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Method and apparatus for efficiently initializing secure communications among wireless devices

  • US 6,886,095 B1
  • Filed: 05/21/1999
  • Issued: 04/26/2005
  • Est. Priority Date: 05/21/1999
  • Status: Expired due to Term
First Claim
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1. A method for initializing secure communications between a first device and a second device, said first and second devices each having a public key of a Certificate Authority and a device certificate, said device certificate having a unique hardware identifier associated with said respective device, and a public key associated with said respective device, said method comprising the steps of:

  • establishing a session between said first device and said second device;

    negotiating two-way session encryption and mutual authentication requirements between said first and said second device;

    exchanging device certificates of said first device and said second device;

    cryptographically verifying the received certificate using the public key of said Certificate Authority;

    exchanging challenges created by each of said first and second devices;

    responding to said respective challenges by signing said received challenge, using the receiving device'"'"'s private key, said private keys residing in the respective protected write-only storage in each said device;

    returning said signed challenges;

    cryptographically verifying that said received challenge signature is of the challenge previously sent by said receiving device;

    establishing a key agreement between said first and second devices; and

    , establishing secure communications if all of said prior verifying steps succeed.

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