An Attribute Based Encryption Middleware with Rank Revocation for Mobile Cloud Storage

The Attribute Based Encryption (ABE) algorithm can be used to realize fine grained access control for the mobile cloud storage. In ABE, the decryption algorithm has high complexity and the rank revocation is difficult to be implemented. An ABE middleware with rank revocation is given in this paper. The ABE middleware delegate the ABE decryption operation for the resource constrained mobile device. The attribute authority can revoke the user’s rank through this middleware instantly with fine-grained control and the revocation process may not affect any other users. The ABE middleware is implemented and experiment results show that the ABE middleware improves ABE decryption performance about 30 times.