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Method and system of securely escrowing private keys in a public key infrastructure

  • US 6,931,133 B2
  • Filed: 09/03/2002
  • Issued: 08/16/2005
  • Est. Priority Date: 09/03/2002
  • Status: Expired due to Term
First Claim
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1. A method for escrowing a private key in a public key infrastructure, comprising:

  • creating a key pair including a private key and a public key;

    creating a session key;

    encrypting the private key using the session key;

    creating a session key mask;

    storing the encrypted private key and the session key mask;

    creating a masked session key by exclusive-ORing the session key and the session key mask;

    deleting the session key; and

    sending the masked session key and a digital certificate to a secondary site.

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