Fine-grained access control scheme with user privacy protection in cloud storage systems

Abstract

Based on the actual demands of cloud storage system,a new multi-authority ABE (MA-ABE) scheme is constructed to support user privacy protection and attribute revocation.For enhancing efficiency and alleviatingowner’s computing load，the complex computing works involved in attribute revocation are delegated to a trusted third party orcloud server.The proposed scheme is provably secure under the DBDH assumption.

Keywords

• cloud storage;attribute based encryption;multi-authority;privacy protection;attribute revocation