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Interoperable cryptographic key recovery system

  • US 5,796,830 A
  • Filed: 07/29/1996
  • Issued: 08/18/1998
  • Est. Priority Date: 07/29/1996
  • Status: Expired due to Term
First Claim
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1. A method of providing, in a manner verifiable by a possessor of a cryptographic key, for the recovery of said key using a plurality of cooperating key recovery agents, comprising the steps of:

  • generating a plurality of shared key recovery values from which said key may be recovered, said key recovery values being generated as a function only of said key and public information;

    encrypting said shared key recovery values under respective keys of said key recovery agents to generate encrypted recovery values; and

    transmitting said encrypted recovery values over a communications channel to make said shared key recovery values available to said key recovery agents, whereby said shared key recovery values may be regenerated from said cryptographic key and said public information by a possessor of said key to verify said encrypted recovery values without requiring additional secret information.

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