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Mobile Information Systems
Volume 2018 (2018), Article ID 4070283, 11 pages
Research Article

An Efficient V2I Authentication Scheme for VANETs

1College of Computer Science and Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
2College of Computer Science, Chongqing University, Chongqing 400044, China
3School of Cyber Security and Information Law, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
4School of Electronic Engineering, Dublin City University, Dublin, Ireland

Correspondence should be addressed to Shaojiang Deng

Received 27 July 2017; Revised 13 November 2017; Accepted 4 December 2017; Published 1 March 2018

Academic Editor: María Calderon

Copyright © 2018 Yousheng Zhou et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The advent of intelligent transportation system has a crucial impact on the traffic safety and efficiency. To cope with security issues such as spoofing attack and forgery attack, many authentication schemes for vehicular ad hoc networks (VANETs) have been developed, which are based on the hypothesis that secret keys are kept perfectly secure. However, key exposure is inevitable on account of the openness of VANET environment. To address this problem, key insulation is introduced in our proposed scheme. With a helper device, vehicles could periodically update their own secret keys. In this way, the forward and backward secrecy has been achieved. In addition, the elliptic curve operations have been integrated to improve the performance. The random oracle model is adopted to prove the security of the proposed scheme, and the experiment has been conducted to demonstrate the comparison between our scheme and the existing similar schemes.