Cylink Announces First Product Using CEPA; Cylink SecureAccess Can Switch From DES to CEPA; Users Can Choose.

SUNNYVALE, Calif.--(BUSINESS WIRE)--Sept. 4, 1996--Cylink Corp. (NASDAQ:CYLK), the leading provider of network security and management systems since 1984, today announced that the SecureAccess(TM) product family now incorporates CEPA(TM), a powerful 128-bit key, data encryption method exclusive to Cylink.

It is also the first remote access security system to incorporate both the data encryption standard (DES) and a significantly stronger algorithm (in this case, CEPA) into one product.

CEPA provides strong encryption to domestic and international corporations that wish to protect their valuable assets. The algorithm is immune to key exhaustion and sophisticated cryptoanalytic attacks. The commercial availability of CEPA increases the global market potential for Cylink products.

"As a leader in encryption technology and network security, Cylink has focused on providing the highest possible level of encryption in its products," said Dr. Jim Omura, acting chief executive officer, Cylink Corp.

"Companies require stronger algorithms to do business abroad or maintain overseas suppliers and manufacturers, and CEPA addresses this problem. With CEPA they can communicate securely, exchange delivery schedules, purchasing agreements, legal briefs, design specifications, bids, contracts, pricing information and so forth."

Omura also noted that SecureAccess with CEPA addresses the needs of the growing numbers of users with mobile offices that require them to conduct business from anyplace in the world.

Using SecureAccess, a U.S. corporation can use DES or CEPA internally and provide the DES or CEPA product to their foreign subsidiaries, suppliers, manufacturers and contractors. When e-mail messages or sensitive documents are transferred, the system can automatically switch from one to the other.

"Many of our customers have expressed their enthusiasm about the system's being able to switch from CEPA to DES because it allows them to deploy security worldwide," said Cliff Reeser, product marketing manager for Cylink's SecureAccess system. "We will be shipping the first SecureAccess system with CEPA this week."

The SecureAccess system consists of a SecureGate(TM) server located at a network access site and a choice of client security products for remote computers: SecureTraveler(TM) software for remote users, and SecurePocket(TM) Traveler hardware encryptors for use with any modem or RS232 communications.

SecureAccess uses X.509 digital certificates and Diffie-Hellman public key cryptography techniques for positive identification and encryption of communications between parties. The system capacity is scaleable to manage up to 896 dial-in lines and an unlimited number of clients. It is transparent to the user and easy to set up and administer.

Cylink holds exclusive rights to the fundamental public key cryptography patents owned by the Leland Stanford Junior University, Cryptographic Apparatus and Method (Hellman-Diffie) No. 4,200,770, and Public Key Cryptography Apparatus and Method (Hellman-Merkle) No. 4,218,582. These patents cover all implementations of public key cryptography, including Diffie-Hellman key exchange and the digital signature standard (DSS).

The networking industry has adopted Cylink's Diffie-Hellman automated key management technique as the de-facto standard. Diffie-Hellman is part of the existing and proposed business and financial security standards of ANSI, IEEE, ITU-T, ISO, IETF (including Cisco's ISAKMP and Sun's SKIP reference implementations for the IETF), as well as applications for the World Wide Web and electronic commerce.

Cylink Corp. is the recognized world leader in information security solutions, providing the most comprehensive portfolio of public-key cryptographic hardware and software products. Cylink's products enable secure data transmissions over local area networks (LANs), wide area networks (WANs), public packet switched networks such as the Internet, asynchronous transfer mode (ATM) and frame relay networks.

Cylink, headquartered in Sunnyvale, is also the leader in outdoor spread spectrum microwave radio communications. Cylink's customers include national and multinational corporations, financial institutions and government organizations.

For more information about Cylink and its products, call the fax-on-demand number 800/735-6614, or visit the company's Web site at http://www.cylink.com. -0-

Note to Editors: SecureAccess(TM), SecureGate(TM), SecureTraveler(TM), SecurePocket(TM) Traveler and CEPA(TM) are trademarks of Cylink.

Cylink(R) is a registered trademark of Cylink Corp.

CONTACT: Cylink Corp., Sunnyvale

Paula Contos Dunne, 408/523-5993

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or

Pondel Parsons & Wilkinson (investor relations)

Cecilia Wilkinson/Craig Parsons, 310/207-9300

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