Redwood City, CA – January 14, 2004 – Tumbleweed® Communications Corp. (Nasdaq:TMWD - News), a leading provider of mission-critical Internet communications software for enterprises, financial services organizations and government, and Secure Data in Motion™, dba Sigaba®, the leader in securing all data in motion, today announced that Sigaba has licensed Tumbleweed U.S. Patent No. 6,385,655 titled “Method and apparatus for delivering documents over an electronic network” and U.S. Patent No. 6,502,191 titled “Method and system for binary data firewall delivery.” The agreement also provides Sigaba with the option to license three additional Tumbleweed patents in the future. Terms of the agreement were not disclosed.

“We are pleased to work with Sigaba to enable them to bring a wider choice of technology features to their customers through our licensed technology,” said Jeffrey C. Smith, Tumbleweed’s CEO and chairman. “We will continue to further develop and enforce our patent portfolio as our research and development team continues to introduce innovative technology solutions."

Robert Cook, chief executive officer and chairman of Sigaba said, ” Sigaba has taken this step to ensure that it is in a position to offer every technological option available. This is one reason that customers value Sigaba as both a vendor and long-term partner, and it’s why the company continues to deliver comprehensive market solutions.“

About Tumbleweed Communications Corp.
Tumbleweed is a leading provider of mission-critical Internet communications 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 and is headquartered in Redwood City, Calif. For additional information about Tumbleweed go to www.tumbleweed.com or call 650-216-2000.

About Sigaba
Secure Data in Motion Inc., dba Sigaba, is the leading provider of secure message management solutions, including e-mail, instant messaging and document delivery, for the enterprise market. Headquartered in San Mateo, California, the company was recently named by SC Magazine and CIO Magazine as the “Company to Watch.” Sigaba Secure E-mail, Sigaba Secure Statements and Sigaba Secure Instant Messaging are the most flexible, easy-to-use solutions for securing all corporate, financial services, healthcare and government communications over the Internet and wireless networks. The company’s Liberty-enabled and SAML-compliant standards-based solutions support next generation messaging; secure messages can be sent to virtually anyone, anywhere, without requiring users to download special software. Sigaba (sï-gá-ba) takes its name from the SIGABA encryption machine, used by the U.S. during and after World War II. It was the only device of its kind that was never compromised by the enemy. Additional information about Sigaba can be found at http://www.sigaba.com or by calling 1-800-475-8226.

Safe Harbor Statement
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 development and enforcement of the Tumbleweed patent portfolio 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 June 4, 2003, Form 10-Q filed November 14, 2003, and Form S-3/A filed December 19, 2003. More information about factors that could affect eBay Inc.'s operating results is included in the company's most recent annual report on Form 10-K and quarterly reports on Form 10-Q, copies of which may be obtained by visiting the company's investor relations site at http://investor.ebay.com.

Neither Tumbleweed nor eBay assumes any obligation to update information contained in this press release, including for example its guidance regarding future performance, which represents each company's respective expectations only as of the date of this release and should not be viewed as a statement about such company's expectations after such date. Although this release may remain available on either company's website or elsewhere, its continued availability does not indicate that either company is reaffirming or confirming any of the information contained herein.
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