Apparatus and method for direct anonymous authentication from bilinear maps

摘要

PROBLEM TO BE SOLVED: To provide a method and apparatus for anonymous attestation.;SOLUTION: The method includes the steps of: creating a public/private key pair for a trusted membership group defined by an issuer; and assigning a unique secret signature key to at least one member device of the trusted membership group defined by the issuer. A member uses the assigned signature key to sign a message received as an authentication request to verify membership within the trusted membership group. A group digital signature of the member is verified using the public key of the trusted membership group. A verifier of the digital signature is able to authenticate that the member is an actual member of the trusted membership group without requiring the disclosure of unique identification information of the member or the private member key to maintain anonymity.;COPYRIGHT: (C)2009,JPO&INPIT