Security Enhancement and Data Integrity Checking In Multi- Cloud Storage

Generally the cloud server act as a container which contains data or information. Providing Security in cloud is becoming a difficult task now days. Remote data integrity checking is of crucial importance in cloud storage. It can make the clients verify whether their outsourced data is kept intact without downloading the whole data. In some application scenarios, the clients have to store their data on multi-cloud servers. At the same time, the integrity checking protocol must be efficient in order to save the verifier’s cost. From the two points, we propose a novel remote data integrity checking model: ID-DPDP (identity-based distributed provable data possession) in multi-cloud storage. In addition to the structural advantage of elimination of certificate management, our ID-DPDP protocol is also efficient and flexible.