PROPOSED SYSTEM: We firstly present a circuit ciphertext-policy attribute-based hybrid encryption with verifiable delegation scheme. General circuits are used to express the strongest form of access control policy. The proposed scheme is proven to be secure based on k-multilinear Decisional Diffie-Hellman assumption. On the other hand, we implement our scheme over the integers. During the delegation computing, a user could validate whether the cloud server responds a correct transformed ciphertext to help him/her decrypt the ciphertext immediately and correctly. ADVANTAGES OF PROPOSED SYSTEM: The generic KEM/DEM construction for hybrid encryption which can encrypt messages of arbitrary length. They seek to guarantee the correctness of the original ciphertext by using a commitment. We give the anti-collusion circuit CP-ABE construction in this paper for the reason that CPABE is conceptually closer to the traditional access control methods.
PROPOSED SYSTEM: We firstly present a circuit ciphertext-policy attribute-based hybrid encryption with verifiable delegation scheme. General circuits are used to express the strongest form of access control policy. The proposed scheme is proven to be secure based on k-multilinear Decisional Diffie-Hellman assumption. On the other hand, we implement our scheme over the integers. During the delegation computing, a user could validate whether the cloud server responds a correct transformed ciphertext to help him/her decrypt the ciphertext immediately and correctly. ADVANTAGES OF PROPOSED SYSTEM: The generic KEM/DEM construction for hybrid encryption which can encrypt messages of arbitrary length. They seek to guarantee the correctness of the original ciphertext by using a commitment. We give the anti-collusion circuit CP-ABE construction in this paper for the reason that CPABE is conceptually closer to the traditional access control methods.