Anonymous Group Message Authentication Protocol for LTE-based V2X Communications

Correspondence Dongxiao Liu, Department of Electrical and Computer Engineering, University of Waterloo, Waterloo Canada N2L 3G1 Email: [email protected] Cellular technologies, in particular the current long-term evolution (LTE) and future 5G, are suitable for implementing vehicle-to-everything (V2X) services, due to the existing network infrastructure, device-to-device (D2D) communication capability, and guaranteed end-to-end delay. In LTE-based V2X (LTE-V), vehicle grouping plays an important role for improving LTE spectrum utilization and providing group-oriented proximity-based services (ProSe). However, the flourishing of LTE-V group communications introduces unique privacy challenges. In this letter, the state-of-art standardization and research efforts are first reviewed, and their limitations are identified on achieving trajectory privacy for LTE-V group communications. Then, an efficient and anonymous group message authentication protocol is proposed to support message batch verification. Security analysis and performance evaluation demonstrate the feasibility of the proposed protocol.