VirnetX Updates its Essential Patent Declaration for 4G/LTE

Adds More 3GPP Specifications to its Declaration to ETSI and ATIS.

ZEPHYR COVE, Nevada – August 13, 2012, press-release, via LTE Depot – VirnetX Holding Corporation (NYSE MKT: VHC), an Internet security software and technology company, announced today that on August 10, 2012, it submitted updates to its licensing declaration to European Telecommunications Standards Institute (ETSI) and the Alliance for Telecommunications Industry Solutions (ATIS). VirnetX has identified additional developing specifications in the 3GPP LTE, SAE project to which VirnetX’s patents and patent applications are or may become essential. The following additional specifications are now included in the declaration:

1. 3GPP TS 26.237: “IP Multimedia Subsystem (IMS) based Packet Switch Streaming (PSS) and Multimedia Broadcast/Multicast Service (MBMS) User Service; Protocols” Release 11 or Prior Release
   
2. 3GPP TS 24.228: “Signaling flows for the IP multimedia call control based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP); Stage 3” Release 5 or Prior Release
   
3. 3GPP TS 23.228: “IP Multimedia Subsystem (IMS); Stage 2” Release 11 or Prior Release VirnetX has now identified 10 specifications or developing specifications in the 3GPP LTE SAE project to which its patents and patent applications are or may become essential.

VirnetX is willing, upon request, to make available a non-exclusive license with respect to necessary claims that have issued in or may issue from VirnetX’s identified patents and patent applications for these 10 specifications identified in its updated declaration, to the extent the specifications are adopted as a final standard, subject to the conditions set forth in the VirnetX’s April 27, 2011 Statement of Patent Holder submitted to ETSI and ATIS. “Security is a key component in a large number of mandatory or normative specifications in the LTE project,” said Kendall Larsen, VirnetX CEO and President. “We believe this is a significant step for the Company as we continue to execute on our long-term strategy to become a key provider of technology and intellectual property required for making communications secure over the 4G/LTE networks.”

About VirnetX

VirnetX Holding Corporation is an Internet security software and technology company with patented technology for secure communications including 4G LTE security. The Company’s software and technology solutions, including its secure domain name registry and GABRIEL Connection Technology™, are designed to facilitate secure communications and 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 20 U.S. and 26 international patents and over 100 pending applications. For more information, please visit www.virnetx.com.