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Anonymity revocation

  • US 20050268103A1
  • Filed: 05/25/2005
  • Published: 12/01/2005
  • Est. Priority Date: 05/28/2004
  • Status: Active Grant
First Claim
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1. A method for enabling a trusted entity to identify a user computer with a security module within a system comprising further an attester computer and a verification computer, the method comprising at the user computer the steps of:

  • receiving from the attester computer an attestation value, the attestation value being derived from a security module public key and an identifying value;

    deriving under use of the security module a user attestation-signature value from the attestation value;

    computing an encryption by the user computer under use of a trusted-entity public key and a module-generated-identifier value, the module-generated-identifier value relating to the identifying value; and

    providing the user attestation-signature value and the encryption to the verification computer for verification, wherein the trusted entity having a trusted entity secret key is able to derive the module-generated-identifier value from the encryption, the module-generated-identifier value being usable to identify the user computer with the security module.

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