CERTICOM FILES SUIT AGAINST SONY FOR PATENT INFRINGEMENT

Certicom Corp. will host a conference call and live webcast at 2 p.m. (ET) on Wednesday, May 30, 2007. For conference call access details, please refer to the information at the end of this release.

Toronto, Ontario – May 30, 2007 -- Certicom Corp. (TSX: CIC) today announced it has initiated litigation in the Eastern District of Texas, Marshall Division, against Sony Corporation, and related Sony companies, for patent infringement.

In its filing, Certicom alleged infringement concerning two United States patents used in the content protection technologies found in Sony products.

The patents-in-suit are two of Certicom's fundamental patents used in consumer electronics, in particular its world-leading version of Elliptic Curve Cryptography (ECC). In its complaint, Certicom alleges Sony has, and continues to, infringe, contribute to and induce the infringement of Certicom's patents by making, using, importing, offering for sale and selling their products in the U.S. without being licensed by Certicom to do so. These patents are related to content protection technologies, including Advanced Access Control System (AACS) used in Blu-ray and Digital Transmission Content Protection (DTCP) used in wired and wireless distribution of compression audio and video. Products affected include Playstation 3, DVD players, VAIO personal computers and certain high definition TV models and audio equipment.

“We have invested heavily in ECC research and development over many years and feel strongly that our shareholders deserve fair value from companies using our patented technology,” said Bernard Crotty, President and Chief Executive Officer. “We prefer to resolve these issues through commercial discussions and without litigation. However, at this point we are left with no alternative but to file suit.”

Certicom is represented by the Fish & Neave Intellectual Property Group of U.S.-based law firm Ropes & Gray.

Certicom management will host a conference call and live audio webcast at 2 p.m. (ET) on Wednesday, May 30, 2007. Participants can access the call by dialing 416-644-3415 or 1-800-733-7560 or by visiting www.certicom.com. A question and answer session for analysts and institutional investors will follow the call. The call will be archived until 12 a.m. on June 6, 2007 and can be accessed by dialing 416-640-1917 or 1-877-289-8525 and entering passcode 21234316#. The archived audio webcast can be accessed by visiting www.certicom.com.

About Certicom
Certicom protects the value of your content, applications and devices with government-approved security. Adopted by the National Security Agency (NSA) for classified and sensitive but unclassified government communications, Elliptic Curve Cryptography (ECC) provides the most security per bit of any known public-key scheme. As the undisputed leader in ECC, Certicom security offerings are currently licensed to more than 300 customers including General Dynamics, Motorola, Oracle, Research In Motion and Unisys. Founded in 1985, Certicom’s corporate offices are in Mississauga, ON, Canada with worldwide sales and marketing headquarters in Reston, VA and offices in the US, Canada and Europe. Visit www.certicom.com.

Certicom, Certicom ECC Core, Certicom Security Architecture, Certicom Trust Infrastructure, Certicom CodeSign, Certicom KeyInject, Security Builder, Security Builder API, Security Builder BSP, Security Builder Crypto, Security Builder ETS, Security Builder GSE, Security Builder IPSec, Security Builder MCE, Security Builder NSE, Security Builder PKI and Security Builder SSL are trademarks or registered trademarks of Certicom Corp. All other companies and products listed herein are trademarks or registered trademarks of their respective holders. Information subject to change.