A cloud storage system, consisting of a collection of storage servers, provides long-term storage services over the Internet. One of the important concerns that need to be addressed is to assure the customer of the integrity i.e. correctness of his data in the cloud. In this paper we provide a scheme which gives a proof of data integrity in the cloud which the customer can employ to check the correctness of his data in the cloud. In addition this system contains secure data forwarding. A user forward his data in the storage servers to another user without retrieving the data back. Our System use multi cloud storage for storing user data. The multi cloud storage system holds an economical distribution of data among the available Service Providers (SP) in the market, to provide customers with data availability as well as secure storage. Our method fully integrates SP selection, encrypting, encoding, forwarding and integrity verification.
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