Tumbleweed Presenting Two Sessions at RSA Conference 2008

Tumbleweed® Communications Corp. (NASDAQ:TMWD), an industry leader in managed file transfer and email security, today announced that company executives will present insights into the latest security trends at the RSA Conference in San Francisco, April 7-11. Tumbleweed executives will be discussing some of the most pressing issues affecting enterprises during two separate sessions, one on encryption and the other on logical and physical access control. On Wednesday, April 9, at 8 a.m., Dr. Taher Elgamal, CTO of Tumbleweed, also known as the "Inventor of SSL,” will lead a Peer to Peer discussion entitled "Creating a Clear Enterprise Encryption Strategy.” Elgamal will lead participants in a discussion about maximizing encryption strategies to fit enterprise security plans. On Thursday, April 10, at 10:40 a.m., Tumbleweed’s vice president of product management, Joe Fisher, will moderate a panel about identity validation entitled, "Two for One: Keys to Consolidating Logical and Physical Access Control.” Fisher is joined by panelists Michael Hejtmanek, CEO of Enterprise Air, and John Thielens, VP of Technology for Tumbleweed, to discuss the move toward a consolidated access management program, as well as strategies for managing physical and logical access simultaneously. Additionally at RSA, Tumbleweed will demonstrate their new FTP Analyzer at their booth #2232. The FTP Analyzer is a free diagnostic tool that enables organizations to identify all FTP traffic on their network, including unsecured and rogue traffic, to get ahead of any risks presented by unsecured FTP. FTP is the cheapest, simplest and most versatile method for sharing large data files over the Internet, yet it introduces security challenges as well-intentioned employees turn to FTP for transmission of business-critical data. RSA Conference 2008 will be held on April 7-11, at the Moscone Center in San Francisco. More details about the RSA Conference can be found here: http://www.rsaconference.com/2008/US/home.aspx. SAFE HARBOR STATEMENT Tumbleweed cautions that forward-looking statements contained in this press release are based on plans and expectations as of the date of the press release, 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 appearance of any specific Tumbleweed employees at the RSA Conference, the encryption and access management strategies discussed by Tumbleweed at the RSA Conference, and the functionality and features of FTP Analyzer. 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 17, 2008. Tumbleweed assumes no obligation to update information contained in this press release. Although this release may remain available on Tumbleweed’s website or elsewhere, its continued availability does not indicate that Tumbleweed is reaffirming or confirming any of the information contained herein. About Tumbleweed Tumbleweed Communications Corp. (NASDAQ:TMWD), an industry leader in managed file transfer and email security, provides enterprise-class solutions to organizations of all sizes. Tumbleweed’s innovative products enable organizations to effectively manage and protect business-critical Internet communications, with capabilities that span secure file transfer, encryption, data loss prevention, and email security. Tumbleweed has more than 3,200 customers worldwide, including blue-chip companies across an array of industries such as Technology, Retail, Finance, Healthcare, Manufacturing, Consumer Packaged Goods, Telecom, Energy, and the U.S. Government. The world’s most security conscious organizations rely upon Tumbleweed technology including Bank of America Securities, JP Morgan Chase & Co., the U.S. Food and Drug Administration, and the U.S. Department of Defense. Our award-winning products build on 15 years of R&D and 27 security patents in the U.S. alone – many of which are licensed by other security vendors. More information can be found at www.tumbleweed.com. Tumbleweed is a registered trademark of Tumbleweed Communications Corp. in the United States and/or other countries. All other trademarks are the property of their respective owners.