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Secure ephemeral decryptability

  • US 20020191797A1
  • Filed: 06/13/2001
  • Published: 12/19/2002
  • Est. Priority Date: 06/13/2001
  • Status: Active Grant
First Claim
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1. A method for performing secure ephemeral communication comprising:

  • receiving at a first node a triply wrapped value, said value being encrypted with a first encryption key to form a singly wrapped value, said singly wrapped value being encrypted with a second encryption key to form a doubly wrapped value and said doubly wrapped value being encrypted with a third encryption key to form said triply wrapped value;

    decrypting said triply wrapped value using a third decryption key associated with said third encryption key to obtain said doubly wrapped value;

    securely communicating said doubly wrapped value to said second node;

    obtaining a second decryption key having a predetermined expiration time at a second node;

    decrypting said doubly wrapped value using said second decryption key to produce said singly wrapped value if said second decryption key has not expired; and

    securely communicating said singly wrapped value to a third node.

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