Efficient Privacy-Preserving Authentication Protocol for Mobile Cloud Computing Services

To address the problems of mutual authentication and privacy preservation in mobile cloud computing (MCC) services, an efficient and provably secure privacy-preserving authentication protocol, based on an identity-based signature technique, is proposed for MCC services, achieving authentication without the help of a trusted third party. Additionally, because a multi-server authentication technique has been employed in the proposed scheme, mobile users can access all registered servers, which are registered only once at the registration centre. In the proposed scheme, time-consuming operations such as bilinear pairings and map-to-point hash are avoided in the resource-constrained mobile device. Thus, the running time of our scheme in the mobile device is 45.242 s, and the computational efficiency is approximately twice as fast as existing related schemes. Security analysis shows that our scheme can provide a variety of security features, such as user anonymity and untraceability. Moreover, it can resist wrong password loginand update attack © 2019, Editorial Department of Journal of Southwest Jiaotong University. All right reserved.