EFFICIENT DECENTRALIZED ARCHITECTURE USING ABE SCHEME

Abstract

In an open communication environment, such as internet, cloud, distributed systems, sensitive data must be encrypted prior to being transmitted. Encryption schemes are employed to protect confidentiality of sensitive data. However traditional encryption schemes cannot express complex access policy. Also the center must know all the public keys of the receiver. Decentralized attribute-based encryption (ABE) is an efficient encryption scheme and can express complex access structure. This scheme eliminates the heavy communication cost and the need for collaborative computation in the setup stage. Furthermore, every authority can join or
leave the system freely without the necessity of re-initializing the system. In the existing system the system requires collaboration among multiple authorities to conduct the system setup and attributes of the user can be easily collected by tracing his GID (Global Identifier). In our system we are proposing a decentralized ABE scheme to protect the user’s privacy by tying all his secret
keys to his identifier thus resisting the collusion attack. In our system only authorized user can decrypt the data as the system is provided with strong Access Control. The protocol of the system is very flexible to operate and scalable with the growth of data sharers.