Tumbleweed Data Security Expert Available for Interviews on Lexmark File-Sharing Data Breach

Tumbleweed Communications Corp. (NASDAQ:TMWD): WHAT:   Among the more than 40 high-profile data breaches that have occurred since the first of the year, on Friday Lexmark International disclosed that it suffered a data breach by inadvertently exposing employee's personal information on a file sharing site. The file sharing site was used to share employee data with a third party, and was accessed in late January, exposing the names, birthdates, addresses and social security numbers of an undisclosed number of employees.   The breach illustrates the growing need for organizations to have a comprehensive content security strategy - particularly when sharing large files. According to some studies, accidental data loss is the fourth largest concern among CIOs, and the vast majority of similar breaches were due to lost or stolen CDs, thumb drives and laptops.   WHO: Dr. Taher Elgamal, Chief Technology Officer, Tumbleweed(R) Communications Corp.   Dr. Elgamal is a leading expert in computer, network and information security, recognized as the "inventor of SSL," the technology used to secure internet communications.   Available to discuss: -- Steps on developing an enterprise strategy for content security both internally and with third parties. -- The growing need for organizations to mitigate the risk of data breaches via FTP, file transfer and file sharing, in response to this avoidable breach. -- The top ways organizations are leaving themselves vulnerable for similar types of data breaches. -- Best practices for ensuring an organization's data is secure from these types of breaches.   WHEN: Immediately   WHERE: Available via phone or for on-camera interviews at various San Francisco Bay Area locations. 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 availability of specific Tumbleweed personnel for interviews, as well as the content of any such interviews. 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 14, 2007 and Form 10-Q filed November 7, 2007. 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 14 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.