CYLINK CORPORATION

                                  CERTIFICATION

In connection with the periodic report of Cylink  Corporation (the "Company") on
Form 10-Q/A for the period ended September 29, 2002 as filed with the Securities
and Exchange  Commission  (the "Report"),  I, William P. Crowell,  President and
Chief  Executive  Officer of the Company,  hereby certify as of the date hereof,
solely for purposes of Title 18,  Chapter 63,  Section 1350 of the United States
Code, that to the best of my knowledge:

              (1) the Report fully  complies  with the  requirements  of Section
              13(a) or 15(d), as applicable,  of the Securities  Exchange Act of
              1934, and

              (2) the information  contained in the Report fairly  presents,  in
              all material  respects,  the  financial  condition  and results of
              operations  of the  Company  at the  dates  and  for  the  periods
              indicated.

Date: November 26, 2002                          By:     /s/ William P. Crowell
                                                         ----------------------
                                                         William P. Crowell
                                                         Chief Executive Officer
                                                         Cylink Corporation