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Research Article Open Access
we propose in this paper a flexible distributed storage integrity auditing mechanism, utilizing the homomorphism token-pre computation and distributed erasure-coded data. The proposed configure users to audit the cloud storage with very lightweight communication and computation cost. The result auditing not only provides secure cloud storage correctness assurance, but also at the same time achieves fast data error localization. Considering the cloud data are motion in nature, the proposed design further supports secure and efficient dynamic operations on outside sourced data, including block modifying, deleting, and append. Analysis shows the proposed scheme is highly efficient and flexible against complex failure, malicious data modification attack, and even server colluding attacks. It includes file splitting process, which means storing of data into multiple servers .Extensive security and performance analysis shows the proposed schemes are provably secure and highly efficient. Here the data or applications are processed in the cloud are taken in the form of tokens or small blocks of data.