Secure Attribute Based Mechanism through Access cipher policy in Outsourced Cloud Data

Attribute-based encryption (ABE) is a standard encryption that allows users to encrypt and decrypt data based on user attributes. I t is extension o f attribute set based encryption to improve scalability and flexibility w hile at the same time Inherits the feature of fine grained access control of ABE.It is flexible access control of encrypted data stored in the cloud. It is using access polices and attributes associated with private keys and cipertext. The drawbacks of this scheme are that decryption involves expensive pairing operations. It does not guarantee the correctness of transformation done by the cloud. We consider a new requirement of ABE with outsourced decryption: verifiability. This verifiability used guarantees that a user can efficiently check if the transformation is done correctly. The HMAC algorithm is used to verify data integrity process. In this research focuses on secure and verifiable. The main aim of this paper is without relying on random oracles.