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System and method for utilizing information in publicly broadcast signals for shared secret purposes

  • US 20050033995A1
  • Filed: 08/06/2004
  • Published: 02/10/2005
  • Est. Priority Date: 08/08/2003
  • Status: Abandoned Application
First Claim
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1. A system for utilizing information in publicly broadcast information as a synchronization source for shared secret purposes comprising:

  • a token device capable of receiving publicly broadcast information, the token device generating responses based on the publicly broadcast information; and

    a server capable of receiving publicly broadcast information and receiving responses from the token device, the server generating challenges based on the publicly broadcast information and verifying the responses from the token to authenticate the token.

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