The increasing popularity of cloud storage services has lead companies that handle critical data to think about using these services for their storage needs. The paper presents a way to implement Third Party Auditor which not only checks the reliability of Cloud Service Provider but also checks the consistency and accountability of data The architecture shifts data, applications and development environments to large data centers thereby providing storage software and platform services online

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... design is based on Elliptic Curve Cryptography and Sobol Sequence in Our method allows third party auditor to periodically verify the data integrity stored at CSP without retrieving original data we make use of Public-Auditing. We propose a way in which the Merkle Hash Tree (MHT) used in a method called RSAS is made dynamic by using the concept of relative index to compute the index of leaf node quickly and a dynamic operation scheme based on this tree structure for cloud storage the proposed scheme aims at keeping the user data integrated and support data restore. The system also reduces the server computation time when compared with previous systems the use of homomorphism in multi-clouds due to its ability to reduce security risks using the enhanced modified festal technique.