Differential Privilege based Secure Authorized Deduplication Using Public Private Cloud

Abstract—To reduce the amount of storage space and save bandwidth in cloud storage various Data compression techniques are used, Data deduplication is one of the important data compression technique. Data deduplication removes the duplicate copies of repeating data. To encrypt the sensitive data, the convergent encryption technique has been proposed. It is first formal attempt to address the problem of secure authorized data deduplication. Data and the differential privileges of users are considered while duplicate check, thus differing from traditional deduplication systems. Several new deduplication constructions supporting authorized duplicate check in multi cloud architecture are presented here. Security analysis shows that proposed system is secure in terms of definitions specified in the proposed security model. Prototype of proposed authorized duplicate check is implemented and test bed experiments conducted using this prototype. The result shows that proposed authorized duplicate check scheme incurs minimal overhead as compared to normal operations. Keywords—Differential privileges,Secure Deduplication, authorized duplicate check, confidentiality. I