Diversinet’s Advanced Security Now Available on Symbian OS Mobile Phones

Toronto, CANADA- October 30, 2002 – Diversinet Corp. (NASDAQ SmallCap: DVNT), a leading provider of mobile commerce (m-commerce) security infrastructure solutions, announced its Passport Certificate Server now supports Symbian mobile phones.

Diversinet continues to add to its widest device coverage in the market for its Passport Certificate Server end-to-end wireless security by expanding its current offerings to include the Symbian operating system (OS) to address current customer needs.

The Symbian OS is an advanced, open operating system licensed by the world’s leading mobile phone manufacturers (Ericsson, Fujitsu, Matsushita, Motorola, Nokia, Psion, Samsung, Sanyo, Siemens and Sony Ericsson). Symbian OS is designed for the specific requirements of advanced 2G, 2.5G and 3G mobile phones and combines the power of an integrated application environment with mobile telephony, bringing advanced data services to the mass market.

Diversinet’s Symbian OS security client enables application developers to permit end-to-end application-level security on Symbian OS devices, providing end-users with a means for secure data transmission. Diversinet’s security facilitates the strong user and server authentication, privacy, and non-repudiation in wireless transmissions and transactions.

“Now that the majority of the world’s handset manufacturers are Symbian OS licensees, Symbian OS devices are set to become mainstream for providing advanced 2.5G data services,” said Craig Heath, Strategic Product Manager, Security, Symbian. “The availability of Diversinet’s certificate client for Symbian OS is a significant addition to the security toolbox available to Symbian OS developers.”

“There has been a tremendous amount of interest from our customers for Symbian OS device security solutions as they recognize the future potential of Symbian OS. Symbian 2.5G devices are quickly reaching mass market with Symbian OS licensees representing over 70% of mobile phone shipments globally,” said Hussam Mahgoub, Vice President of Products, Diversinet Corp. “We are proud to offer a security solution for Symbian, as Diversinet has always been committed to staying on top of current market trends.”

About Symbian
Symbian is a software licensing company, owned by wireless industry leaders, that is the trusted supplier of the advanced, open, standard operating system for data-enabled mobile phones. Symbian’s mission is to create a mass-market for Symbian OS mobile phones by enabling our licensees to build winning products. Open Symbian OS phones announced by licensees include the Nokia 9200 Communicator series, the Nokia 7650 and 3650 imaging phones and the Sony Ericsson P800 smartphone. Symbian’s website can be found at www.symbian.com.

About Diversinet Corp.
Diversinet is a leading software developer of advanced security infrastructure solutions for both wired and wireless terminals such as personal computers, mobile phones, PDAs and smartcards. Diversinet’s client/server security software facilitates digital signatures, authentication and encryption with products specifically designed to perform optimally in wireless environments and resource-constrained devices. In October of 2001, Diversinet enabled the launch of the first public Certification Authority in the world to offer mobile individual and business digital certificates for consumer use. For more information visit www.diversinet.com.

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The Private Securities Litigation Reform Act of 1995 provides a “safe harbor” for forward-looking statements. Certain information included in this press release (as well as information included in oral statements or other written statements made or to be made by the company) contains statements that are forward-looking, such as statements relating to anticipated future revenues of the company and success of current product offerings. Such forward-looking information involves important risks and uncertainties that could significantly affect anticipated results in the future and, accordingly, such results may differ materially from those expressed in any forward-looking statements made by or on behalf of the company. For a description of additional risks and uncertainties, please refer to the company’s filings with the Securities and Exchange Commission.




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