An Enhanced Secure Authentication Scheme for Vehicular Ad Hoc Networks Without Pairings

In the recent paper, Nai-Wei Lo and Jia-Lun Tsai mathematically proposed an efficient authentication scheme for vehicular sensor network. It uses elliptic curve cryptography based ID-based signature (IBS) for authentication purpose without pairings. The proposed scheme provides secure authentication in Vehicle-to-RSU (V2R) and RSU-to-Vehicle (R2V) communications. But it does not provide secure Vehicle-to-Vehicle (V2V) communications. It also has few other drawbacks. Hence, we propose a new ID-based authentication scheme without pairings for vehicular networks. It provides secure V2R, R2V and V2V communications with other security features like privacy preservation, message integrity and tracability. In this paper, we first review the authentication scheme proposed by Nai-Wei Lo et al. along with its limitations. Then we illustrate the proposed IBS based authentication scheme without pairings. At last, the performance of the proposed scheme is compared with that of the Nai-Wei Lo et al.’s scheme. NS2 simulation result shows that the proposed scheme has less computation and communication overhead than the latter scheme.