Designated-Verifier Provable Data Possession in Public Cloud Storage

Abstract

Cloud storage is now an important development trend in information technology. However, information security has become an important problem to impede it for commercial application, such as data confidentiality, integrity, and availability. In this paper, we propose designated verifier provable data possession (DV-PDP). In public clouds, DV-PDP is a matter of crucial importance when the client cannot perform the remote data possession checking. We study the DV-PDP system security model and use ECC-based homomorphism authenticator to design DV-PDP scheme. The scheme removed expensive bilinear computing. Moreover in DV-PDP scheme, the cloud storage server is stateless and independent from verifier, which is an important secure property in PDP schemes. Through security analysis and performance analysis, our scheme is provable secure and high efficiency.