The Research On Direct Anonymous Attestation Scheme Based On Dynamic Accumulator

With the development of the network technology, breaking user privacy malicious code attacks become the biggest security threat to the Internet. The main reason about this threat generated is because the computer architectures do not have the ability of malicious code attacks the immune. Therefore, the PC terminal manufacturers presented the concept of trusted computing, by introducing Trusted Computing Module in computing and communication systems, enhanced security computer architecture, and promoted the use of trusted computing technology industry specifications to build a common terminal hardware platform.Direct Anonymous Attestation (DAA) scheme is used to solve the issue of remote authentication of trusted computing. The key of this issue is that the trusted platform authenticated remotely the correctness and reliability of its identity, while ensured the trusted platform not to disclose its identity information. DAA scheme is adopted by Trusted Computing Group as TPM v1.2scheme to solve the problem of remote authentication. Since DAA scheme proposed, it had been widely studied in domestic and overseas.The mainstream research direction divided into the improve--ment of the security and privacy of DAA scheme and proposing DAA scheme under different computing environments.In this paper, based on made a analysis of the disadvantage of DAA scheme, by using of the knowledge of cryptography, made an improvement of DAA scheme, the main research work done the following:Firstly, this paper made an introduction on the DAA scheme, analysis of the advantages and disadvantages of DAA scheme. Then, against the disadvantage of DAA scheme lack of the revocation ability, and the weakness of the revocation ability in current DAA scheme, by using of dynamic accumulator, solved the problem of revoking members.Achieved the proposed program of FSD-DAA computational overhead on the revocation of members independent of the DAA scheme members or the number of members to be revoked.Then, by updating the DAA signing private key, achieved the forward security.Moveover, with the work at dynamic accumulator and forward security, fulfilled the backward unlinkability of signature.At last, made the analysis of FSD-DAA scheme on security and efficiency, FSD-DAA scheme met the required security, and the revocation efficiency is better than these scheme mentioned in the paper.