A Presumable Data Retentive Framework for Multi Cloud

Cloud Storage or storage outsourcing is a rising trend where the cloud storage service provides a comparably low-cost, scalable, position-independent platform for storing client’s data. This archival storage guarantees the authenticity of data on storage server, but does not guarantee for the tampering of data (modifications or deletions, to the data).Thus, the problem for proving the integrity of the data stored at the third party cloud service providers has increased its attention. This work defines a framework for the efficient construction of data possession at the cloud storage servers dynamically. This scheme is considered for a hybrid cloud in which multiple cloud storages servers are considered, based on a cryptographic technique Interactive Proof System-multi-proved Zero knowledge proof system. This system is based on homomorphic verifiable response from multiple cloud servers, and the stored data is indexed using collision resistant hash index hierarchy. This scheme satisfies the security properties of completeness, knowledge soundness, and zero-knowledge system. This work also presents an optimal method for minimizing the computation, communication costs of storage service providers.