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LOCALIZED NETWORK AUTHENTICATION AND SECURITY USING TAMPER-RESISTANT KEYS

  • US 20080104399A1
  • Filed: 12/13/2007
  • Published: 05/01/2008
  • Est. Priority Date: 10/08/2002
  • Status: Active Grant
First Claim
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1. A method of authenticating computing devices on a communications network comprising the steps of:

  • receiving a first challenge from a computing device, wherein said first challenge comprises an encrypted first random number and a unique identifier associated with said computing device;

    obtaining a first secret cryptographic key associated with said unique identifier;

    generating a second random number;

    decrypting said first random number with said first secret cryptographic key;

    encrypting said second random number with said first secret cryptographic key; and

    transmitting a second challenge to said computing device, wherein said second challenge comprises said encrypted said second random number.

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