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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

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

                                    FORM 8-K

                                 CURRENT REPORT

                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934


       Date of report (Date of earliest event reported): September 7, 1997


                               Cylink Corporation
             (Exact name of Registrant as Specified in its Charter)




                                                   
         California                    0-27742                      95-3891600
(State or Other Jurisdiction    (Commission File No.)    (IRS Employer Identification No.)
      of Incorporation)




   910 Hermosa Court, Sunnyvale, California                        94086
   (Address of Principal Executive Offices)                     (Zip Code)


                                  (408)735-5800
              (Registrant's Telephone Number, Including Area Code)








                                Page 1 of 4 Pages
                         Exhibit Index Located on Page 4

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                      INFORMATION TO BE INCLUDED IN REPORT


Item 2.  Acquisition or Disposition of Assets.

                  On  September  8,  1997,   Registrant   acquired  all  of  the
outstanding  shares of Algorithmic  Research,  Ltd., a limited liability company
organized  under the laws of the State of Israel  ("ALR")  and  Algart  Holdings
Ltd.,  a  limited  liability  company  organized  under the laws of the State of
Israel  ("Holdings")  pursuant to that certain Stock Purchase  Agreement,  dated
September 7, 1997 (the "Purchase Agreement") among Registrant, ALR and A.R. Data
Security Ltd., a limited liability company organized under the laws of the State
of Israel  ("Parent").  Parent owned all of the outstanding  shares of Holdings,
which had no material assets other than certain shares of ALR, and Holdings,  in
combination  with  Parent,  owned  all of the  outstanding  shares  of ALR.  The
consideration  for this stock  purchase was  $40,686,972  in cash and  2,593,169
shares of Registrant's  capital stock. As additional  consideration,  holders of
options to purchase  shares of Parent  received  $2,500,226  in cash and 409,641
options  to  purchase  shares  of  Registrant's   capital  stock.  In  addition,
Registrant agreed to pay up to $1,901,230 in investment  banking fees, legal and
other  professional  advisory fees incurred by Parent and ALR in connection with
the  transaction.  The amount and type of  consideration  was  determined on the
basis of  negotiations  between  Registrant and Parent and their  management and
professional  advisors. The source of the funds used for the cash portion of the
purchase price was Registrant's cash reserves.

                  As part  of the  stock  purchase,  Registrant  entered  into a
Seller's  Agreement,  dated  September 8, 1997 (the "Seller's  Agreement")  with
Parent and the  shareholders of Parent ("Parent  Shareholders"),  which provides
for certain  restrictions on the sale of Registrant's Common Stock by Parent and
Parent  Shareholders,  which in part were imposed in order to effect  compliance
with  Regulation S of the Commission  with respect to the shares of Registrant's
Common Stock issued in this stock purchase, and certain conditional registration
rights in favor of Parent and the Parent Stockholders. Registrant and the Parent
Shareholders  further  entered into that certain Parent  Shareholders  Indemnity
Agreement,  dated  as of  September  8,  1997,  pursuant  to  which  the  Parent
Shareholders agreed to indemnify  Registrant as to certain matters pertaining to
ALR.


Item 7.  Financial Statements, Pro Forma Financial Information and Exhibits.


                  (a) Financial Statements of Businesses  Acquired.  The audited
financial  statements  of ALR and Holdings are not yet  completed.  The required
audited  financial  statements  will be filed with the  Securities  and Exchange
Commission within 60 days after the filing of this report on Form 8-K.

                  (b) Pro Forma Financial  Information.  The unaudited pro forma
financial  information  of Cylink  Corporation  and ALR and Holdings are not yet
completed.  The required  unaudited pro forma information will be filed with the
Securities  and  Exchange  Commission  within 60 days  after the  filing of this
report on Form 8-K.

                  (c) Exhibits.  The Exhibit Index appearing on page 5 hereof is
hereby incorporated herein by reference.

Item 9.  Sales of Equity Securities Pursuant to Regulation S.

                  The 2,593,169  shares of Registrant's  Common Stock issued and
sold in connection with the transaction described in Item 2 above were issued in
a  nonunderwritten  sale  pursuant to Regulation S under the  Securities  Act of
1933, as amended.  With respect to the information required pursuant to Item 701
of Regulation  S-K, the description of the transaction set forth in Item 2 above
is hereby incorporated herein by reference.

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                                   SIGNATURES


         Pursuant to the  requirements  of the Securities  Exchange Act of 1934,
the  Registrant  has duly  caused  this report to be signed on its behalf by the
undersigned hereunto duly authorized.


                               CYLINK CORPORATION




                                 By  /s/ John H. Daws
                                     -------------------------------------
                                     John H. Daws
                                     Vice President and Chief Financial Officer


Date:  September 17, 1997





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                                                       EXHIBIT INDEX





                                                                                                        Sequentially
      Exhibit                                         Description                                       Numbered Page
====================        =================================================================        ====================
                                                                                                        
        2.2                 Stock Purchase Agreement, dated as of September 7, 1997,                          5
                            between Registrant, A.R. Data Security Ltd. and Algorithmic
                            Research Ltd.

        2.3                 Seller's Agreement, dated as of September 8, 1997, among
                            Registrant, A.R. Data Security Ltd., Algorithmic Research Ltd.,
                            Amos Fiat, Yossi Cohen, Yossi Tulpan, Koor Capital Markets and
                            Telrad Holdings Ltd.

        2.4                 Parent Shareholders Indemnity Agreement, dated as of
                            September 8, 1997 among Registrant, A.R. Data Security Ltd.,
                            Amos Fiat, Yossi Cohen, Yossi Tulpan, Koor Capital Markets and
                            Telrad Holdings Ltd.


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