SecureTransport 4.6 Provides Secure and Reliable Managed File Transfer

Enhanced security and scalability capabilities address key concerns of enterprise IT organizations transferring files over the Internet

Redwood City, CA -- September 19, 2006 -- Continuing to meet the security demands of enterprise IT organizations, Tumbleweed today announced the availability of Tumbleweed SecureTransport 4.6, the latest version of Tumbleweed’s award-winning enterprise managed file transfer solution.

Tumbleweed SecureTransport™ is a leading managed file transfer solution providing secure, reliable, manageable, and auditable file exchange inside and outside of your organization. Financial networks use SecureTransport to move billions of dollars in financial transactions daily, and at least eight of the top 10 U.S. banks use it to serve tens of thousands of corporate customers. Health care providers, payors, producers, and clearing houses are linked through SecureTransport, which provides a single, integrated, and secure file transfer infrastructure for transferring private health information (PHI). Government agencies leverage SecureTransport to share sensitive documents with other agencies.

“It is a business requirement that today’s enterprise organizations effectively manage and secure data movement across the Internet. Regulatory mandates such as the Sarbanes-Oxley Act and the Health Insurance Portability and Accountability Act (HIPAA) are forcing companies to document all their business processes and more securely manage how data moves within an organization,” said Frank Kenney, principal research analyst with Gartner. “To address these challenges, organizations will require managed file transfer (MFT) solutions that effectively control all aspects of data movement in a secure and manageable way. Vendors that can address key managed file transfer priorities such as security, scalability, functionality and manageability will be best positioned to lead the market.”

According to a recent survey commissioned by Ziff Davis on behalf of Tumbleweed, security-related issues represent the top four concerns that organizations have about moving files over the Internet. The findings revealed that organizations are concerned about file transfers compromising security and data. Loss of customer, partner, and personal data, loss of control over proprietary information, and failure to meet security audit requirements are the top organizational concerns about transferring files. Respondents also emphasized that an easy to use appliance and file transfer protocol (FTP) strategy, like the new SecureTransport 4.6, is “extremely” valuable.

Tumbleweed SecureTransport 4.6 support for OpenPGP encryption allows for automatic signature validation and supports a variety of standard protocols, including HTTP, FTP, SFTP, SCP, and AS2. Scalable to tens of thousands of users, SecureTransport 4.6 ships with a streamlined administrative user interface providing improved visibility and management of accounts, file transfers, cluster operations, and reporting features.

About Tumbleweed SecureTransport

Tumbleweed SecureTransport is a leading enterprise-managed file-transfer solution. It enables the exchange of valuable and sensitive data over the Internet in a secure and reliable manner. SecureTransport is a centrally managed, client-server solution supporting a broad set of secure, open-standard file-transfer protocols, including FTP, FTPS, HTTP, HTTPS, SSH (SFTP and SCP), and AS2. SecureTransport is available as an appliance or software solution.

About Tumbleweed Communications Corp.

Tumbleweed provides security solutions for e-mail protection, file transfers, and identity validation that allow organizations to safely conduct business over the Internet. For additional information about Tumbleweed go to or call 650-216-2000.

Tumbleweed, the Arrows logo, MailGate, SecureTransport and Validation Authority are either registered trademarks or trademarks of Tumbleweed Communications Corp. in the United States and/or other countries. All other trademarks are the property of their respective owners.

Safe Harbor Statement

Tumbleweed cautions that forward-looking statements contained in this press release are based on current plans and expectations as of the date of this 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 functionality and performance of SecureTransport 4.6. 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 16, 2006 and Form 10-Q filed August 8, 2006.

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.

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