))  to any  Indemnified  Party  if the  facts  or
circumstances  that would  otherwise give rise to such right of  indemnification
further  give  the  Purchaser  a  valid  and  meritorious  basis  for  obtaining
indemnification  (exclusive of the limits set forth in Sections 5.5, 5.6 and 5.7
hereof) under Article V hereof.


     4.12.  Compliance  with Chief  Scientist  Regulation.  The Purchaser  shall
provide any  undertakings  as are reasonably  required by the Chief Scientist of
the Ministry of Industry and Commerce  with regard to  maintaining  ownership of
the Company Intellectual  Property in the State of Israel and with regard to
such other  matters as are  reasonably  required by the Chief  Scientist  of the
Ministry of Industry and Commerce, in order to obtain the consent referred to in
Sections 7.4(a) and 8.3(b) hereof.

                                       27


     4.13. Section 338 Election. At or following the Closing, the Seller agrees,
if requested in writing by the  Purchaser,  to make an election  under  Internal
Revenue  Code  Section  338  ("Section  338  Election")   with  respect  to  the
transactions  contemplated hereby and to execute and deliver to the Company such
elections,  approvals and other  documents and to otherwise  take such action as
the Purchaser  shall  reasonably  request to effect the Section 338 Election for
U.S. income tax purposes.


                                   ARTICLE V

                            INDEMNIFICATION; REMEDIES


     5.1. Survival. All pre-Closing covenants of the parties shall terminate and
expire as of the Closing Date,  and all liability of the parties with respect to
such  covenants  shall  thereupon  be  extinguished.   All  representations  and
warranties contained in this Agreement (each as modified by the Company Schedule
and the Purchaser Schedule,  as the case may be, and any update or supplement to
the Company  Schedule or the  Purchaser  Schedule  delivered to Purchaser or the
Company,  as the case may be, as provided in this  Agreement)  shall survive the
Closing  until the  second  anniversary  of the  Closing  Date (the  "Expiration
Date"),  at which time such  representations  and warranties shall terminate and
expire and shall cease to be of any force or effect,  and all  liability  of the
parties with respect to such  representations  and warranties shall thereupon be
extinguished;  provided, however, that (i) if, prior to the Expiration Date, the
Purchaser  shall  have  duly  delivered  a Claim  Notice  to both  the  Seller's
Representative  and the Escrow Agent in  conformity  with all of the  applicable
procedures set forth in the Escrow  Agreement and in Section 5.7 hereof then the
specific  indemnification claim set forth in such Claim Notice shall survive the
Expiration Date (and shall not be extinguished  thereby),  and (ii) if, prior to
the  Expiration  Date, the Seller's  Representative  shall have duly delivered a
Claim  Notice  to the  Purchaser  in  conformity  with  all  of  the  applicable
procedures  set forth in Section 5.7 herof,  then the  specific  indemnification
claim set forth in such Claim  Notice  shall  survive the  Expiration  Date (and
shall not be extinguished thereby).

     5.2.   Indemnification  by  the  Seller.  Subject  to  the  limitations  on
indemnification  set forth in Sections  5.5, 5.6 and 5.7 hereof and elsewhere in
this Agreement,  from and after the Closing Date, the Seller shall,  from and to
the extent of the Escrow  Fund (as defined in the Escrow  Agreement),  indemnify
and hold harmless the Purchaser  and each of the Purchaser  Subsidiaries  (which
shall be deemed to include the Company  after the Closing  Date) and its agents,
representatives, employees, officers, directors, successors, controlling persons
and  affiliates  (in their  capacities as such)  (collectively,  the  "Purchaser
Indemnitees"),  and shall  reimburse  the Purchaser  Indemnitees,  for any loss,
liability,  damage, expense (including,  but not limited to, reasonable costs of
investigation  and  defense  and  reasonable  attorneys'  fees),  whether or not
involving  a  third-party  claim  (collectively,  "Damages"),  incurred  by  the
Purchaser  Indemnitees  as a  result  of  (a)  any  inaccuracy  in  any  of  the
representations and warranties of the Seller in Article II of this Agreement (as
modified by the Company  Schedule  and any update or  supplement  to the Company
Schedule  delivered to the  Purchaser  prior to the Closing Date but only to the
extent such update or supplement relates to events occurring or discovered after
the date of this  Agreement),  (b) any  failure of the  Company or the Seller to
perform or comply with any post-

                                       28



Closing  agreement or covenant to be performed or complied with by it under this
Agreement,  or (c) any claim by any person for  brokerage  or  finder's  fees or
similar  payments  in  connection  with  any  of the  transactions  contemplated
hereunder as the result of brokers,  finders or investment  bankers  retained by
the Company or the Seller or any Parent Shareholder.

     5.3.  Indemnification  by the  Purchaser.  Subject  to the  limitations  on
indemnification  set forth in Sections  5.5, 5.6 and 5.7 hereof and elsewhere in
this  Agreement,  from and after the Closing Date, the Purchaser shall indemnify
and hold harmless the Seller, the Parent Shareholders and the respective agents,
representatives, employees, officers, directors, successors, controlling persons
and affiliates of the Seller and the Parent Shareholders (in their capacities as
such) (the "Seller  Indemnitees"),  and shall reimburse the Seller  Indemnitees,
for  any  Damages  arising  as a  result  of (a)  any  inaccuracy  in any of the
representations and warranties of the Purchaser in Article III of this Agreement
(as  modified by the  Purchaser  Schedule  and any update or  supplement  to the
Purchaser  Schedule delivered to the Company and the Seller prior to the Closing
Date  but only to the  extent  such  update  or  supplement  relates  to  events
occurring or discovered  after the date of this  Agreement),  (b) any failure by
the Purchaser to perform or comply with any  post-Closing  agreement or covenant
to be performed or complied with by the Purchaser in this Agreement,  or (c) any
claim by any person for  brokerage  or  finder's  fees or  similar  payments  in
connection with any of the transactions  contemplated hereunder as the result of
brokers, finders or investment bankers retained by the Purchaser.

     5.4.   Notification;   Control  of  Proceedings.   The  party  entitled  to
indemnification  pursuant to this Article V  ("Indemnified  Party") shall,  with
reasonable   promptness,   give  to  the  party   obligated   to  provide   such
indemnification  hereunder  (an  "Indemnifying  Party")  written  notice  if the
Indemnified Party becomes aware of any loss, liability,  damage, or expense with
respect to which a claim for indemnification may be asserted; provided, however,
that for the sole purpose of determining whether written notice must be provided
to an  Indemnifying  Party  under  this  Section  5.4  (and for the  purpose  of
determining  whether  the  Indenmifying  Party  will  have the right to defend a
particular claim action or proceeding),  the limitation set forth in Section 5.5
hereof shall not be taken into account;  provided,  further,  however,  that the
failure of an Indemnified  Party to deliver such written notice with  reasonable
promptness  shall  not be  deemed to bar or  otherwise  limit the  rights of the
Indemnified Party hereunder unless such failure materially prejudices the rights
or defenses of the Indemnifying Party. If any claim is made by a third person or
an action or  proceeding  commenced for which the  Indemnified  Party shall seek
indemnity from the Indemnifying  Party, the Indemnified Party shall give to such
Indemnifying Party reasonable written notice of such claim, action or proceeding
and request the Indemnifying  Party to defend the same. The  Indemnifying  Party
shall  have the right to defend  such  claim,  action or  proceeding  at its own
expense,  and (if the  Indemnifying  Party  elects to accept the defense of such
claim,  action or proceeding) shall give written notice to the Indemnified Party
of the commencement of such defense with reasonable  promptness after the giving
of the written  notice of the claim,  action or  proceeding  by the  Indemnified
Party. The Indemnified Party shall be entitled to participate at its own expense
with  the  Indemnifying  Party  in such  defense  (subject  to the  right of the
Indemnifying  Party to control such  defense),  but shall not be entitled in any
way to release,  waive,  settle,  modify or pay such claim, action or proceeding
without the written consent of the  Indemnifying  Party (which consent shall not
be unreasonably  withheld),  if the Indemnifying Party has assumed such defense.
In the event the  Indemnifying  Party does not accept the defense of such claim,
action or proceeding, as provided above, or

                                       29



     does not notify the Indemnified Party of its election to defend such claim,
action, or proceeding,  within 30 days after the Indemnifying Party's receipt of
written notice of such claim, action, or proceeding, from the Indemnified Party,
the  Indemnified  Party shall have the full right to defend  against such claim,
action  or  proceeding  in  such  manner  as it may  deem  appropriate,  but the
Indemnifying  Party shall not have any liability  with respect to any compromise
or settlement  effected  without its prior written  consent (which consent shall
not be unreasonably  withheld). In the event the Indemnifying Party shall assume
the defense of such claim,  action,  or proceeding,  the Indemnified Party shall
cooperate in the defense of such claim,  action or proceeding and the records of
each shall be  available to the other with  respect to such  defense;  provided,
however,  that the  Indemnifying  Party  shall not,  in the  defense of any such
claim, action or proceeding,  consent to the entry of any judgment or enter into
any  settlement  where such entry of judgment or  settlement  does not include a
provision  releasing the  Indemnified  Party from all liability  with respect to
such claim,  action,  or  proceeding,  except  with the  written  consent of the
Indemnified Party (which consent shall not be unreasonably withheld).

     5.5.  Limitation  on  Indemnification.  Notwithstanding  the  provisions of
Sections  5.2 and 5.3  hereof,  no  Indemnifying  Party  shall be  liable to any
Indemnified  Party  with  respect  to:  (a) any  claim by an  Indemnified  Party
pursuant to clause (a) of Section 5.2 hereof or clause (a) of Section 5.3 hereof
except to the extent that the  cumulative  amount of the  indemnifiable  Damages
actually  incurred by the Indemnified  Party as a result of all  inaccuracies in
the  Indemnifying  Party's   representations  and  warranties  actually  exceeds
$250,000;  and the  Indemnifying  Party shall only be required to pay, and shall
only  be  liable  for,  the  amount  by  which  the  cumulative  amount  of  the
indemnifiable  Damages actually incurred by the Indemnified Party as a result of
all such inaccuracies in such  representations  and warranties  actually exceeds
$250,000;  or (b)  any  claim  based  on the  inaccuracy  of  any  warranty  and
representation of the Indemnifying Party if the Indemnified Party (or any of its
officers and directors in the case of an Indemnified Party that is a corporation
or a limited  liability  company) had actual knowledge of the inaccuracy of such
representation  and warranty (or of any facts or  circumstances  constituting or
resulting  in  such  inaccuracy)  prior  to the  Closing,  provided,  that,  the
limitation provided by this clause (b) shall not be available to an Indemnifying
Party  if  that  Indemnifying  Party  also  had  such  actual  knowledge  of the
inaccuracy of such representation and warranty (or of any facts or circumstances
constituting  or  resulting  in such  inaccuracy)  prior to the  signing of this
Agreement by the Indemnifying Party.


     5.6. Exclusive Remedy.


          (a) Except as  provided  in the  Parent  Shareholders  Agreement,  the
indemnification  provided for in this Article V shall be the exclusive right and
remedy with respect to any claim by an Indemnified  Party pursuant to clause (a)
of  Section  5.2  hereof or clause (a) of Section  5.3  hereof,  and,  except as
provided in this  Section  5.6, no claim or cause of action with  respect to any
misrepresentation or any inaccuracy,  breach or default as to any representation
or warranty  contained in Article II or Article III of this  Agreement  shall be
enforceable  unless made in accordance with the procedures,  and within the time
periods,  set forth in this Article V. Without  limiting the  generality  of the
foregoing,  and except as  provided in this  Section  5.6(a),  (i) any  payments
required to be made by the Seller under this Article V shall be made exclusively
from the Escrow Shares under the Escrow Agreement,  and the Purchaser shall have
no recourse against the Seller or

                                       30


the  Parent  Shareholders,  or  against  any of the  assets of the Seller or the
Parent Shareholders,  in connection with any indemnification claim, and (ii) any
payments  required to be made by the Purchaser  under this Article V (other than
for breaches occurring after the Closing of any covenant contained in Article I,
IV,  IX  or XI  hereof)  shall  be  limited  to an  aggregate  amount  equal  to
U.S.$16,540,000;

          (b)  Nothing  contained  in the Parent  Shareholders  Agreement  shall
require the Purchaser to first assert its rights and remedies under this Article
V or the Escrow Agreement or the Parent  Shareholders  Agreement as to any claim
by the  Purchaser  that is  based on the  inaccuracy  of any  representation  or
warranty in both this Agreement and the Parent  Shareholders  Agreement.  To the
extent that the Purchaser  shall first  recover  Damages from one or more of the
Parent Shareholders  pursuant to the Parent Shareholders  Agreement prior to any
recovery  pursuant to Article V of this Agreement or the Escrow  Agreement,  the
amounts recovered from such Parent Shareholder(s) shall be deducted from amounts
payable to the Purchaser  Indemnitees pursuant to Article V of this Agreement or
the Escrow Agreement.


     5.7. Indemnification Claims.


     (a) If an  Indemnified  Party  wishes to assert  an  indemnification  claim
against any Indemnifying  Party, the Indemnified Party shall deliver or cause to
be  delivered  to the entity or  entities  specified  below a written  notice (a
"Claim  Notice")  setting  forth (a) the  specific  representation,  warranty or
post-Closing  covenant alleged to have been breached by such Indemnifying Party,
(b) a summary of the facts and  circumstances  giving rise to the alleged breach
of such representation, warranty or post-Closing covenant, and (c) a description
of, and a  reasonable  estimate  of the total  amount of, the  Damages  actually
incurred or expected to be incurred by the Indemnified  Party as a direct result
of such alleged breach. If the Indemnified Party is a Purchaser Indemnitee, such
Purchaser Indemnitee shall deliver a copy of the Claim Notice  simultaneously to
the Seller's  Representative and the Escrow Agent. If the Indemnified Party is a
Seller  Indemnitee,  such Seller  Indemnitee  shall  deliver a copy of the Claim
Notice to the Purchaser.


          (b)  Notwithstanding  anything  to  the  contrary  contained  in  this
Agreement or in the Escrow Agreement, no Purchaser Indemnitee shall be permitted
to deliver any Claim  Notice (and no Purchaser  Indemnitee  shall be entitled to
assert any  indemnification  claim set forth in any Claim  Notice)  unless  such
Purchaser  Indemnitee  reasonably believes that a representation or warranty has
been  breached  by the Seller in a manner  that  would  entitle  such  Purchaser
Indemnitee to be indemnified under this Article V.


          (c)  Notwithstanding  anything  to  the  contrary  contained  in  this
Agreement,  no Seller  Indemnitee shall be permitted to deliver any Claim Notice
(and  none  of  the no  Seller  Indemnitee  shall  be  entitled  to  assert  any
indemnification  claim  set  forth  in any  Claim  Notice)  unless  such  Seller
Indemnitee  reasonably believes that a representation,  warranty or covenant has
been  breached  by the  Purchaser  in a manner  that would  entitle  such Seller
Indemnitee to be indemnified under this Article V.


          (d)  Notwithstanding  anything to the  contrary  contained  in this
Agreement,  if a Claim Notice shall not have been delivered to the  Indemnifying
Party (and, if the Indemnifying 

                                       31



Party is the Seller,  also to the Escrow  Agent) prior to the  Expiration  Date,
then such Claim Notice shall not be deemed to have been  delivered  and shall be
of no force or effect.

          (e)  Only  the   Purchaser   itself   shall  be   entitled  to  assert
indemnification  claims  against the Seller  under this Article V; any claim for
indemnification  by any  other  Purchaser  Indemnitee  must be  asserted  by the
Purchaser   on  behalf  of  such   Purchaser   Indemnitee.   Only  the  Seller's
Representative  (as defined  below) shall be entitled to assert  indemnification
claims against the Purchaser under this Article V; any claim for indemnification
by any Seller  Indemnitee  must be asserted by the  Seller's  Representative  on
behalf of such Seller Indemnitee.


          5.8.  Subrogation.  To the extent that any Indemnifying Party makes or
is required to make any indemnification payment to an Indemnified Party, (i) the
Indemnifying  Party shall be entitled to exercise,  and shall be subrogated  to,
any rights and remedies  (including rights of indemnity,  rights of contribution
and other rights of recovery) that the  Indemnified  Party or its affiliates may
have against any other person or entity (other than the Indemnified Party or its
affiliates)  with respect to any Damages,  circumstances or matter to which such
indemnification  payment is directly or indirectly related; (ii) the Indemnified
Party shall  permit the  Indemnifying  Party to use the name of the  Indemnified
Party  or the  Indemnified  Party's  affiliates,  in any  transaction  or in any
proceeding or other matter  involving any of such rights or remedies;  and (iii)
the Indemnified  Party shall take and shall cause each of its affiliates to take
such actions as the Indemnifying Party may reasonably request for the purpose of
enabling the Indemnifying Party to perfect or exercise the Indemnifying  Party's
right  of  subrogation  hereunder.  Any  rights  of  an  Indemnifying  Party  to
subrogation  pursuant to this  Section 5.8 shall not be  exercisable  until such
Indemnifying  Party shall have fully performed its obligations  pursuant to this
Article V as to the  indemnification  of the Indemnified  Party (with respect to
the particular indemnification claim involved);  provided,  however, that, prior
to the full  performance of such  indemnification  obligations and to the extent
reasonably  required  to  preserve  the  rights  of the  Indemnifying  Party  to
subrogation,  the  Indemnifying  Party shall be  permitted to take any action so
required to preserve such subrogation rights.


     5.9. Seller's Representative.


     (a) Zeev  May  shall  be  constituted  and  appointed  as agent  ("Seller's
Representative")  for and on behalf of the Seller and the Parent Shareholders to
give and receive  notices and  communications,  to authorize the Escrow Agent to
deliver funds out of escrow to the Purchaser, to agree to, negotiate, enter into
settlements and compromises of, and demand arbitration and comply with orders of
courts and awards of arbitrators with respect to indemnification  claims, and to
take all actions  necessary  or  appropriate  in the  judgment  of the  Seller's
Representative  for the  accomplishment  of the  foregoing.  Such  agency may be
changed  from time to time upon not less than five days'  prior  written  notice
from the Seller or, if the Seller  has been  liquidated,  from any three  Parent
Shareholders,  to the  Purchaser.  Notices  or  communications  to or  from  the
Seller's Representative shall constitute notice to or from the Seller.

     (b) The Seller's Representative shall have reasonable access to information
about the  Company  and the  assistance  of the  Seller  and the  Purchaser  for
purposes of performing his duties and exercising his rights hereunder,  provided
that the Seller's Representative shall treat

                                       32



confidentially  and not disclose to anyone (other than the Seller and the Parent
Shareholders) any priorietory  nonpublic information obtained from the Purchaser
after the Closing to the extent  such  proprietory  information  belongs to, and
relates to the conduct of the business of, the Company; provided,  however, that
the Seller's Representative may disclose such proprietary information:  (i) on a
need to know  basis  to  individuals  who  agree,  in  writing,  to  treat  such
information as confidential, and (ii) as required by law or regulation.


     (c) A decision,  act, consent or instruction of the Seller's Representative
shall  constitute a decision of the Seller or the Parent  Shareholders and shall
be final,  binding and  conclusive  upon the Seller and the  Purchaser,  and the
Escrow   Agent  may  rely  upon  any  written   instruction   of  the   Seller's
Representative as being the decision, act, consent or instruction of the Seller.
The  Purchaser is hereby  relieved from any liability to any person for any acts
done  by it in  accordance  with  such  written  instructions  of  the  Seller's
Representative.


                                   ARTICLE VI

            CONDITIONS TO OBLIGATIONS OF THE PURCHASER AND THE SELLER


               The obligations of the Purchaser and the Seller to consummate the
stock  purchase  contemplated  by this  Agreement  on the Closing  Date shall be
subject to the  satisfaction  of the following  condition,  except to the extent
such condition is waived in writing by the Purchaser and the Seller:

     6.1.  Government  Approvals.   All  requisite  governmental  approvals  and
authorizations necessary for the consummation of the stock purchase contemplated
hereby  shall have been duly  issued or  granted,  except  where the  failure to
obtain  such  approvals  and  authorizations  would not have a Material  Adverse
Effect on the Purchaser. No unfavorable governmental decree or court order shall
exist that would prevent the consummation of the stock purchase  contemplated by
this Agreement.


                                   ARTICLE VII

                   CONDITIONS TO OBLIGATIONS OF THE PURCHASER

          The   obligation  of  Purchaser  to  consummate   the  stock  purchase
contemplated  by this  Agreement  on the  Closing  Date  shall be subject to the
following  conditions,  except to the extent such  conditions  are waived by the
Purchaser in writing:

     7.1. Representations and Warranties;  Performance.  The representations and
warranties  of  the  Seller  set  forth  in  this   Agreement   (excluding   any
representation  or  warranty  that  refers  specifically  to  "the  date of this
Agreement,"  "the date  hereof" or any other date other than the  Closing  Date)
shall be accurate in all material  respects as of the Closing Date as if made on
and  as of  the  Closing  Date  (it  being  understood  that,  for  purposes  of
determining  the  accuracy  of such  representations  and  warranties  as of the
Closing Date (i) any inaccuracies that, in the aggregate, do not have a Material
Adverse Effect on the Company shall be disregarded, (ii) any inaccuracy that

                                       33


results  from or relates to general  business,  economic or industry  conditions
shall be  disregarded,  and (iii) any inaccuracy that results from or relates to
the taking of any action  contemplated  or  permitted  by this  Agreement or the
announcement  or pendency of the  transactions  contemplated  by this  Agreement
shall be disregarded).  The Seller and the Company shall have each performed and
complied in all material  respects with all agreements or covenants  required by
this  Agreement to be performed or complied  with by such parties prior to or at
the Closing  (except  where the failure to have  performed or complied with such
agreements  would not have a Material  Adverse  Effect on the  Purchaser  or the
Company).


     7.2.  Amendments to Employment  Agreements.  Each of the Individual  Parent
Shareholders  shall have entered into an amendment to his  Employment  Agreement
with the Company substantially in the form set forth on Exhibit 7.2 hereto.


     7.3.  Opinion of Counsel.  The Purchaser  shall have received an opinion of
Advocate,  Zeev May, counsel to the Company and the Seller, in substantially the
form of Exhibit 7.3 hereto.


     7.4. Approvals. The following approvals,  orders or permits shall have been
received in form and substance reasonably satisfactory to the Purchaser:


          (a) Israel Chief Scientist. Approval of the Chief Scientist for change
in control of the Company; and

          (b) Israel  Investment  Center.  Approval of the Investment Center for
change in control of the Company.

     7.5. Escrow Agreement.  The Escrow Agent, the Seller's  Representative  and
the Seller shall have executed and delivered the Escrow Agreement.

     7.6.  Seller's  Agreement.  The Seller and each of the Parent  Shareholders
shall have  executed and  delivered  to the  Purchaser  the  Seller's Agreement.

     7.7.  Parent  Shareholders   Indemnity   Agreement.   Each  of  the  Parent
Shareholders  shall  have  executed  and  delivered  to the  Purchaser  a Parent
Shareholders Indemnity Agreement  substantially in the form set forth on Exhibit
7.7 hereto (the "Parent Shareholders Agreement").

     7.8. No Litigation.  No material  action or proceeding by any  governmental
authority in the United States or the State of Israel that  challenges the stock
purchase  contemplated  by this Agreement shall be pending against the Purchaser
or the Company.

     7.9. Change in Condition. Since the date of this Agreement, there shall not
be any change in the  Company's  financial  condition  or results of  operations
which has had or would  reasonably be expected to have a Material Adverse Effect
on the Company; provided,  however, that any change that results from or relates
to general business,  economic or industry conditions,  the taking of any action
contemplated  or permitted by this Agreement or the  announcement or 

                                       34


pendency of the  transactions  contemplated by this Agreement shall not be taken
into  account  in  determining  whether  there has been or would  reasonably  be
expected to be a "Material Adverse Effect" on the Company.

     7.10.  Resignations.  All directors of the Company and its Subsidiaries and
Holdings  shall have  executed and delivered to the  Purchaser  resignations  as
directors.


                                   ARTICLE VIII

                     CONDITIONS TO OBLIGATIONS OF THE SELLER


         The  obligations  of  the  Seller  to  consummate  the  stock  purchase
contemplated  by this  Agreement  on the  Closing  Date  shall be subject to the
following  conditions,  except to the extent such  conditions  are waived by the
Seller in writing:


     8.1. Representations and Warranties;  Performance.  The representations and
warranties  of  the  Purchaser  set  forth  in  this  Agreement  (excluding  any
representation  or  warranty  that  refers  specifically  to  "the  date of this
Agreement,"  "the date  hereof" or any other date other than the  Closing  Date)
shall be accurate in all material  respects as of the Closing Date as if made on
and  as of  the  Closing  Date  (it  being  understood  that,  for  purposes  of
determining  the  accuracy  of such  representations  and  warranties  as of the
Closing Date (i) any inaccuracy that does not have a Material  Adverse Effect on
the Purchaser  shall be  disregarded,  (ii) any inaccuracy  that results from or
relates  to  general  business,   economic  or  industry   conditions  shall  be
disregarded, and (iii) any inaccuracy that results from or relates to the taking
of any action contemplated or permitted by this Agreement or the announcement or
pendency  of  the   transactions   contemplated   by  this  Agreement  shall  be
disregarded).  The Purchaser  shall have  performed and complied in all material
respects  with all  agreements  or  covenants  required by this  Agreement to be
performed or complied with by it prior to or at the Closing.  Without limitation
of the foregoing,  the Seller shall have received the cash amount referred to in
Section  1.4(b)(ii)(A)  hereof and the shares of Purchaser Common Stock referred
to in Section 1.4(b)(ii)(B) hereof, and the Escrow Agent shall have received the
shares of Purchaser Common Stock referred to in Section 1.4(b)(ii)(C) hereof.


     8.2.  Opinion of  Counsel.  The Seller  shall have  received  an opinion of
Morrison & Foerster LLP, counsel to the Purchaser,  in substantially the form of
Exhibit 8.2 hereto.

     8.3. Approvals. The following approvals, orders and permits shall have been
received in form and substance reasonably satisfactory to the Company:


          (a) Bank of  Israel.  Bank of  Israel  permit  (i) for the  Seller  to
exchange  the  Transferred  Company  Shares  and  Holdings  Shares for shares of
Purchaser  Common Stock and to hold shares of Purchaser  Common Stock,  and (ii)
for the  Seller  and the Parent  Shareholders  to deposit in a foreign  currency
deposit account ("PAMACH") the consideration received from the sale of shares of
Purchaser Common Stock;


          (b) Israel Chief  Scientist.  Approval of the Chief  Scientist for the
change in control of the Company; and

                                       35


          (c) Israel  Investment  Center.  Approval of the Investment Center for
the change in control of the Company.

     8.4.  Escrow  Agreement.  The  Escrow  Agent and the  Purchaser  shall have
executed and delivered to the Seller and the Seller's  Representative the Escrow
Agreement.

     8.5. Seller's Agreement. The Purchaser shall have executed and delivered to
the Seller and the Parent Shareholders the Seller's Agreement.


     8.6. No Litigation.  No material  action or proceeding by any  governmental
authority in the United States or the State of Israel that  challenges the stock
purchase contemplated by this Agreement shall be pending against the Seller, the
Company or any of the Parent Shareholders.

     8.7. Change in Condition. Since the date of this Agreement, there shall not
be any change in the  Purchaser's  financial  condition or results of operations
which has had or would  reasonably be expected to have a Material Adverse Effect
on the  Purchaser;  provided,  however,  that any change  that  results  from or
relates to general business,  economic or industry conditions, the taking of any
action  contemplated  or permitted  by this  Agreement  or the  announcement  or
pendency of the  transactions  contemplated by this Agreement shall not be taken
into  account  in  determining  whether  there has been or would  reasonably  be
expected to be a "Material Adverse Effect" on the Purchaser.



                                   ARTICLE IX

                                FEES AND EXPENSES


     9.1. Expenses. Each of the Company, the Purchaser and the Seller shall bear
its own expenses incurred in connection with the negotiation and consummation of
the transactions contemplated by this Agreement;  provided, however, that if the
Closing takes place, (i) the Purchaser shall pay $1,701,230 of any such expenses
payable by the Company to Hambrecht & Quist LLC and payable to the Seller's U.S.
attorneys,  (ii) the Company shall pay $200,000 of other transaction expenses of
the Seller  and/or the  Company,  and (iii) the Seller  shall pay all  remaining
transaction expenses of the Company.



                                    ARTICLE X

                                   TERMINATION

     10.1.  Termination  of  Agreement.  This  Agreement  and  the  transactions
contemplated  hereby may be  terminated  at any time before the Closing Date, as
follows, and in no other manner:

          (a) by written consent of the Purchaser, the Company and the Seller;


                                       36


          (b) by the  Purchaser,  the Company or the Seller if the Closing shall
not have  occurred on or before 5:00 p.m.,  Tel Aviv Time, on September 9, 1997;
provided that the right to terminate this Agreement  under this Section  10.1(b)
shall not be  available  to any party whose  failure to fulfill  any  obligation
under this  Agreement  has been the cause of, or results  in, the failure of the
Closing to have occurred by such time;


          (c) by the Purchaser,  if (i) there has been a material  breach of any
representation,  warranty,  covenant or agreement contained in this Agreement on
the part of the Seller such that the  conditions set forth in Section 7.1 hereof
could not be  satisfied,  and (ii) such breach has not been cured within  thirty
(30) days after the delivery to the Seller by the Purchaser of written notice of
such breach; provided, however, that the right to terminate this Agreement under
this Section  10.1(c)  shall not be available to the  Purchaser if the Purchaser
shall have materially breached this Agreement;


          (d) by the  Company  or the  Seller if (i)  there has been a  material
breach of any representation,  warranty, covenant or agreement contained in this
Agreement on the part of the  Purchaser  such that the  conditions  set forth in
Section  8.1 hereof  could not be  satisfied,  and (ii) such breach has not been
cured within  thirty (30) days after the delivery to the Purchaser by the Seller
of written notice of such breach; provided, however, that the right to terminate
this Agreement  under this Section 10.1(d) shall not be available to the Company
or the Seller if the Company or the Seller shall have  materially  breached this
Agreement; or


          (e) by the Purchaser,  the Company or the Seller if (i) there shall be
a final,  non-appealable  order or temporary order (which  temporary order shall
only  provide a basis for  termination  if not  reversed,  vacated or  otherwise
expired  prior  to  September  9,  1997)  of  any  court  in  effect  preventing
consummation of the  transaction,  or (ii) there shall be any action taken after
the date of this Agreement,  or any statute,  rule, regulation or order enacted,
promulgated  or issued by any  governmental  entity and  reasonably  determined,
after the date of this Agreement,  to be applicable to the stock purchase herein
contemplated which would make such stock purchase illegal.


     10.2.  Effect  of  Termination.  In the  event  of a  termination  of  this
Agreement by any party  pursuant to Section 10.1,  this  Agreement  shall become
void and have no effect,  and there shall be no  obligations or liability on the
part of any party or their respective officers and directors, except (a) Article
XI hereof shall survive the termination of this Agreement and (b) nothing herein
shall relieve any party from  liability for any willful breach of this Agreement
or any  representation  or warranty  contained  herein.  No  termination of this
Agreement  shall  affect  the  obligations  of  the  parties  contained  in  the
Confidentiality Agreement, which shall survive any termination of this Agreement
in accordance with its terms.



                                   ARTICLE XI

                                  MISCELLANEOUS

     11.1.    Time of the Essence.  Time is of the essence of this Agreement.


                                       37



     11.2.  Entire  Agreement.  This Agreement and the other written  agreements
contemplated  or described  herein  contain the entire  agreement of the parties
hereto,  and  supersede  any  prior  written  or oral  agreements  between  them
concerning  the  subject  matter  contained  herein  and  therein.  There are no
representations,  agreements,  arrangements or understandings,  oral or written,
between  the  parties  to this  Agreement  and such  other  written  agreements,
relating to the subject  matter  contained in this  Agreement  and in such other
written agreements, which are not fully expressed herein and therein.


     11.3.  Press Releases and Public  Announcements.  None of the Company,  the
Seller  and the  Purchaser  shall  issue any press  release  or make any  public
announcement  concerning the matters set forth in this Agreement  (other than as
required by applicable disclosure rules or regulations of any governmental body)
without  the  consent of the other  party.  If any party  hereto is  required by
disclosure  rules  or  regulations  to  issue a press  release  or make a public
announcement  concerning  the  matters set forth in this  Agreement,  such party
shall provide  notice to the other parties of such rule or regulation  and shall
consult with such other  parties  prior to issuing such press  release or making
such  public  announcement.  The  Company,  the  Seller and the  Purchaser  will
cooperate to jointly  prepare and issue any press release which may be issued to
announce  the signing of this  Agreement  and/or the Closing of the  transaction
contemplated by this Agreement.

     11.4.  Counterparts.  This  Agreement  may be  executed  in any  number  of
counterparts,  each of which shall be deemed an original  but all of which shall
constitute one and the same instrument.

     11.5.  Descriptive  Headings.  The  Article  and  Section  headings in this
Agreement  are for  convenience  only and  shall  not  affect  the  meanings  or
construction of any provision of this Agreement.

     11.6.  Notices.  Any notices  required or  permitted to be given under this
Agreement  shall be in writing and shall be deemed  sufficiently  given (a) when
delivered in person,  (b) three  business days after  delivery to an "overnight"
courier,  (c) 24 hours after delivery by facsimile  transmission  (to the extent
receipt  of such  facsimile  is  evidenced  by a  transmission  report  or other
reasonable evidence of the successful and accurate transmission of such notice),
in each case addressed as follows:

         If to the Purchaser:      Cylink Corporation                   
`                                  910 Hermosa Court
                                   Sunnyvale, California 94086
                                   Attention:     Robert F. Fougner
                                   Fax: (408) 774-4952
                                  
         With a copy to:           Morrison & Foerster LLP
                                   755 Page Mill Road
                                   Palo Alto, California  94304-1018
                                   Attention:   Michael C. Phillips
                                  
                                         38
                                  
                            
                                  
                                   Fax: (650) 494-0792
                                  
         With a further copy to:   I. Fischer & Co.
                                   3 Daniel Frisch Street
                                   Tel Aviv, Israel
                                   Attention: Ezra Katzen
                                   Fax: 972-3-525-0141
                                  
                                  
         And if to the Seller:     A.R. Data Security Ltd.          
                                   c/o Algorithmic Research Ltd.
                                   15 Gush Etzion Street
                                   Givat Shmuel, Israel
                                   Attention: Yossi Tulpan
                                   Fax: 972-3-532-2650
                                   
                                   
         With a copy to:           Cooley Godward LLP
                                   Five Palo Alto Square
                                   3000 El Camino Real
                                   Palo Alto, California 94306
                                   Attention: Richard E. Climan
                                              Keith A. Flaum
                                   Fax: (650) 857-0663
                                  
         With a further copy to:   Shinar, Shachor, Weissberger
                                   5 Beit Hillel St., 3rd Floor
                                   Tel Aviv 67017, Israel
                                   Attention: Doron Shinar
                                   Fax: 972-3-562-1905
                                  
                                
or to  such  other  address  or  addresses  as a  party  shall  have  previously
designated by notice to the sender given in accordance with this Section.


     11.7.  Choice of Law;  Arbitration.  This  Agreement  shall be construed in
accordance  with and  governed  by the laws of the State of  California,  except
insofar  as Israeli  corporate  laws,  securities  laws or tax laws apply to the
Company, its Israeli Subsidiaries, the Seller, their governance, and issuance of
securities.  Any dispute  arising out of or relating to this Agreement  shall be
resolved  through  binding  arbitration  under  the  Rules of  Conciliation  and
Arbitration  of the  International  Chamber  of  Commerce.  The  venue  for such
arbitration  proceedings  shall be London,  England.  The arbitrator's  fees and
other related  expenses of any  arbitation  (such as  transcript  fees) shall be
borne by the Seller and the Purchaser in such proportions as shall be determined
by the  arbitrator,  or if there is no such  determination,  such fees and other
related  expenses  shall be borne equally by the Seller and the  Purchaser.  The
resolution of a dispute by the  arbitrator  shall be conclusive and binding upon
the  parties  hereto and  judgment  may be entered  thereon in any court  having
jurisdiction  thereof.  The arbitrator shall have the authority to make an award
of actual compensatory damages incurred by a party in connection with a dispute,
but shall  have no right to grant  special,  punitive  or  exemplary  damages or
indirect or consequential damages or to grant any form of equitable relief.

                                       39



     11.8. Binding Effect;  Benefits.  This Agreement shall inure to the benefit
of and be binding upon the parties and their respective successors and permitted
assigns. Nothing in this Agreement, express or implied, is intended to confer on
any person other than the parties or their  respective  successors and permitted
assigns any rights,  remedies,  obligations or liabilities under or by reason of
this  Agreement,  except that the provisions of Sections 4.9 and 4.11 hereof and
Article V hereof are  intended  to confer  rights and  remedies  on the  persons
referred to therein.

     11.9. Assignability.  Neither this Agreement nor any of the parties' rights
hereunder  shall be assignable by any party without the prior written consent of
the other  parties and any  attempted  assignment  without such consent shall be
void; provided, however, that this Agreement may be assigned by the Purchaser to
an  affiliate of the  Purchaser  which shall have been formed for the purpose of
consummating the transactions  contemplated hereby, but no such assignment shall
relieve the Purchaser of any of its obligations under this Agreement.

     11.10. Waiver and Amendment. Any term or provision of this Agreement may be
waived at any time by the party which is entitled to the benefits  thereof.  The
waiver by any party of a breach of any  provision  of this  Agreement  shall not
operate or be construed as a waiver of any subsequent  breach.  The parties may,
by mutual agreement in writing,  amend this Agreement in any respect without the
consent or approval of any other person  (including any other beneficiary of any
rights or remedies under this Agreement).

     11.11  Attorneys' Fees. In the event of any action or proceeding to enforce
the terms and  conditions  of this  Agreement,  the  prevailing  party  shall be
entitled to an award of reasonable  attorneys'  and experts' fees and costs,  in
addition to such other relief as may be granted.

     11.12. Knowledge.  For  purposes of this  Agreement,  any  reference to the
"knowledge" of the Purchaser shall mean the actual  knowledge of Fernand Sarrat,
John V. Kalb or Robert B. Fougner of (i) an actual inaccuracy in any warranty or
representation of the Purchaser that is subject to a "knowledge"  qualification,
or (ii) facts or  circumstances  that would reasonably be expected to constitute
or to have given rise to an inaccuracy  in any such warranty or  representation.
For purposes of this Agreement,  any reference to the "knowledge" of the Company
shall mean the actual knowledge of Amos Fiat, Yossi Tulpan or Yossi Cohen of (i)
an actual  inaccuracy in any warranty or  representation  of the Company that is
subject to a  "knowledge"  qualification,  or (ii) facts or  circumstances  that
would  reasonably  be  expected  to  constitute  or to  have  given  rise  to an
inaccuracy in any such warranty or representation.

     11.13.  Other   Definitions.   "Material  Adverse  Effect,"  when  used  in
connection with the Company,  means any effect that is materially adverse to the
business or financial condition of the Company and its Subsidiaries,  taken as a
whole;  provided,  however,  that (i) any adverse  effect that  results  from or
relates to general business, economic or industry conditions shall not be deemed
to constitute,  and shall not be taken into account in determining whether there
has been, a "Material  Adverse  Effect" on or with  respect to the Company,  and
(ii) any adverse effect that results from or relates to the taking of any action
contemplated  or permitted by this Agreement or the  announcement or pendency of
the  transactions  contemplated  by  this  Agreement  shall  not  be  deemed  to
constitute, and shall not be taken into account in determining whether there has
been, a

                                       40


"Material  Adverse Effect" on or with respect to the Company.  "Material Adverse
Effect," when used in connection  with the  Purchaser,  means any effect that is
materially  adverse to the business or financial  condition of the Purchaser and
the Purchaser  Subsidiaries,  taken as a whole; provided,  however, that (i) any
adverse  effect that  results from or relates to general  business,  economic or
industry  conditions  shall not be deemed to constitute,  and shall not be taken
into account in determining  whether there has been, a "Material Adverse Effect"
on or with respect to the  Purchaser,  and (ii) any adverse  effect that results
from or relates to the taking of any action  contemplated  or  permitted by this
Agreement or the  announcement or pendency of the  transactions  contemplated by
this Agreement  shall not be deemed to  constitute,  and shall not be taken into
account in determining whether there has been, a "Material Adverse Effect" on or
with  respect to the  Purchaser  . An  "agreement,"  "arrangement,"  "contract,"
"commitment,"  "plan,"  "understanding,"  or  "undertaking"  when  used  in this
Agreement shall mean a legally binding, written or oral agreement,  arrangement,
contract, commitment, plan, purchase order, understanding or undertaking, as the
case may be.

     11.14. No Implied Representations. The Purchaser and the Seller acknowledge
that,  except as expressly provided in Articles II and III hereof, and except as
expressly  provided in any agreement executed and delivered by a party hereto to
any other party hereto pursuant to this Agreement,  none of the parties has made
or is making any representations or warranties whatsoever, implied or otherwise.
Without  limiting the generality of the foregoing,  none of the parties has made
or is making any  representations  or warranties with respect to any information
or documents made available by a party or its  representatives  to another party
or its  representatives,  except as  expressly  covered by a  representation  or
warranty  in Articles II or III hereof or in any other  agreement  executed  and
delivered by a party to another party pursuant to this Agreement.

     11.15.  Liquidation of the Seller.  The Purchaser  acknowledges  and agrees
that  nothing  contained  in this  Agreement  or in any  document  delivered  in
connection with the transactions contemplated hereby shall be construed or shall
operate to prevent  the Seller  from  dissolving,  winding  up,  liquidating  or
terminating  its  existence  at any  time  after  the  Closing.  Notwithstanding
anything  to the  contrary  contained  in this  Agreement,  in the  event of the
dissolution  or  liquidation of the Seller,  the Parent  Shareholders  and their
successors  and assigns  shall succeed to, and shall be entitled to exercise and
enforce,  all of the rights of the Seller  under  this  Agreement  and the other
documents delivered in connection with the transactions contemplated hereby. The
Parent Shareholders will, as a condition to such dissolution and liquidation, be
bound by Sections 1.2(b), 4.7, 4.13, 9.1, 11.3, 11.6, and 11.7 of this Agreement
as, and only to the extent,  provided  in Section 10 of the Parent  Shareholders
Agreement.

     11.16.  Post-Closing  Access.  At all times  after the  Closing  Date,  the
Purchaser  shall  give the  Seller and the  Seller's  Representative  reasonable
access to the books and  records of the  Company  and its  Subsidiaries  (to the
extent such books and records  relate to the period prior to the Closing  Date),
and the Purchaser shall cause such books and records to be retained for a period
of at least seven years following the Closing.


                                       41


         IN WITNESS  WHEREOF,  this  Agreement  has been executed by the parties
hereto as of the day and year first above written.

                       PURCHASER:

                       Cylink Corporation


                       By: /s/ John V. Kalb, Jr.
                           ---------------------------------
                               John V. Kalb, Jr.
                               Vice President, Strategy and Development

                       THE COMPANY:

                       Algorithmic Research Ltd.

                       By: /s/ Yossi Tulpan
                           ---------------------------------
                               Yossi Tulpan
                               Chief Executive Officer

                       By: /s/ Yossi Cohen
                           ---------------------------------
                               Yossi Cohen
                               Chief Operating Officer
                                   


                       THE SELLER:

                       A.R. Data Security Ltd.

                       By: /s/ Yossi Tulpan
                           ---------------------------------
                               Yossi Tulpan
                               Director

                       By: /s/ Yossi Cohen
                           ---------------------------------
                               Yossi Cohen
                               Director

                       By: /s/ Amos Fiat
                           ---------------------------------
                               Amos Fiat
                               Director

                       By: /s/ Oded Koritshoner
                           ---------------------------------
                               Oded Koritshoner
                               Director

                       By: /s/ Zohar Tal
                           ---------------------------------
                               Zohar Tal
                               Director

                                       42