Entrust Technologies and Worldtalk Corporation Announce Strategic Alliance.

OTTAWA--(BUSINESS WIRE)--June 30, 1997--

Both Companies to Offer Interoperable Enterprise-level E-mail

Security Solutions

Entrust Technologies, the leading provider of Certification Authority and public-key management products, today announced an alliance with Worldtalk (R) Corporation (NASDAQ:WTLK). Through the alliance, Worldtalk's WorldSecure Client(TM) will become Entrust-Ready(TM), supporting the industry's leading Entrust(R) public-key infrastructure. This will provide enterprises with a complete solution for securing deployed e-mail systems. Entrust will resell the final Entrust-Ready WorldSecure Client through its direct and indirect distribution channels.

WorldSecure Client is a robust, easy-to-use desktop e-mail security application that leverages the Secure MIME (S/MIME) standard to secure e-mail, attachments and files. The Entrust-Ready version of the WorldSecure Client will be added to the Entrust/Express(TM) family of products, providing organizations with a complete, cross-platform solution to secure e- mail. It will provide an additional layer of security for a range of e-mail applications that represent the majority of e-mail products in use in enterprises today, including Microsoft Exchange, Lotus Notes, Microsoft Outlook, GroupWise, cc:Mail and Eudora Pro.

"A secure e-mail environment requires an easy-to-use, easy-to- administer system that calls for minimal training for its users," said John Ryan, Entrust Technologies' president and CEO. "Entrust Technologies has always focused on making security features transparent for users. We have formed this alliance with Worldtalk to deliver a transparent, fully integrated e-mail solution to our customers for both Internet and internal e-mail."

Leveraging S/MIME , a key benefit of Entrust-Ready WorldSecure Clients is complete interoperability with numerous e-mail packages, regardless of the platform. Other advantages include scaleable key management, access to the Entrust FIPS 140-1 validated security kernel, and the ability to utilize one security infrastructure for e-mail and for all other commercial and custom applications. This alliance highlights Entrust's commitment to providing complete, easy-to-administer and cost-effective security solutions for enterprises.

Secure E-Mail for the Enterprise

More businesses are leveraging e-mail as a substantial component of how they do business, both within and outside organizations. E-mail currently accounts for more than 70 percent of all network traffic, including intranets and the Internet, prompting organizations to deliver secure e-mail to their users. Entrust and Worldtalk are marrying public-key infrastructure and e-mail security technology to meet organizations' need for privacy, authenticity and integrity of their e-mail systems.

"Through the alliance with Entrust, Worldtalk has added support for one of the leading enterprise public-key infrastructures which is a necessary component to any desktop e-mail security solution," said Mark Jung, chairman and CEO of Worldtalk. "The Entrust-Ready version of WorldSecure Client will overlay the majority of today's popular e-mail applications. This supports our corporate strategy of delivering solutions that allow customers to leverage existing investments in their e-mail, directory and security infrastructure."

WorldSecure Client is part of the recently announced WorldSecure(TM) product family, applications to secure e-mail communications internally and over private and public networks, including the Internet. WorldSecure delivers comprehensive e-mail security solutions aimed at elevating e-mail to business-grade to enable organizations to conduct business safely with customers, trading partners and remote offices.

Availability

The Entrust-Ready WorldSecure Client is scheduled to be available from Entrust, Entrust channel partners and Worldtalk in the third quarter of 1997.

Worldtalk Corporation

Worldtalk Corporation is a leading provider of directory-based messaging and security software solutions that support organizations in transforming intranets into secure, robust, and cost-effective platforms for business-critical applications and electronic commerce. Worldtalk's solutions are designed to enable these organizations to build, expand, and secure full service intranets, while leveraging their existing infrastructure. Worldtalk is headquartered at 5155 Old Ironsides Drive, Santa Clara, CA and can be reached at [phone]. Additional product and company information can be obtained at http://www.Worldtalk.com.

Entrust Technologies

Entrust Technologies is dedicated to ensuring the privacy and authenticity of data communications enterprisewide. Its award-winning public-key infrastructure technology combines encryption and digital signature capabilities with fully automated key management. Widely used by financial institutions, government agencies and high- tech corporations, the Entrust software family provides a complete security solution across multiple platforms for desktops, corporate networks, intranets and the Internet. Entrust Technologies is a majority owned subsidiary of Nortel (Northern Telecom) and has offices in New York, California, North Carolina, Ottawa, Virginia and London, U.K.

Visit Entrust Technologies' Web site at http://www.entrust.com

Entrust is a registered trademark of Entrust Technologies Limited. All Entrust product names are trademarks of Entrust Technologies Limited. Worldtalk is a registered trademark and WorldSecure and WorldSecure Client are trademarks of Worldtalk Corporation. All other product and company names are trademarks of their respective owners.

CONTACT: Shauna White Mike Valentino

Entrust Technologies Thomas Associates, Inc.

613-247-3418 212-332-7804

[e-mail] [e-mail]

or

Dawn Harris

Worldtalk Corporation

408-567-5033

[e-mail]