EXHIBIT 23.1 INDEPENDENT AUDITORS' CONSENT We consent to the incorporation by reference in Registration Statements Nos. 333-09797 and 333-36845 of Cylink Corporation, on Form S-8 of our report dated February 10, 2000 appearing in this Annual Report on Form 10-K of Cylink Corporation for the year ended December 31, 1999. /s/ DELOITTE & TOUCHE LLP Deloitte & Touche LLP San Jose, California March 27, 2000 45