TMWD Tumbleweed Communications Corp (MM)

Entrust and Tumbleweed Expand Secure Messaging Initiatives Patent Cross-Licensing Agreement Reaffirms Companies' Commitment to Grow Secure Internet Communications DALLAS and REDWOOD CITY, Calif., Feb. 25 /PRNewswire-FirstCall/ -- Entrust, Inc. , a world leader in securing digital identities and information, and Tumbleweed Communications Corp. , a leading provider of secure Internet messaging software for enterprises, financial services organizations and government, today announced a patent cross- licensing agreement intended to expand the companies' secure messaging initiatives. Under the terms of the agreement, Entrust and Tumbleweed have entered into a broad cross license covering their respective patent portfolios. The agreement covers selected patents and patents issuing from patent applications that have been filed or that may be filed by either company over the next three years. The cross license agreement builds on the two companies' commitment to further the growth of secure Internet communications. This intellectual property exchange will allow each company to continue to innovate and broaden its range of commercial products and services. As part of the agreement, the companies have cost-effectively resolved a patent interference proceeding before the US Patent and Trademark Office involving U.S. patents 6,393,568 "Encryption and decryption system and method with content analysis provisioning" and 6,609,196 "Email firewall with stored key encryption/decryption", which cover technologies for messaging content analysis. The agreement allows each company to use the technologies covered by both patents, and Entrust has assigned to Tumbleweed the '568 patent in return for a financial consideration. "Both Entrust and Tumbleweedare recognized as pioneers in our respective industries," said Al Delorenzi, vice-president, Corporate and Business Development, Entrust, Inc. "The aim of this agreement is to create an environment at Entrust and Tumbleweed that fosters creativity andinnovation as we continue to expand our respective product lines." "Our two companies are doing great work in different aspects of secure messaging," said Bill Bradford, vice president of Corporate Development of Tumbleweed. "We are excited about this business relationship that we have formed with Entrust through the cross-licensing of intellectual property." About Tumbleweed Communications Corp. Tumbleweed is a leading provider of secure Internet messaging software products for enterprises, financial services organizations and government. By making Internet communications secure, reliable and automated, Tumbleweed's email firewall, secure file transfer, secure email, and identity validation solutions help customers significantly reduce the cost of doing business. Tumbleweed products are used by millions of end-users and tens of thousands of corporations. Tumbleweed customers include ABN Amro, Bank of America Securities, Catholic Healthcare West, JP Morgan Chase & Co., The Regence Group (Blue Cross/Blue Shield), Society for Worldwide Interbank Financial Telecommunication (SWIFT), St. Luke's Episcopal Healthcare System, the US Food and Drug Administration, and the US Navy and Marine Corps. Tumbleweed Communications was founded in 1993 andis headquartered in Redwood City, Calif. For additional information about Tumbleweed go to http://www.tumbleweed.com/ or call 650-216-2000. About Entrust Entrust, Inc. is a world leader in securing digital identities and information, enabling businesses and governments to transform the way they conduct online transactions and manage relationships with customers, partners and employees. Entrust's solutions promote a proactive approach to security that provides accountability and privacy for onlinetransactions and information. Over 1,200 enterprises and government agencies in more than 50 countries use Entrust's portfolio of security software solutions that integrate into the broad range of applications organizations use today to leverage the Internet and enterprise networks. For more information, please visit http://www.entrust.com/ . Entrust is a registered trademark of Entrust, Inc. in the United States and certain other countries. In Canada, Entrust is a registered trademark of EntrustLimited. All Entrust product names are trademarks or registered trademarks of Entrust, Inc. or Entrust Limited. All other company and product names are trademarks or registered trademarks of their respective owners TUMBLEWEED SAFE HARBOR STATEMENT Tumbleweed cautions that forward-looking statements contained in this press release are based on current plans and expectations, and that a number of factors could cause the actual results to differ materially from the guidance given at this time. These factors are described in the Safe Harbor statement below. Except for the historical information contained herein, the matters discussed in this press release may constitute forward-looking statements that involve risks and uncertainties that could cause actual results to differ materially from those projected, particularly with respect to the expansion of each company's secure messaging initiatives, the growth of secure Internet communications, and the expansion of each company's product lines. Insome cases, forward-looking statements can be identified by terminology such as "may," "will," "should," "potential," "continue," "expects," "anticipates," "intends," "plans," "believes," "estimates," and similar expressions. For further cautions about the risks of investing in Tumbleweed, we refer you to the documents Tumbleweed files from time to time with the Securities and Exchange Commission, particularly Tumbleweed's Form 10-K filed June 4, 2003, Form 10-Q filed November 14, 2003, and Form S-3/A filed December 19, 2003. Tumbleweed assumes no obligation to update information contained in this press release, including for example its guidance regarding its future performance, which represents the Company's expectations only as of the date of this release and should not be viewed as a statement about the Company's expectations after such date. Although this release may remain available on the Company's website or elsewhere, its continued availability does not indicate that the Company is reaffirming or confirming any of the information contained herein. DATASOURCE: Entrust, Inc.; Tumbleweed Communications Corp. CONTACT: Carrie Bendzsa of Entrust, Inc., +1-613-270-3455, or ; or Stephanie Coggin of Weber Shandwick, +1-972-830-2857,or , for Entrust, Inc.; or James Hannon of Atomic PR, +1-415-703-9454, or , for Tumbleweed Communications Corp. Web site: http://www.entrust.com/ http://www.tumbleweed.com/

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