Efficient Audit Service Outsourcing for Data Integrity in Clouds

Abstract

Every one today use cloud service to store there personal data and even for maintaining the backup of data in case of any hazard . For the benefits Of their own, there do exist various motivations for Cloud Service Providers to behave unfaithfully towards the cloud. However, the fact that clients no longer have physical possession of data indicates that they are facing a potentially formidable risk for missing or corrupted data. To avoid he security risks, audit services are critical to ensure the integrity and availability of outsourced data and to achieve digital forensics and credibility on cloud computing. Provable data possession (PDP), which is a cryptographic technique for verifying the integrity of data without retrieving it at an untrusted server, can be used to realize audit services. Profiting from the interactive zeroknowledge proof system, we address the construction of an interactive PDP protocol to prevent the fraudulence of prover (soundness property) and the leakage of verified data.Diffie–Hellman assumption efficient mechanism with respect to probabilistic queries and periodic verification to reduce the audit costs per verification and implement abnormal detection timely.