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Privacy-Preserving Data Sharing for Dynamic Groups in the Cloud: A Survey

S.Mythili, M.Velmurugan

In recent years, the use of cloud computing in real life applications has increased rapidly. It provides an efficient solution for sharing group resource among cloud users. Sharing data in a multi-owner manner while preserving data and identity privacy from an un-trusted cloud is still a challenging issue, due to the frequent change of the membership. This paper surveys new granted users can directly decrypt data files uploaded before their participation without contacting with data owners. This scheme is able to support dynamic groups efficiently. User revocation can be achieved through a novel revocation list without updating the secret keys of the remaining users. Finally these papers summarize and conclude with the different algorithms and technique