Cryptographic Primitive to Enable a User to Check And Update Integrity Of Outsourced Files In a Cloud Server

We present the idea of deduplicatable powerful evidence of storage and propose a proficient development called DeyPoS, to accomplish dynamic PoS and secure cross-client deduplication, all the while. Thinking about the difficulties of structure decent variety and private label age, we abuse a novel instrument called Homomorphic Authenticated Tree (HAT). We demonstrate the security of our development, and the hypothetical examination and test comes about demonstrate that our development is efficient in practice