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Method and apparatus for extinguishing ephemeral keys

  • US 20020136410A1
  • Filed: 03/26/2001
  • Published: 09/26/2002
  • Est. Priority Date: 03/26/2001
  • Status: Abandoned Application
First Claim
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1. A method for performing ephemeral decryption comprising:

  • associating an expiration time with at least an ephemeral decryption key of an ephemeral key pair comprising said ephemeral decryption key and an ephemeral encryption key;

    storing at least said ephemeral decryption key in a memory within a tamper resistant cryptographic processor unit such that said ephemeral decryption key is not accessible external of said tamper resistant cryptographic processor unit;

    receiving at said tamper resistant cryptographic processor unit from a first node an ephemeral message encrypted with said ephemeral encryption key; and

    decrypting said ephemeral message within said tamper resistant cryptographic processor unit using said ephemeral decryption key to form a decrypted ephemeral message in the event said ephemeral message is associated with a message time that is prior to said expiration time.

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