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  1. Authentication Protocol Using a Multi-Factor Asymmetric Key Pair.  Ravi Sandhu, Brett Schoppert, Ravi Ganesan, Mihir Bellare and Colin deSa.  USA Patent 7,386,720.  June 10, 2008.
  2. System and Apparatus for Storage and Transfer of Secure Data on Web.  Ravi Sandhu and Joon Park.  USA Patent 7,293,098.  November 6, 2007. (Continuation of 6,985,953.)
  3. Method and System for Authorizing Generation of Asymmetric Crypto-Keys.  Ravi Sandhu, Colin deSa and Karuna Ganesan.  USA Patent 7,149,310.  December 12, 2006.
  4. System and Method for Authentication in a Crypto-System Utilizing Symmetric and Asymmetric Crypto-Keys.  Ravi Sandhu, Colin deSa and Karuna Ganesan.  USA Patent 7,069,435.  June 27, 2006.
  5. System and Method for Generation and Use of Asymmetric Crypto-Keys Each Having a Public Portion and Multiple Private Portions.  Ravi Sandhu, Colin deSa and Karuna Ganesan.  USA Patent 7,065,642.  June 20, 2006.
  6. One Time Password Entry to Access Multiple Network Sites.  Ravi Sandhu, Colin deSa and Karuna Ganesan.  USA Patent 7,055,032.  May 30, 2006.
  7. Secure Communications Network With User Control of Authenticated Personal Information Provided to Network Entities.  Ravi Sandhu, Colin deSa and Karuna Ganesan.  USA Patent 7,017,041.  March 21, 2006.
  8. System and Apparatus for Storage and Transfer of Secure Data on Web.  Ravi Sandhu and Joon Park.  USA Patent 6,985,953.  January 10, 2006.
  9. A System and Method for Crypto-key Generation and Use in Cryptosystem.  Ravi Sandhu, Colin deSa and Karuna Ganesan.  USA Patent 6,970,562.  November 29, 2005.
  10. High Security Cryptosystem.  Ravi Sandhu, Colin deSa and Karuna Ganesan.  USA Patent 6,940,980. September 6, 2005.
  11. A System and Method for Password Throttling.  Ravi Sandhu, Colin deSa and Karuna Ganesan.  USA Patent 6,883,095. April 19, 2005.