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Methods and systems for entropy collection for server-side key generation

  • US 8,589,695 B2
  • Filed: 06/07/2006
  • Issued: 11/19/2013
  • Est. Priority Date: 06/07/2006
  • Status: Active Grant
First Claim
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1. A method comprising:

  • receiving entropy bits from a plurality of remote sources of entropy;

    receiving an identification number associated with a token;

    combining, by a processor, the entropy bits to form a combined stream of bits, wherein a number of bits in the combined stream of bits is based on a profile associated with a subject private key;

    generating a subject key pair based on the combined stream of bits wherein the subject key pair comprises a subject public key and the subject private key;

    encrypting the subject private key with a session key;

    forwarding the encrypted subject private key for delivery to the token;

    deriving a key encryption key based on a server master key and the identification number;

    generating the session key based on the plurality of sources of entropy; and

    encrypting the session key with the key encryption key.

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