Flexible Authentication with User Revocation for DAC in Cloud

We suggest a decentralized access management theme for safe information storage and versatile authentication for file sharing. The cloud authorizes the credibility of the sequences while not revealing the user’s identity for storing information. There’s a feature of access management during which solely legal users will rewrite the file hold on in cloud. The theme provides user revocation that prevents replay attacks on file hold on within the cloud. Additionally the corrupted files will be recovered by string matching formula. Also the file owner will have log about when the file has been edited by other users.