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Key generation method for communication session encryption and authentication system

  • US 20050050328A1
  • Filed: 09/02/2003
  • Published: 03/03/2005
  • Est. Priority Date: 09/02/2003
  • Status: Active Grant
First Claim
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1. A method for producing ephemeral encryption keys at a first station for use in a communication session with a second station, comprising:

  • assigning an ephemeral session key in said first station, in response to a request received by said first station during a session random key initiation interval for use in a first exchange of said plurality of exchanges;

    associating, in said first station, a set of ephemeral intermediate data random keys with said request for use in said plurality of exchanges;

    sending at least one message carrying said session key to the second station, and receiving a response from the second station including a shared parameter, which is shared between the first station and the second station, or between the first station and a user at the second station, encrypted using said session random key verifying receipt of the session random key; and

    sending, after verifying receipt of the session random key at the second station, at least one message carrying an encrypted version of one of said set of ephemeral intermediate data random keys encrypted to be accepted as an encryption key for the session.

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