Description
EPID is a digital signature scheme with special properties One group public key corresponds to multiple private keys, Each unique private key can be used to generate a signature, Signature can be verified using the group public key. The Direct Anonymous Attestation (DAA) is a cryptographic protocol which enables the remote authentication of a trusted platform module whilst preserving the user’s privacy. The DAA protocol is based on three entities and two different steps. The entities are the TPM platform, the DAA Issuer and the DAA verifier. The issuer is charged to verify the TPM platform during the Join step and to issue DAA credential to the platform. The platform uses the DAA credential with the verifier during the Sign step. and the verifier can verify the credential without attempting to violate the platform’s privacy. The protocol also supports a blacklisting capability so that verifiers can identify attestations from TPMs that have been compromised. In this paper we propose a new scheme of Enhanced Privacy id here the user to prove the membership both the prover and verifier needs need to perform computation in revocation list. Our construction of EPID is efficient and secure under the RSA and the decisional Diifie Hellman assumption.
Tags: 2012, Application projects, Dot net