Exhibit 2.1

                             DATED FEBRUARY 4, 2005


                                     BETWEEN


                     VASCO DATA SECURITY INTERNATIONAL, INC.

                                 (as Purchaser)

                                AOS HOLDING B.V.

                                   (as Seller)

                               FILIPAN BEHEER B.V.

                                 (as Guarantor)

                               MR. MLADEN FILIPAN

                                   (as Surety)

                             PIJNENBURG BEHEER N.V.

                                 (as Guarantor)








                        ---------------------------------

                        SHARE SALE AND PURCHASE AGREEMENT

                        ---------------------------------


                         Baker & McKenzie Amsterdam N.V.
                               1017 PS Leidseplein
                           Amsterdam, The Netherlands
                               Tel: +31-20-5517555
                               Fax: +31-20-6267949






THIS SHARE SALE AND PURCHASE  AGREEMENT is made on this 4th day of February 2005
(the "AGREEMENT")

Between:


(1)      VASCO DATA SECURITY INTERNATIONAL, INC., a Delaware corporation, United
         States of America  with its  principal  place of business at 1901 South
         Meyers Road, Oakbrook Terrace, Illinois 60181, United States of America
         (the "PURCHASER");

(2)      A.O.S.  HOLDING B.V., a private limited liability company organized and
         existing under the laws of The Netherlands  with its registered  office
         in `s Hertogenbosch  and its principal place of business at De Tweeling
         20A, (5215 MC) `s Hertogenbosch, The Netherlands (the "SELLER");

(3)      FILIPAN BEHEER B.V., a private limited  liability company organized and
         existing under the laws of the Netherlands  with its registered  office
         at (5492 BK) Emmausstraat 11, Sint Oedenrode, The Netherlands ("FILIPAN
         BEHEER");

(4)      MR.  MLADEN  FILIPAN,  a  private  individual  residing  at  (5492  BK)
         Emmausstraat 11, Sint Oedenrode,  The  Netherlands,  being the ultimate
         beneficial owner of Art of Security B.V. ("FILIPAN"); and

(5)      PIJNENBURG  BEHEER N.V., a private limited  liability company organized
         and  existing  under the laws of The  Netherlands  with its  registered
         office at (5261 NE) Boxtelseweg 70, Vught,  being the sole  shareholder
         of C.P.S. International B.V. ("PIJNENBURG BEHEER NV").


WHEREAS:

(A)      The Seller is the legal and beneficial owner of the entire issued share
         capital of A.O.S.  Hagenuk B.V., a private  limited  liability  company
         organized  and  existing  under  the laws of The  Netherlands  with its
         registered  office  at  `s  Hertogenbosch,   The  Netherlands  and  its
         principal   place  of  business  at  (5215  MC)  De  Tweeling  20A,  `s
         Hertogenbosch, The Netherlands ("COMPANY").

(B)      The Company is in the  business of the  development  and  marketing  of
         authentication,  verification and IT security software and applications
         therefor, including smart card activities;

(C)      The  Purchaser  designs,   develops,   markets  and  supports  patented
         "Identity Authentication" products for e-business and e-commerce;

(D)      The Seller and the Purchaser have agreed that the Seller shall sell and
         transfer to the Purchaser and the Purchaser  shall purchase and acquire
         from  Seller 100% of the total  issued  share  capital of the  Company,
         consisting of 180 shares,  nominal value EUR 100 per share,  numbered 1
         to 180 (collectively:  "SHARES") for the Consideration and on the terms
         and subject to the conditions contained in this Agreement;

                                                                               2


THEREFORE IT IS HEREBY AGREED AS FOLLOWS:


                   ARTICLE 1 - DEFINITIONS AND INTERPRETATION
                   ------------------------------------------

1.1      DEFINITIONS.  In this Agreement,  unless the context otherwise requires
         the  words  and  expressions  used in this  Agreement  shall  have  the
         meanings set out in SCHEDULE 1.

1.2      HEADINGS.  Headings  are inserted  for  convenience  only and shall not
         affect the construction of this Agreement.


                   ARTICLE 2 - SALE AND PURCHASE OF THE SHARES
                   -------------------------------------------

2.1      SALE  AND  PURCHASE.  The  Seller  hereby,  subject  to the  terms  and
         conditions  of the  Agreement,  sells  ("VERKOOPT")  the  Shares to the
         Purchaser,   and  the  Purchaser  hereby,  subject  to  the  terms  and
         conditions of this Agreement,  purchases  ("KOOPT") the Shares from the
         Seller.

2.2      TRANSFERS.  At Closing,  the Seller agrees to transfer  ("LEVEREN")  to
         Purchaser the Shares and the Purchaser agrees to accept the transfer of
         the Shares from the Seller.


                    ARTICLE 3 - CONSIDERATION AND ADJUSTMENT
                    ----------------------------------------

3.1      CONSIDERATION.   The  consideration  for  the  Shares  payable  by  the
         Purchaser to the Seller ("CONSIDERATION") shall consist of:

         (i)      the payment of a cash amount of EUR 3,750,000  (Three  million
                  seven hundred and fifty thousand Euros) adjusted to (a) add or
                  subtract  the  amounts  required  to  settle  any  outstanding
                  balances due from or due to Related  Parties as of the Closing
                  Date and (b) add or subtract the amount by which the Company's
                  tangible  net equity  (defined to be total net equity less net
                  intangible  assets) as of January 31, 2005 as reflected in the
                  Financial   Statements   as  defined  in  EXHIBIT  4  is  less
                  respectively  more than EUR 85,000  (the net result of all the
                  foregoing, the "CONSIDERATION CASH");

         (ii)     the  issuance to Seller of shares of common  stock,  par value
                  $.001 per share,  of the Purchaser  ("CONSIDERATION  SHARES"),
                  calculated in accordance with Articles 3.3 and 3.4 below; and

         (iii)    a variable  amount  related to the gross profits  collected on
                  sales of POS  equipment  to VISA for the  Latin/South  America
                  markets  for a  period  of two  years  after  Closing  ("GROSS
                  PROFITS") ("EARN OUT CONSIDERATION"), calculated in accordance
                  with Article 5.

3.2      CLOSING  CONSIDERATION.  The consideration payable at Closing ("CLOSING
         CONSIDERATION"),  which shall consist of the Consideration Cash and the
         Closing  Consideration Shares, shall at Closing be EUR 5,000,0000 (five
         million Euros) adjusted as set forth in Article 3.1.(i), if any.

                                                                               3


3.3      CLOSING CONSIDERATION SHARES. The number of Consideration Shares issued
         to Seller on the Closing Date ("CLOSING  CONSIDERATION SHARES") will be
         equal to EUR 1,250,000  divided by the Initial Value. The Initial Value
         will be  measured  five (5)  business  days prior to the  Closing  Date
         ("MEASUREMENT  DATE")  and be equal  to the  average  closing  price of
         Purchaser common stock on the Nasdaq SmallCap Market during a period of
         thirty  (30)  trading  days prior to the  Measurement  Date,  less five
         percent (5%) (the "INITIAL VALUE").  The Closing  Consideration  Shares
         will be held in escrow for the benefit of the Seller in accordance with
         the terms and conditions of the Escrow Agreement attached as SCHEDULE 9
         (the "ESCROW AGREEMENT").

3.4      ADJUSTMENT  OF CLOSING  CONSIDERATION  SHARES.  Twelve months after the
         Closing  Date  and five  days  prior to the  expiration  of the  Escrow
         Agreement  (the  "RE-MEASUREMENT   DATE")  the  value  of  the  Closing
         Consideration  Shares will be re-measured as of the Re-measurement Date
         by reference to the average closing price of the Purchaser common stock
         on the Nasdaq  SmallCap  Market  during a period of thirty (30) trading
         days prior to the  Re-measurement  Date,  less five  percent  (5%) (the
         "FINAL VALUE"). If:

         (a)      the Final Value is 90% of the Initial  Value or greater,  then
                  there  shall  be  no  adjustment  of  the  amount  of  Closing
                  Consideration Shares;

         (b)      the  Final  Value is 80% or  greater  but less than 90% of the
                  Initial Value then the amount of Consideration Shares shall be
                  increased to the number of Consideration  Shares multiplied by
                  a fraction  consisting  of the  Initial  Value  divided by the
                  Final Value;

         (c)      the Final Value is less than 80% of the Initial Value then the
                  amount  of  Consideration  Shares  shall be  increased  to the
                  number of Closing Shares multiplied by 1.25.

         Twelve  months  after the Closing  the  Consideration  Shares  shall be
         transferred  to Seller in accordance  with the terms and  conditions of
         the Escrow Agreement, except for those Consideration Shares retained by
         the escrow agent as additional recourse for indemnity claims made under
         Article 7 below or those  Consideration  Shares  released  pursuant  to
         Article 3.7 below.

3.5      REGISTRATION  RIGHTS.  The Purchaser will use commercially best efforts
         to  register  the  Consideration   Shares  for  resale  and  have  such
         registration   declared   effective  by  the  Securities  and  Exchange
         Commission  of the United States  ("SEC")  within six (6) months of the
         Closing  Date,  in  accordance  with the  terms and  conditions  of the
         Registration  Rights  Agreement  attached as SCHEDULE 8  ("REGISTRATION
         RIGHTS AGREEMENT").

3.6      SURVIVAL  OF  ESCROW.  If the  registration  for  resale  has not  been
         declared effective by the SEC prior to the release of the Consideration
         Shares from escrow, the adjustment obligation of the Purchaser pursuant
         to Article 3.4 will survive  until the earliest  date that those shares
         can be  transferred  by Seller as a result  of valid  registration  for
         resale or qualification under other rules and regulations of the SEC.

3.7      RELEASE OF ESCROW SHARES. Six months after Closing the Seller will have
         the right to pay an amount of EUR  1,250,000  into the  escrow  account
         against release by the Purchaser of the

                                                                               4


         Consideration  Shares,  regardless of the value of those shares at that
         time and without  prejudice to the obligations of the Seller as set out
         in the Registration  Rights Agreement.  In such an event the Seller and
         the Purchaser  shall jointly issue written  instructions  to the escrow
         agent appointed under the Escrow Agreement.


                               ARTICLE 4 - CLOSING
                               -------------------

4.1      PLACE OF CLOSING AND CONDITIONS PRECEDENT.  Closing shall take place at
         the offices of Baker & McKenzie, Leidseplein 29, 1017 PS Amsterdam, The
         Netherlands  within  five  business  days  after  all of the  following
         conditions  precedent  (the  "CONDITIONS  PRECEDENT")  have been either
         fulfilled or waived by the  Purchaser,  or at such other place and time
         as shall be mutually agreed between the Parties:

         (a)      Completion   of   a   legal,   financial,    tax,   actuarial,
                  environmental and commercial  pre-acquisition  review over the
                  business  and  records of the  Company and the results of such
                  review  being  satisfactory  to the  Purchaser in its sole and
                  absolute discretion;

         (b)      The Seller  Warranties  and the Additional  Seller  Warranties
                  remaining in all material  respects  true and accurate and not
                  misleading  at Closing as if  repeated  at Closing  and Seller
                  having  complied  in all  material  respects  with  all of the
                  obligations  herein  required to be  performed  by it prior to
                  Closing and Seller having  delivered to Purchaser at Closing a
                  certificate, dated the Closing Date, to the foregoing effect;

         (c)      Receipt of audited  financial  statements in  accordance  with
                  U.S.  Generally Accepted  Accounting  Principles for the years
                  2004,  2003 and  2002 for the  Company,  the  results  of such
                  audits  to  be  consistent   with  the  financial   statements
                  previously provided to the Purchaser,  except as a result of a
                  difference in accounting principles;

         (d)      Receipt of the consent of the AOS's auditors for the Purchaser
                  to use their opinion on the audited financial statements noted
                  in 4.1(c) in any  filings to be made with the U.S.  Securities
                  and Exchange Commission;

         (e)      The delivery of un-audited balance sheet, income statement and
                  cash flow ("Interim Financial Statements") for the month ended
                  just prior to the Closing Date prepared on a basis  consistent
                  with the  audited  financial  statements  noted in 4.1(c).  If
                  closing is on January 31, 2005,  Seller will  cooperate  fully
                  with Purchaser in the  preparation  of such Interim  Financial
                  Statements  as  soon  as  practicable  following  closing  and
                  reimburse  Purchaser  promptly if the  tangible  net equity is
                  less than 85,000 Euros.

         (f)      The   execution   of  an   employment   agreement,   including
                  non-compete  provisions,  with Mr. M. Filipan,  and letters of
                  intent  confirming  the  willingness to stay employed with the
                  Company  for each of the  individuals  referred  to in Article
                  4.1.(a) and (b) below,  effective  upon the Closing Date,  for
                  the following periods:

                  a.       M.  Filipan,  P. Romein and A. Derks for a three-year
                           period, and

                  b.       H. Braams, B. Hennink,  F. Cornelis,  H. Bourguignon,
                           M. Selten and M. Langejans for a two-year period;

                                                                               5


         (g)      The Company  having  operated  its  business  in the  ordinary
                  course thereof,  consistent with past practices, from December
                  31, 2004 through the Closing Date;

         (h)      The  Purchaser  having  reviewed and accepted all  significant
                  commitments,  agreements or transactions executed prior to the
                  Closing Date,  including  material  contracts  with  suppliers
                  and/or  customers,  future  employees and contracts out of the
                  ordinary course of business;

         (i)      Approval by the board of  directors  of the  Purchaser of this
                  Agreement and all transactions contemplated hereby.

4.2      WAIVER OF CONDITIONS  AND  TERMINATION.  The Purchaser and seller shall
         each have the right  (but not the  obligation)  to waive any or more of
         the Conditions Precedent as it may deem fit. If by four weeks after the
         signing of this Agreement the Conditions Precedent have not been either
         fulfilled  or waived  then each of the Seller and the  Purchaser  shall
         have the right to terminate this Agreement forthwith, in which event no
         Party shall liable to any other Party for damages.

4.3      CONDUCT OF  BUSINESS  PRIOR TO  CLOSING.  The Seller and the  Purchaser
         shall use their  reasonable  best efforts so as to cause the Conditions
         Precedent to be fulfilled as soon as reasonably possible after the date
         of this Agreement.  Except as expressly contemplated by this Agreement,
         the Seller will  between the date hereof and the Closing Date cause the
         Company to conduct its  operations  in the ordinary and usual course of
         business and consistent with past practice,  and the Company shall, and
         the Seller shall cause the Company to use its best efforts, to preserve
         intact its business organization, to keep available the services of its
         officers and employees and to maintain satisfactory  relationships with
         persons and entities having business dealings or business relationships
         with them. Without limiting the generality of the foregoing, and except
         as otherwise  expressly  provided in or contemplated by this Agreement,
         between the date hereof and Closing Date the Company will not,  without
         the prior written consent of the Purchaser  (which consent shall not be
         unreasonably withheld):

         (j)      amend its articles of association;

         (ii)     issue,  sell,  or dispose of any  shares in its  capital,  any
                  options,  warrants or rights of any kind to acquire any shares
                  in their capital or any securities  which are convertible into
                  or exchangeable for any shares in its capital;

         (iii)    split,  combine  or  reclassify  any  shares  in its  capital,
                  declare,  set aside or pay any dividend or other  distribution
                  (whether  in  cash,  stock  or  property  or  any  combination
                  thereof) in respect of any shares in its capital, or redeem or
                  otherwise acquire any shares in its capital;

         (iv)     create,   incur,  or  guarantee  long-term   indebtedness  for
                  borrowed money or short-term  indebtedness  for borrowed money
                  which in the aggregate exceeds EUR 25,000 or issue or sell any
                  debt securities;

         (v)      adopt,  enter  into  or  amend  any  bonus,   profit  sharing,
                  compensation,  stock  option,  warrant,  pension,  retirement,
                  deferred compensation,  employment,  severance, termination or
                  other employee benefit plan,  agreement or arrangement for the
                  benefit or welfare of any  officer,  director  or  employee or
                  except as reasonably called for pursuant to formulas contained
                  in  existing   employee   benefit  plans  or  arrangements  or
                  otherwise  in the ordinary  course of business and  consistent
                  with past  practice  (none of which shall be  unreasonable  or
                  unusual), agree to any increase in the compensation

                                                                               6


                  payable  or to become  payable  to any  officer,  director  or
                  employee;

         (vi)     purchase  or  otherwise  acquire,  by  merger,  consolidation,
                  acquisition  of  securities  or assets or  otherwise,  (i) any
                  corporation,   partnership,   association  or  other  business
                  organization  or  division  thereof  or  (ii)  any  assets  or
                  properties which would be material,  in the aggregate,  to the
                  Group taken as a whole;

         (vii)    sell,  lease,  or  otherwise  dispose  of any of its assets or
                  properties  which are material to the  Company,  other than in
                  the ordinary course of business;

         (viii)   mortgage or encumber any of its assets or properties which are
                  material to the Company taken as a whole;

         (ix)     make any  capital  expenditures  or  commitments  for  capital
                  expenditures which, in the aggregate, exceed EUR 25,000;

         (x)      pay or discharge any material claim or liability other than in
                  the  ordinary  course  of  business  or  pursuant  to  binding
                  contractual obligations of the Company or set forth herein;

         (xi)     enter into any  material  contract  other than in the ordinary
                  course of business  consistent with past practice or amend any
                  Material Contract (as such term is defined in SCHEDULE 4);

         (xii)    take any action  which would cause any Warranty not to be true
                  and correct as of the Closing Date;  or (xiii) agree,  whether
                  in writing or otherwise, to do any of the foregoing.

4.4      SELLER'S CLOSING OBLIGATIONS. At Closing, the Seller shall:

         (a)      deliver or cause to be delivered to the Purchaser:

                  (i)      the original shareholders registers of the Company;

         (b)      execute:

                  (i)      the Notarial Transfer Deed;

                  (ii)     the Escrow Agreement;

                  (iii)    the Registration Rights Agreement.

         (c)      cause:

                  (i)      the Company to execute the Notarial Transfer Deed;

                  (ii)     Messrs.  M. Filipan,  P. Romein, A. Derks, H. Braams,
                           B. Hennink,  F. Cornelis,  H. Bourguignon,  M. Selten
                           and M. Langejans to execute the employment agreements
                           substantially  in  form  set  forth  as  Schedule  10
                           hereto.

         (d)      authorize the civil law notary executing the Notarial Transfer
                  Deed  to  make  the  relevant   entries  in  the  shareholders
                  registers of the Companies.

4.5      PURCHASER'S CLOSING  OBLIGATIONS.  At Closing, and upon the delivery of
         the items set out in Article 4.2 above, the Purchaser shall:

                                                                               7


         (a)      execute the Notarial Transfer Deed;

         (b)      execute the Escrow Agreement;

         (c)      execute the Registration Rights Agreement.

         (d)      instruct the civil law notary of Baker & McKenzie (who,  prior
                  to Closing,  shall have  received from the Purchaser an amount
                  equal to the Consideration Cash into its trust account) to pay
                  the  Consideration  Cash to a bank account  designated  by the
                  Seller in writing,  and Seller's  receipt  thereof shall be an
                  absolute discharge therefore;

         (e)      issue the Closing Consideration Shares to the Escrow Agent.

4.6      NON-COMPLIANCE.  If the Seller or Purchaser fails to perform any action
         required  from it under Article 4.4 or 4.5, the other Party may, at its
         option  and  without  prejudice  to any of its other  rights and claims
         (including,  also if this Agreement is terminated, any right to payment
         of damages):

         (a)      demand that the defaulting Party performs the relevant actions
                  on a day and at a time to be determined by the  non-defaulting
                  Party; or

         (b)      terminate  this  Agreement  by  written  notice  (without  any
                  liability towards the defaulting Party).


                       ARTICLE 5 - EARN OUT CONSIDERATION

5.1      EARN OUT CONSIDERATION.  The Purchaser shall pay to the Seller the Earn
         Out  Consideration as defined and calculated in more detail in SCHEDULE
         7.

5.2      SET-OFF.  The  Purchaser  shall have the right to set off any amount of
         the Earn Out Consideration against the amount of any Claim.


                   ARTICLE 6 - REPRESENTATIONS AND WARRANTIES
                   ------------------------------------------

6.1      WARRANTIES  OF  THE  SELLER.  The  Seller   represents,   warrants  and
         undertakes  ("VERKLAART,  STAAT  ER  VOOR  IN EN  GARANDEERT")  to  the
         Purchaser that each of the warranties  forth on SCHEDULE 4 (the "SELLER
         WARRANTIES")  is at the date of this  Agreement and on the Closing Date
         (if different)  true,  accurate and not misleading.  The Seller and the
         Purchaser  explicitly agree that the Seller Warranties shall constitute
         an  allocation  of risks  between the  Purchaser  and the Seller to the
         extent that  adverse  consequences  from  incorrect  and/or  incomplete
         Seller  Warranties  shall  at all  times be for the  full  account  and
         liability of the Seller (even if the Purchaser  knew or could have been
         aware of such incorrectness  and/or  incompleteness at the time of this
         Agreement or at the time of Closing).

6.2      ADDITIONAL  WARRANTIES  OF THE  SELLER,  FILIPAN  BEHEER,  FILIPAN  AND
         PIJNENBURG BEHEER NV. Each of the Seller,  Filipan Beheer,  Filipan and
         Pijnenburg Beheer NV represents,  warrants and

                                                                               8


         undertakes  ("VERKLAART,  STAAT ER VOOR IN EN  GARANDEERT") to and with
         the Purchaser  that each of the  warranties of such person as set forth
         on SCHEDULE 5 ("ADDITIONAL SELLER WARRANTIES") hereto is at the date of
         this Agreement and as of the Closing Date (if different) true, accurate
         and not misleading.  Each of the Seller, Filipan,  Pijnenburg Beheer NV
         and  the  Purchaser   explicitly  agrees  that  the  Additional  Seller
         Warranties shall constitute an allocation of risks among the Purchaser,
         Filipan,  Pijnenburg  Beheer  N.V.  and the Seller to the  extent  that
         adverse consequences from incorrect and/or incomplete Additional Seller
         Warranties  shall at all times be for the full account and liability of
         the Seller,  Filipan and  Pijnenburg  Beheer NV (even if the  Purchaser
         knew  or  could   have  been   aware  of  such   incorrectness   and/or
         incompleteness  at  the  time  of  this  Agreement  or at the  time  of
         Closing).

6.3      WARRANTIES OF THE  PURCHASER.  The Purchaser  represents,  warrants and
         undertakes ("VERKLAART,  STAAT ER VOOR IN EN GARANDEERT") to the Seller
         that each of the  warranties  set forth in  SCHEDULE 6 (the  "PURCHASER
         WARRANTIES")  is at the date of this  Agreement  and as of the  Closing
         Date (if different) true, accurate and not misleading.

6.4      DISCLOSURE   LETTER.   The  Seller  Warranties  and  Additional  Seller
         Warranties  are  given  subject  to  matters  fully  and   specifically
         disclosed in the Disclosure Letter but no other information relating to
         the  Company  of  which  the  Purchaser   has   knowledge   (actual  or
         constructive)  and no  investigation  by or on behalf of the  Purchaser
         shall  prejudice  any claim  made by the  Purchaser  under  the  Seller
         Warranties  or  Additional  Seller  Warranties or operate to reduce any
         amount  recoverable,  and  liability  in respect  thereof  shall not be
         confined to breaches discovered before Closing. No letter,  document or
         other  communication shall be deemed to constitute a disclosure for the
         purposes of this Agreement unless the same is expressly  referred to in
         the Disclosure Letter.

6.5      QUALIFICATIONS.  Where  any  statement  in  the  Seller  Warranties  or
         Additional  Seller  Warranties or any confirmation or certificate given
         by  the  Seller  hereunder  or  pursuant  hereto  is  qualified  by the
         expression  "so far as the  Seller  is  aware"  or "to the  best of the
         Seller's  knowledge  and  belief"  or  any  similar  expression,   that
         statement  shall be deemed to include an additional  statement  that it
         has been made after due and careful enquiry.


                        ARTICLE 7 - REMEDIES FOR BREACHES
                        ---------------------------------

7.1     BREACHES  AND  INFRINGEMENTS.  In the  event of a  breach  of any of the
        Seller  Warranties or Additional Seller Warranties or covenants given by
        the Seller  ("BREACH"),  the Seller shall  reimburse  and hold  harmless
        ("SCHADELOOS  STELLEN")  either the  Purchaser  or the  Company  (at the
        option of the Purchaser) for all damages,  losses,  reasonable costs and
        expenses  ("DAMAGES")  suffered  by the  Purchaser  or the  Company as a
        result of the Breach, without prejudice to other statutory rights of the
        Purchaser.  The Parties  agree that the Damages shall include the amount
        necessary to put the Purchaser - or at the option of the Purchaser,  the
        Company - in a position  similar to the  position  the  Purchaser or the
        Company would have been in without the relevant Breach.

7.2     CLAIM ON BEHALF OF THE COMPANY.  It is expressly  understood that if and
        to the  extent  an  event  gives  rise to a Claim  under  more  than one
        Warranty, the Purchaser shall be entitled to file a Claim under any such
        breached Warranty as it may deem fit, on its own behalf and/or on behalf
        of the Company as third party  beneficiary of the right to be reimbursed
        and held

                                                                               9


         harmless pursuant to this Article 7, provided,  however, that it cannot
         claim  reimbursement of the same Damages twice. Also, for the avoidance
         of doubt it is  expressly  confirmed  and  understood  that  where this
         Article 7 refers to "Damages suffered by the Purchaser or the Company",
         such damages  shall not be deemed to have been doubly  incurred by both
         the  Purchaser and the Company,  which means that any Damages  suffered
         for which the  Company is  reimbursed  cannot be  claimed  twice by the
         Purchaser, and vice versa.

7.3      ADDITIONAL  INDEMNITY.  In addition,  and without  prejudice to Article
         7.1, the Seller shall indemnify and hold the Purchaser,  its respective
         representatives,  stockholders, controlling persons and affiliates, and
         the  Company  harmless  from any and all  Damages  arising out of or in
         connection with:

         (a)      all  liability  of the Company for Taxes  attributable  to tax
                  periods ending on or before the Closing Date to the extent not
                  reserved against in the Balance Sheet;

         (b)      all liability  associated  with  predecessors  to the Company,
                  including but not limited to  liabilities  for profit  sharing
                  payments;

         it being  understood and agreed that the limitation of liability as set
         forth in Article 7.4 through 7.6 shall not apply.

7.4      SURVIVAL.  Subject to Article 7.6, all Seller Warranties and Additional
         Seller  Warranties  shall  survive the Closing  Date for the period set
         forth in Article 7.5, provided, however, that the Seller Warranties set
         forth in Schedule 4, Section 22  (Taxation)  shall  survive the Closing
         Date until the relevant  statute of limitations  with respect to Taxes,
         including the term during which  additional  assessments  can be levied
         ("NAVORDERINGSTERMIJN or NAHEFFINGSTERMIJN",  as referred to in Section
         16 and 20 of the  "Algemene wet inzake  Rijksbelastingen"),  shall have
         expired.  All such Seller  Warranties and Additional  Seller Warranties
         shall expire on such dates, except for Claims asserted by the Purchaser
         prior to such dates.

7.5      THRESHOLD AND LIMITATIONS FOR INDEMNIFICATION.

                  (i)      The   Purchaser   shall  not  be   entitled  to  seek
                           indemnification  for any Claim for Breach  unless the
                           total  amount of  Damages  arising  from such  Breach
                           exceeds EUR 5,000.  Individual  Breaches of a similar
                           nature  which are each  less than EUR 5,000  shall be
                           accumulated for purposes of determining  whether this
                           EUR 5,000 threshold is reached.

                  (ii)     Subject to Article 7.6, the  Purchaser  agrees not to
                           enforce any Claim until the  aggregate  amount of all
                           indemnifiable  Claims exceeds EUR 25,000 and then the
                           Purchaser  shall be  entitled  to recover  all Claims
                           from the first Euro.

                  (iii)    The  maximum  liability  of the  Seller  shall be EUR
                           2,500,000,  which maximum liability shall decrease to
                           zero as of 4 February 2007.

7.6      QUALIFICATIONS  TO  LIMITATIONS.  If in any case a Claim has  arisen by
         reason of:

         (i)      fraud or  willful  concealment  or  dishonesty  or  deliberate
                  non-disclosure  on the part of the Seller prior to the date of
                  this Agreement; or

         (ii)     the Seller not having  good and  unencumbered  title to any of
                  the Shares;

                                                                              10


         then in any such case none of the limitations set forth in Articles 7.4
         and 7.5 shall apply.

7.7      EVENTS AFTER CLOSING.  No Claim by Purchaser for any Breach shall arise
         to the  extent  that the Claim  arises as a result of (i) any change in
         the accounting principles applied by the Company subsequent to Closing,
         or of (ii) any changes in applicable laws or regulations  after Closing
         or of (iii) a new  interpretation  of existing laws by a court or other
         public authority in a judgment or decision published after Closing.

7.8      PAYMENTS RECEIVED. If the Seller has made a payment for Damages and the
         Purchaser  or the  Company  simultaneously  therewith  or  subsequently
         thereto receives any benefit other than from the Seller which would not
         have been received but for the circumstance giving rise to the Claim in
         respect of which the payment  for  Damages was made by the Seller,  the
         Purchaser  shall,  once it or the Company  has  received  the  benefit,
         forthwith  repay to the  Seller  an amount  equal to the  lesser of the
         amount of such benefit and the amount paid by the Seller.

7.9      CLAIM PROCEDURE.

         (a)      The  Purchaser  shall  give the  Seller  written  notice  (the
                  "INDEMNIFICATION  NOTICE") of any facts and the  circumstances
                  giving  rise to a  Claim  within  30  days of the  Purchaser's
                  becoming aware of the facts and  circumstances  giving rise to
                  such Claim.  However,  failure of the  Purchaser  to give such
                  notice  within such 30-day period shall not relieve the Seller
                  of its  liability  with  respect to such  Claim  except to the
                  extent that  Purchaser's  failure to give  notice  within such
                  period causes damages to Seller.

         (b)      If the  Claim  relates  to a claim or the  commencement  of an
                  action or  proceeding  by a Third  Party  against  the Company
                  and/or the Purchaser, then the Seller shall have, upon request
                  within  sixty (60) days after  receipt of the  Indemnification
                  Notice  (but  not  in  any  event  after  the   settlement  or
                  compromise  of such  Claim),  the right to defend,  at its own
                  expense and by its own counsel,  any such matter involving the
                  asserted  liability  of  the  Company  and/or  the  Purchaser;
                  provided,  however,  that if the Company  and/or the Purchaser
                  determines that there is a reasonable probability that a Claim
                  may  materially  and adversely  affect it, it shall at its own
                  discretion have the right to defend (with the participation of
                  the  Seller,  if the Seller so elects),  compromise  or settle
                  such  claim or suit,  provided  however  the  Seller  has been
                  timely informed of settlement  negotiations.  The Seller shall
                  make  reasonable  endeavours to strike a fair balance  between
                  the interests of the Seller in keeping the compensation as low
                  as possible and the  interests of the Purchaser and any of the
                  Company to maintain  good  business  relations  with the Third
                  Party  concerned.  If the Seller shall decide that it will not
                  defend,  at its own expense and by its own  counsel,  any such
                  matter involving the asserted  liability of the Company and/or
                  the Purchaser and the Company and/or the Purchaser shall incur
                  costs directly or indirectly  relating to this decision of the
                  Seller,  the Purchaser  shall have full  recourse  against the
                  Seller as to the costs incurred.

         (c)      If the Claim does not relate to a claim or the commencement of
                  an action or  proceeding  by a Third  Party,  the Seller shall
                  have  thirty  (30) days after  receipt of the  Indemnification
                  Notice  during  which it shall have the right to object to the
                  subject  matter  and the  amount of the Claim set forth in the
                  Indemnification Notice by

                                                                              11


                  delivering  written notice  thereof to the  Purchaser.  If the
                  Seller does not so object within such  thirty-day  period,  it
                  shall  be  conclusively  deemed  to  have  agreed  that  it is
                  obligated to indemnify  Purchaser for the matters set forth in
                  the Indemnification  Notice. If the Seller sends notice to the
                  Purchaser   objecting   to  the   matters  set  forth  in  the
                  Indemnification Notice, the Seller and the Purchaser shall use
                  their best efforts to settle the Claim.  If the Seller and the
                  Purchaser are unable to settle the Claim,  the matter shall be
                  resolved  in the  manner  set  forth in  Article  13.2 of this
                  Agreement.

7.9      NO  KNOWLEDGE.  Purchaser  is  not  currently  aware  of any  facts  or
         circumstances  that  could  give rise for a Breach or an  indemnifiable
         event as defined in Article 7.3.


                        ARTICLE 8 - RESTRICTIVE COVENANTS
                        ---------------------------------

8.1      RESTRICTIONS.  The Seller and Purchaser  recognize and acknowledge that
         the Company has unique  proprietary know how,  technology and goodwill,
         the  value  of  which   constitute   a   significant   portion  of  the
         Consideration.   Accordingly  in  order  to  preserve  this  know  how,
         technology  and  goodwill  the Seller  and  Guarantors  undertake  on a
         several  but not joint basis  ("INDIVIDUEEL  NIET  HOOFDELIJK"),  that,
         except with the prior  written  consent of the  Purchaser and except as
         provided for in this Agreement:

         (a)      for the period of three  years  after  Closing  they will not,
                  within  any  country  in which  the  Company  has  carried  on
                  business during the year preceding Closing either on their own
                  account  or in  conjunction  with or on behalf of any  person,
                  firm  or  company  carry  on  or  be  engaged,   concerned  or
                  interested,  directly or indirectly,  whether as  shareholder,
                  director,  employee,  partner, agent or otherwise carry on the
                  business  of the  Company  (other  than as  permitted  by this
                  Agreement  or as a holder  of not more  than 5 per cent of the
                  issued shares or  debentures of any company  listed on a stock
                  exchange);

         (b)      for the  period  of five  years  after  Closing  they will not
                  either  on their  own  account  or in  conjunction  with or on
                  behalf of any other person,  firm or company solicit or entice
                  away or attempt to solicit or entice away from the Company the
                  custom of any person,  firm, company or organisation who shall
                  at any time  within  the year  preceding  Closing  have been a
                  customer,  identified  prospective  customer,  representative,
                  agent  or  distributor  of  the  Company  or in the  habit  of
                  regularly dealing with the Company;

         (c)      for the  period  of five  years  after  Closing  they will not
                  either  on their  own  account  or in  conjunction  with or on
                  behalf of any other person,  firm or company employ,  solicit,
                  entice away or attempt to employ,  solicit or entice away from
                  the  Company  any person who at Closing is, or within the year
                  preceding such employment, solicitation, enticement or attempt
                  shall have been, a manager,  consultant,  agent or employee of
                  the Company  whether or not such person  would commit a breach
                  of contract by reason of leaving such employment;

         (d)      they will not at any time hereafter make use of or disclose or
                  divulge to any person (other than to employees or directors of
                  the  Company  whose  province it is to know the same) and will
                  keep  confidential  any  information  that is  confidential by
                  nature or

                                                                              12


                  expressly labeled as confidential  (other than any information
                  properly  available  to the public or  disclosed  or  divulged
                  pursuant  to an order of a court  of  competent  jurisdiction)
                  relating to the Company,  the identity of their  customers and
                  suppliers, their products, finance,  contractual arrangements,
                  business or methods of business.

8.2      CONTINUED  EFFECTIVENESS.  While the restrictions  contained in Article
         8.1  are  considered  by  the  Parties  to be  reasonable  in  all  the
         circumstances,  it is  recognized  that  restrictions  of the nature in
         question may fail for technical  reasons and  accordingly  it is hereby
         agreed and declared that if any of such restrictions  shall be adjudged
         to be void as going beyond what is reasonable in all the  circumstances
         for the  protection  of the  interests of the  Purchaser,  but would be
         valid  if part of the  wording  thereof  were  deleted  or the  periods
         thereof  reduced or the range of  activities or area dealt with thereby
         reduced  in  scope  the  said   restriction   shall   apply  with  such
         modifications as may be necessary to make it valid and effective.

8.3      CONTINUED ASSISTANCE.  The Seller and its Related Parties will continue
         to render such services to the Company as may reasonably be required by
         the Purchaser at such terms and  conditions as may further be agreed by
         the Parties.


                            ARTICLE 9 - MISCELLANEOUS
                            -------------------------

9.1      PARTIES'  COSTS.  Each Party to this Agreement  shall pay its own costs
         and  disbursements of and incidental to this Agreement and the sale and
         purchase of the Shares,  provided  that all costs  associated  with the
         Notarial  Transfer  Deed shall be borne by the  Purchaser.  The Company
         shall not pay any fees or other costs of outside advisors in connection
         with the transactions contemplated hereby.

9.2      NOTICES. Each notice, demand or other communication given or made under
         this  Agreement  shall  be in  writing  and  delivered  or  sent to the
         relevant  Party at its  address  or fax  number  set out below (or such
         other  address  or fax  number as the  addressee  has by five (5) days'
         prior written notice specified to the other Parties):

         To the Purchaser:          VASCO Data Security International, Inc.
                                    1901 South Meyers Road
                                    Oakbrook Terrace, Illinois 60181
                                    United States of America
                                    Telephone No.: +1 630 932-8844
                                    Facsimile No.: +1 630 932-8852
                                    Attention: Cliff Bown

         With a copy to:            Baker & McKenzie, Attorneys at Law
                                    Postbus 2720
                                    1000 CS Amsterdam
                                    Telephone No: +31 20 55 17 555
                                    Fascimile No: +31 20 626 79 49
                                    Attention:    Jeroen O. Hoekstra
                                                  Peter Roos

                                                                              13


         To the Seller:             AOS Holding B.V.
                                    De Tweeling 20A,
                                    5215 MC `s Hertogenbosch
                                    The Netherlands
                                    Telephone No: +31 73 691 88 88
                                    Fascimile No: +31 73 691 88 99
                                    Attention: Mr. M. Filipan

         With a copy to:            Holsteijn Timmermans Advocaten
                                    Mr J.F. Holsteijn
                                    Rapenburg 35, 2311 GG Leiden
                                    The Netherlands
                                    Telephone No. 00 31 71 5160060
                                    Fascimile No. 00 31 71 5160066

         Any notice,  demand or other communication so addressed to the relevant
         Party  shall be deemed to have been  delivered  (a) if given or made by
         letter,  when actually  delivered to the relevant  address;  and (b) if
         given or made by fax, when dispatched.

9.3      WAIVER.  No failure or delay by the Purchaser in exercising  any right,
         power or remedy under this Agreement shall operate as a waiver thereof,
         nor shall any  single or  partial  exercise  of the same  preclude  any
         further exercise  thereof or the exercise of any other right,  power or
         remedy.  Without limiting the foregoing,  no waiver by the Purchaser of
         any breach by the Seller of any provision  hereof shall be deemed to be
         a  waiver  of any  subsequent  breach  of that or any  other  provision
         hereof.

9.4      ASSIGNMENT.  This  Agreement and the rights and  obligations  hereunder
         shall be  assignable  only by the  Purchaser  without the prior written
         consent of the Seller  being  required.  None of  Seller,  Filipan  and
         Pijnenburg  shall  assign  this  Agreement  or any of their  respective
         rights or obligations  hereunder  without the prior written  consent of
         the Purchaser. Any assignments without the prior written consent of the
         Purchaser shall be null and void.

9.5      ENTIRE AGREEMENT. This Agreement (together with the Schedules, Exhibits
         and  Annexes  hereto and any  documents  referred to herein or executed
         contemporaneously  or at Closing by the Parties in connection herewith)
         constitutes the whole agreement  between the Parties and supersedes any
         previous  agreements  or  arrangements  between  them  relating  to the
         subject  matter of this  Agreement,  including  but not  limited to the
         confidentiality  agreement  dated November 22, 2004 and it is expressly
         declared that no variations of this Agreement shall be effective unless
         made in writing and executed by the Parties.

9.6      CONTINUITY OF  OBLIGATIONS.  All the provisions of this Agreement shall
         remain in full force and effect notwithstanding Closing (except insofar
         as they set out obligations that have been fully performed at Closing).

9.7      SEVERABILITY. If any provision or part of a provision of this Agreement
         shall  be,  or  be  found  by  any  authority  or  court  of  competent
         jurisdiction  to be,  invalid  or  unenforceable,  such  invalidity  or
         unenforceability shall not affect the other provisions or parts of such
         provisions of this  Agreement,  all of which shall remain in full force
         and effect.

9.8      OTHER RIGHTS AND REMEDIES.  Any right of termination conferred upon the
         Purchaser hereby shall

                                                                              14


         be in  addition  to and  without  prejudice  to all  other  rights  and
         remedies  available to it (and,  without prejudice to the generality of
         the  foregoing,  shall not extinguish any right to damages to which the
         Purchaser  may be entitled in respect of the breach of this  Agreement)
         and no  exercise  or failure to  exercise  such a right of  termination
         shall  constitute a waiver by the  Purchaser of any such other right or
         remedy.

9.9      FURTHER ACTS. Upon and after Closing the Seller and the Purchaser shall
         do and execute or cause to be done and executed all such further  acts,
         deeds,  documents  and things as may be necessary to give effect to the
         terms of this Agreement.

9.10     INTERPRETATION.  This Agreement shall constitute an allocation of risks
         between the Seller and the  Purchaser.  The Parties  deem the  security
         they may derive from the provisions of this Agreement essential.


                    ARTICLE 10 - RESTRICTION ON ANNOUNCEMENTS
                    -----------------------------------------

         Each  of the  Parties  hereto  undertake  that  prior  to  Closing  and
         thereafter it will not (save as required by law) make any  announcement
         in connection with this Agreement,  unless the other Party hereto shall
         have given its written consent to such announcement  (which consent may
         not be unreasonably  withheld and may be given either generally or in a
         specific case or cases and may be subject to  conditions).  The Parties
         acknowledge  that  the  Purchaser  will be  required  to  issue a press
         release  regarding this transaction and make  appropriate  filings with
         the SEC  regarding  this  transaction.  Seller  agrees  to use its best
         efforts  to  supply  material  required  to be  filed  with the SEC and
         finalize a press release that is mutually acceptable to both parties as
         soon as practicable following the Closing Date.


                      ARTICLE 11 - CONFIDENTIAL INFORMATION
                      -------------------------------------

11.1     NON-DISCLOSURE. The Parties undertake that they shall treat as strictly
         confidential all Confidential  Information received or obtained by them
         or their employees,  agents or advisers as a result of entering into or
         performing  this  Agreement  including   information  relating  to  the
         provisions  of this  Agreement,  the  negotiations  leading  up to this
         Agreement,  the subject  matter of this  Agreement  or the  business or
         affairs of each of the Parties or any member of their group and subject
         to the  provisions  of  Article  11.2  that  they  will not at any time
         hereafter  make use of or  disclose  or  divulge to any person any such
         Confidential Information and shall use their best endeavours to prevent
         the publication or disclosure of any such information.

11.2     EXCEPTIONS.  The restrictions contained in Article 11.1 shall not apply
         so as to prevent the Parties from making any disclosure required by law
         or  by  any  securities   exchange  or  supervisory  or  regulatory  or
         governmental  body  pursuant  to rules to which the  relevant  Party is
         subject or from making any disclosure to any  professional  adviser for
         the purposes of obtaining  advice  (provided always that the provisions
         of this Article  shall apply to and the Parties shall procure that they
         apply to, and are  observed in relation  to, the use or  disclosure  by
         such professional adviser of the information provided to him) nor shall
         the restrictions  apply in respect of any information  which comes into
         the public  domain  otherwise  than by a breach of this  Article by the
         Parties.

                                                                              15


                             ARTICLE 12 - GUARANTORS
                             -----------------------

12.1     Filipan  Beheer  and  Pijnenburg  Beheer  NV  hereby   irrevocably  and
         unconditionally  guarantee  for the  benefit of the  Purchaser  and the
         Company for to keep the Seller funded to a level sufficient for (i) the
         due performance by the Seller of its respective  obligations under, and
         compliance  by the Seller with the terms of, this  Agreement,  (ii) the
         full and prompt payment when due of all  obligations and liabilities of
         the Seller to the Purchaser under this Agreement,which  guarantee shall
         be limited  for the period and to the  amounts  set out under  (iii) in
         Art.  7.5 of this  Agreement.  In the event the Seller  turns out to be
         insufficiently funded to meet all of foregoing obligations then Filipan
         Beheer  and  Pijnenburg  Beheer  N.V.  shall each be 50% liable for the
         extent of the  obligations the Seller cannot meet. In the event Filipan
         Beheer turns out to be unable to meet all of foregoing obligations then
         Filipan  shall  personally  assume all  obligations  of Filipan  Beheer
         hereunder, as a surety ("BORG").

12.2     The Company shall have the right to set off any amount due from Filipan
         Beheer or  Filipan  under  Article  12.1 or any other  Article  of this
         Agreement,  against any amount  payable by the Company under  Filipan's
         employment agreement.


                  ARTICLE 13 - GOVERNING LAW AND JURISDICTION
                  -------------------------------------------

13.1     GOVERNING  LAW.  This  Agreement  shall be governed by and construed in
         accordance with the laws of The Netherlands.

13.2     JURISDICTION.  All disputes  arising in connection with this Agreement,
         or  further  agreements  or  contracts  resulting  thereof,   shall  be
         submitted to the  competent  court in  Amsterdam  (subject to appeal as
         provided by law).

13.3     MEDIATION.  The  parties to this  Agreement  will make a best effort to
         solve a dispute before an NMI certified mediator before bringing a case
         to  court,  without  prejudice  to  the  jurisdiction  of  the  summary
         proceedings judge ("voorlopige voorzieningen rechter").





                     [REST OF PAGE INTENTIONALLY LEFT BLANK]




                                                                              16


IN WITNESS  WHEREOF this  Agreement  has been executed on the day and year first
above written.


VASCO DATA SECURITY INTERNATIONAL, INC.



- ------------------------

By:      [ __________ ]
Title:   [ __________ ]


AOS HOLDING B.V.



- -----------------------

By:      Mr. Mladen Filipan
Title:   Director ("bestuurder")


FILIPAN BEHEER B.V.



- -----------------------

By:      Mr. Mladen Filipan
Title:   Director ("bestuurder")


MR. MLADEN FILIPAN




- ------------------------

PIJNENBURG BEHEER NV



- ------------------------
By:      MR. COR PIJNENBURG
Director: ("bestuurder")

                                                                              17


I, [name spouse Filipan], hereby acknowledge that I am aware that my husband has
assumed certain joint liabilities  under this Agreement.  With a view to Article
1:88 of the First Book of the Dutch  Civil  Code I hereby  consent to my husband
entering into such joint liability commitments.




[name spouse]








                                                                              18


                                   SCHEDULE 1
                                   ----------

                                   DEFINITIONS
                                   -----------

     "Additional Seller Warranties"     Has  the  meaning   ascribed  to  it  in
                                        Article 6.2;

     "Agreement"                        Means  this  share  sale  and   purchase
                                        agreement;

     "Balance                           Sheet" Means the balance  sheet that are
                                        part of the 2004 financial statements of
                                        the  Company,  attached as Annex 4(b) to
                                        Schedule 4;

     "Balance Sheet Date"               Has  the  meaning   ascribed  to  it  in
                                        Section 4(b) of Schedule 4;

     "Benefit Plans"                    Has  the  meaning   ascribed  to  it  in
                                        Section 21 of Schedule 4;

     "Breach"                           Has  the  meaning   ascribed  to  it  in
                                        Article 7.1;

     "Business Day"                     Means any day on which the banks are not
                                        required or  authorized to be closed for
                                        business in The  Netherlands,  excluding
                                        Saturdays and Sundays;

     "Claim"                            Means  a  claim  for a  Breach,  a Third
                                        Party claim or an Indemnification  Claim
                                        under  Article  7.3,   relating  to  the
                                        conduct of the  business  of the Company
                                        prior to the Closing Date;

     "Closing"                          Means   completion   of  the   sale  and
                                        purchase of the Shares as  specified  in
                                        Article 4;

     "Closing Consideration"            Has  the  meaning   ascribed  to  it  in
                                        Article3.1;

     "Closing Consideration Shares"     Has  the  meaning   ascribed  to  it  in
                                        Article 3.3;

     "Closing Date"                     Means  the  date on  which  the  Closing
                                        occurs;

     "Closing Documents"                Has  the  meaning   ascribed  to  it  in
                                        Section 3 of Schedule 4;

     "Closing"                          Means the  fulfillment  of the  Parties'
                                        obligations as set out in Article 4;

     "Company"                          Has the  meaning  ascribed  to it in the
                                        Recitals;

                                                                              19


     "Company Real Property"            Has  the  meaning   ascribed  to  it  in
                                        Section 8(d) of Schedule 4;

     "Conditions Precedent"             Has  the  meaning   ascribed  to  it  in
                                        Article 4.1;

     "Confidential                      Information"  Means any and all data and
                                        information   relating  to  the  Company
                                        and/or to the  business and affairs of a
                                        Party that may be provided,  orally,  in
                                        writing or digitally, to the other Party
                                        that is  marked or  expressly  stated as
                                        being "confidential";

     "Consideration"                    Has  the  meaning   ascribed  to  it  in
                                        Article 3.1;

     "Consideration Cash"               Has  the  meaning   ascribed  to  it  in
                                        Article 3.1(i);

     "Consideration Shares"             Has  the  meaning   ascribed  to  it  in
                                        Article 3.1;

     "Damages"                          Has  the  meaning   ascribed  to  it  in
                                        Article 7.1;

     "Disclosure                        Letter"  Means the  disclosure  from the
                                        Seller to the Purchaser, in the form set
                                        out in SCHEDULE 2 disclosing information
                                        constituting  exceptions  to the  Seller
                                        Warranties;

     "Earn Out Consideration"           Has  the  meaning   ascribed  to  it  in
                                        Article 3.1;

     "Encumbrance"                      Means  any   mortgage,   assignment   of
                                        receivables,  debenture,  lien,  charge,
                                        pledge,   title   retention,   right  to
                                        acquire,   security  interest,   option,
                                        right   of   first   refusal,   usufruct
                                        ("VRUCHTGEBRUIK")   or   limited   right
                                        (BEPERKT    RECHT)    and   any    other
                                        encumbrance,  attachment  ("BESLAG")  or
                                        condition whatsoever;

     "Environmental Laws"               Means all environmental, health, safety,
                                        occupational  safety and  zoning,  laws,
                                        statutes,    ordinances,    regulations,
                                        orders,   directives,    zoning   plans,
                                        decrees  and   requirements   concerning
                                        those    activities   and    properties,
                                        handling of any materials, discharges to
                                        the air, ground,  ground water,  surface
                                        water, and storage treatment or disposal
                                        of any  waste at or  connected  with any
                                        activity at such properties,  applicable
                                        to the Group and its  operations  having
                                        been  and  being in force at any time on
                                        or before the Closing Date;

     "Environmental Permits"            Means all conditions and requirements of
                                        all   permits,   licenses   or   similar
                                        approvals,   necessary   to  operate  in
                                        compliance with Environmental Laws;

     "Escrow Agent"                     Means the escrow agent  appointed in the
                                        Escrow Agreement;

     "Escrow Agreement"                 Means  the  escrow  agreement   attached
                                        hereto as Schedule 9;

                                                                              20


     "EUR" or "Euro"                    Means  Euro,  the  lawful   currency  of
                                        certain  participating States members of
                                        the European Union;

     "Filipan"                          Has the  meaning  ascribed  to it in the
                                        Recitals;

     "Filipan Beheer"                   Has the  meaning  ascribed  to it in the
                                        Recitals;

     "Final Gross Profits"              Has  the  meaning   ascribed  to  it  in
                                        Article 5.2;

     "Final Value"                      Has  the  meaning   ascribed  to  it  in
                                        Article 3.4;

     "Gross                             Profits"   Means   the   gross   profits
                                        collected by the Company on sales of POS
                                        equipment  to VISA  for the  Latin/South
                                        America  markets for a period of two (2)
                                        years after Closing;

     "Indemnification Notice"           Has  the  meaning   ascribed  to  it  in
                                        Article 7.10;

     "Initial Value"                    Has  the  meaning   ascribed  to  it  in
                                        Article 3.3;

     "Intellectual Property Rights"     Has  the  meaning   ascribed  to  it  in
                                        Section 11b of Schedule 4;

     "Material Adverse Effect"          Means  material  adverse  effect  on the
                                        condition   (financial  or   otherwise),
                                        results    of    operations,     assets,
                                        properties or prospects of the Group;

     "Material Contracts"               Has  the  meaning   ascribed  to  it  in
                                        Section 13 of SCHEDULE 4;

     "Measurement Date"                 Has  the  meaning   ascribed  to  it  in
                                        paragraph 3.3;

     "Notarial Transfer                 Means  the  notarial  deed  pursuant  to
     Deed"                              which  the  Shares  will be  transferred
                                        from  the   Seller  to  the   Purchaser,
                                        attached hereto as SCHEDULE 3;

     "Parties"                          Means the Seller, the Purchaser, Filipan
                                        Beheer, Filipan and Pijnenburg Beheer;

     "Person"                           Means any  existing or future,  legal or
                                        natural person;

     "Proposed Gross Profits"           Has  the  meaning   ascribed  to  it  in
                                        Article 5.1;

     "Purchaser"                        Has the  meaning  assigned  to it in the
                                        introduction to the Agreement;

     "Purchaser Warranties"             Has  the  meaning   ascribed  to  it  in
                                        Article 6.3;

     "Recitals"                         Means the recitals A through D;

     "Re-measurement Date"              Has  the  meaning   ascribed  to  it  in
                                        Article 3.4;

                                                                              21


     "Registration Rights               Has  the  meaning   ascribed  to  it  in
     Agreement"                         Article 3.5;

     "Seller"                           Has the  meaning  assigned  to it in the
                                        introduction to the Agreement;

     "Seller Warranties"                Has  the  meaning   ascribed  to  it  in
                                        Article 6.1;

     "Shares"                           Has the  meaning  assigned  to it in the
                                        Recitals;

     "Taxes" or "Taxation"              Means all forms of  taxation,  including
                                        all  national or local  taxation,  past,
                                        present and deferred (including, without
                                        limitation,  income tax  (including  net
                                        income  and  gross  income),  corporate,
                                        value   added,   occupation,   real  and
                                        personal   property,   social  security,
                                        gross receipts,  sales, use, ad valorem,
                                        franchise,       profits,       license,
                                        withholding,     payroll,    employment,
                                        excise, severance,  occupation,  premium
                                        or windfall  profit taxes,  estate duty,
                                        customs  and  other   import  or  export
                                        duties,   or   charges   of   any   kind
                                        whatsoever,  estimated  and other taxes,
                                        together  with any  interest  and levies
                                        and all  penalties,  charges,  costs and
                                        additions to tax, payable by or due from
                                        the  Group,  or any  additional  amounts
                                        imposed     by     any      Governmental
                                        Instrumentality     or    any    revenue
                                        authority, upon the Group;

     "Tax Return"                       means  any   report,   return  or  other
                                        information required to be supplied to a
                                        governmental   authority  in  connection
                                        with any Taxes;

     "The Netherlands"                  Means that portion of the kingdom of The
                                        Netherlands in Europe;

     "Third Party"                      Any person which is not a Party;

     "Seller Warranties"                Means  the  representations,  warranties
                                        and  undertakings  of the Seller set out
                                        in  Article  6 and in  SCHEDULE  4,  and
                                        "Seller   Warranty"  means  any  of  the
                                        Seller Warranties.

                                                                              22


                                   SCHEDULE 2
                                   ----------

                                DISCLOSURE LETTER
                                -----------------



                                                                              23


                                   SCHEDULE 3
                                   ----------

                             NOTARIAL TRANSFER DEED
                             ----------------------


                               [separate document]



                                                                              24


                                   SCHEDULE 4
                                   ----------

                                SELLER WARRANTIES
                                -----------------




                                                                              25


                                   SCHEDULE 5
                                   ----------

                          ADDITIONAL SELLER WARRANTIES
                          ----------------------------



                                                                              26


                                   SCHEDULE 6
                                   ----------

                              PURCHASER WARRANTIES
                              --------------------



                                                                              27


                                   SCHEDULE 7
                                   ----------

                             EARN-OUT CONSIDERATION
                             ----------------------



                                                                              28


                                   SCHEDULE 8
                                   ----------

                          REGISTRATION RIGHTS AGREEMENT
                          -----------------------------



                                                                              29


                                   SCHEDULE 9
                                   ----------

                                ESCROW AGREEMENT
                                ----------------



                                                                              30


                                   SCHEDULE 10
                                   -----------

                              EMPLOYMENT AGREEMENTS
                              ---------------------

                           [intentionally left blank]



                                                                              31