Attribute-Based Encryption for Control Access Privileges for Cloud Data with Anonymity

Abstract

Cloud computing is a computing concepts, which enables when required and low maintenance usage of resources, but the data is shares to some cloud servers and various privacy related concerns emerge from it. Various schemes like based on the attribute-based encryption have been developed to secure the cloud storage. Most work looking at the data privacy and the access control, while less attention is given to the privilege control and the privacy. In this paper, we present a privilege control scheme Anonymity Control to address and the user identity privacy in existing access control. Anonymity Control decentralizes the central authority to limit the identity leakage and thus achieves partial anonymity. It also generates the file access control to the privilege control, by which privileges of all operations on the cloud data can be managed in a proper manner. We present the Anonymity Control-F, which prevents the identity and achieve the anonymity. Our security analysis shows that both Anonymity Control and Anonymity Control-F are secure under the Diffie–Hellman assumption and our performance evaluation exhibits the feasibility of our schemes.