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Method and system for securely archiving core data secrets

  • US 6,044,155 A
  • Filed: 12/23/1997
  • Issued: 03/28/2000
  • Est. Priority Date: 06/30/1997
  • Status: Expired due to Term
First Claim
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1. A method of securely storing and recovering data protection keys, comprising the following steps:

  • deriving a client key from a user secret that is supplied by a user during network logon procedures;

    securing user data on a client computer with the client key;

    sending the client key to a network supervisory computer that authenticates network users during user logon procedures;

    encrypting a data combination at the network supervisory computer, the data combination including the client key and a user identification corresponding to a currently authenticated current user of the client computer;

    returning the encrypted data combination to the client computer;

    storing the encrypted data combination at the client computer;

    sending the encrypted data combination to the network supervisory computer in order to recover the client key;

    decrypting the data combination at the network supervisory computer to obtain the client key and the user identification in response to receiving the encrypted data combination from the client computer;

    returning the client key to the client computer only if the obtained user identification corresponds to the currently authenticated user of the client computer.

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