Complete Privacy Preserving Auditing for Data Integrity in Cloud Computing

Homomorphic encryption has long been acclaimed solution for data security and privacy problems in cloud computing. However, the high complexities of operations associated with the existing schemes have prohibited them from being used for practical applications. In this paper we propose a new protocol for verifying the integrity of the data stored at the remote cloud server, based on a practical version of integers based homomorphic encryption. The proposal is the first attempt in combining the data integrity and confidentiality in new ways to provide an impending solution. The practicality of the resulting scheme is demonstrated through exhaustive experimentation while the security of the scheme is proved with thorough cryptanalysis.