VirnetX Victorious in Patent Review

All Claims in Key Patents Confirmed by USPTO

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Jun 22, 2010, 09:00 ET

SCOTTS VALLEY, Calif., June 22 /PRNewswire-FirstCall/ -- VirnetX Holding Corporation (NYSE Amex: VHC), an Internet security software and technology company, announced today that on June 16, 2010, the United States Patent and Trademark Office (USPTO) confirmed all claims of VirnetX's U.S. Patent No. 6,502,135 and U.S. Patent No. 7,188,180 are patentable and valid.

U.S. Patent No. 6,502,135, entitled "Agile Network Protocol for Secure Communications with Assured System Availability" and U.S. Patent No. 7,188,180, entitled "Method for Establishing Secure Communication Link Between Computers of Virtual Private Network," were determined to have been infringed by Microsoft at a jury trial in a patent infringement suit that was settled by VirnetX and Microsoft for $200 million on May 17, 2010.

"The validation of these two key patents and all the claims associated with each by the USPTO further validates the importance and strength of our patent portfolio," said Kendall Larsen, VirnetX President and CEO. "Furthermore, this confirms that VirnetX has key patents related to one of the most ubiquitous and important security technologies, Virtual Private Networks."

About VirnetX

VirnetX Holding Corporation, an Internet security software and technology company, is engaged in commercializing its patent portfolio, by developing a licensing program as well as developing software products designed to create a secure environment for real-time communication applications such as instant messaging, VoIP, smart phones, eReaders and video conferencing. The Company's patent portfolio includes over 48 U.S. and international patents and pending applications that were recently declared as essential for 4G security specifications and provide the foundation for the Company's unique GABRIEL Connection Technology. For more information, please visit www.virnetx.com.