Attributed Based Provable Data Possession in Public Cloud Storage

Abstract

Cloud storage is now an important development trend in information technology. To ensure the integrity of data storage in cloud storing, researchers have present some provable data possession (PDP) schemes. In some cases, the ability to check data possession is delegated by data owners. Hence, the delegable provable data possession and proxy provable data possession are proposed. However the PDP schemes are not secure since the proxy or designated verifier stores some delegation information in cloud storage servers. In this paper, we propose an attribute based provable data possession scheme, which utilizes attribute based signature to construct the homomorphic authenticator. In the scheme, the homomorphic authenticator contains an attribute strategy. Only the verifier, who satisfied the strategy, can check the data integrity. In particular, the cloud storage service (CSS) in our scheme is stateless and independent of verifier. Moreover the scheme has more security features, including strong anonymity, unlink ability and conspiring to resistance.