Top Law Firms Turn To Tumbleweed for Safe e-Business Communications

Nation's Leading Law Firms Using Tumbleweed to Protect Business-Critical Content Exchanged with Customers and Partners Over Email

REDWOOD CITY, CA - June 18, 2002 - Tumbleweed® Communications Corp. (Nasdaq:TMWD - News), a leading provider of secure content management solutions for enabling the business Internet, announced today that 68 of the 250 largest law firms in North America, including: Brobeck, Phleger & Harrison, LLP; Drinker Biddle & Reath, LLP; Fulbright & Jaworski LLP; and Gardere Wynne Sewell LLP; have deployed solutions from Tumbleweed to secure online correspondence with clients, legal peers and other judiciary parties.

"While the ease of use, ubiquity and expediency of email make it an attractive communication medium for legal practitioners, the liability associated with sending confidential information is staggering," said Gerard Haubrich, chief information officer at Drinker Biddle and Reath LLP. "To address this challenge and ensure the security of our online communications, we turned to Tumbleweed's industry-leading Secure Guardian platform." Haubrich added, "The solution enables us to easily develop and enforce an enterprise-wide email security policy, covering encryption, access control, first level virus scanning and auto-archiving -- all from one centralized console at the electronic frontier of the firm."

"Secure messaging and content management are fast becoming critical issues for all enterprise organizations, but the need in the legal industry is among the most pressing," said Geoff Galat, vice president, Marketing & Product Management at Tumbleweed Communications. "The widespread adoption of Secure Guardian by top law firms across the country is testament to the product's ease of use and administration, comprehensiveness and ultimate ROI."

About Tumbleweed
Tumbleweed is a leading provider of solutions for managing secure communication and collaboration to enable the business Internet. Tumbleweed's robust policy-based framework empowers organizations to safely share and protect critical information, increase customer loyalty and privacy and dramatically reduce costs. Tumbleweed is trusted by 1,000 blue-chip customers including American Express, Chevron, Datek Online, the European Union's Joint Research Council, First Union Wachovia, John Deere, Merrill Lynch, Nike, Northern Trust, NTT, Salomon Smith Barney, Travelers and the U.S. Food and Drug Administration. One hundred of the Fortune 500 are Tumbleweed customers. Tumbleweed Communications was founded in 1993 and is headquartered in Redwood City, Calif., with offices around the world.

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 Tumbleweed's customer base. In some 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 March 30, 2002. Tumbleweed assumes no obligation to update information contained in this press release.