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System, apparatus and method for replacing a cryptographic key

  • US 20040218763A1
  • Filed: 01/05/2004
  • Published: 11/04/2004
  • Est. Priority Date: 01/07/2003
  • Status: Active Grant
First Claim
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1. A method for authentication in a public cryptographic system comprising:

  • creating a first private key and corresponding first public key;

    creating a second private key associated with the first private key and creating a second public key corresponding to the second private key;

    outputting the second private key once such that it can be re-created;

    outputting the second public key when outputting the first public key; and

    using the first private key for authentication.

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