PPAS: privacy protection authentication scheme for VANET
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PPAS: privacy protection authentication scheme for VANET Hui Zhu · Tingting Liu · Guanghui Wei · Hui Li
Received: 14 December 2012 / Accepted: 28 March 2013 © Springer Science+Business Media New York 2013
Abstract Vehicular ad hoc network (VANET) can increase the traffic efficiency by allowing arbitrary vehicles to broadcast the messages to other vehicles and road side units (RSUs). But due to the openness of the wireless network, VANET is very vulnerable to forgery attack. Thus, the security and privacy of the messages should be provided, to make sure that the real identity of vehicles can be traceable by authorized party while not be revealed to other vehicles. The existing solutions can neither satisfy the privacy requirement nor have an effective message verification scheme on vehicles. A secure and privacy protect authentication scheme is proposed in this paper, which comprises local authentication and roaming authentication for VANET based on bilinear pairing and can provide secure communications and anonymous authentication among RSUs and vehicles. Keywords Vehicular ad hoc network · Authentication · Anonymity · Roaming · Privacy protection
1 Introduction The statistics of current traffic accidents are notoriously horrific. This is partially because that vehicles are independently controlled, and that there is no mechanism to gather and process traffic information and provide warnings. In order to improve the traffic condition, researchers from all H. Zhu () · T. Liu · G. Wei · H. Li State Key Laboratory of Integrated Service Networks, Xidian University, Xi’an, China e-mail: [email protected] H. Zhu Network and Data Security Key Laboratory of Sichuan Province, Chengdu, China
around the world are discovering effective solutions. Vehicular Ad-hoc Network (VANET) seems to be a promising method and has attracted great attention. Emerging with the rapid development of computer science, wireless networks and GPS (Global Positioning System) technologies, VANET can provide traffic participants with accurate, real-time traffic information services, by collecting, analyzing, processing and disseminating traffic information. VANET can greatly enhance the degree of traffic information sharing, and effectively alleviate the increasing deterioration of road traffic congestion, traffic accidents and environmental pollution problems. Meanwhile, VANET can provide the community with an open public service platform to meet the diverse needs of users. However, VANET also faces many challenges of data security and user privacy while it provides different types of services (including collection of information data in VANET, personal navigation services and information services). These problems may result in the disclosure of the geographical and specific business information associated with the real-world identity of users without the users’ awareness, for example, users’ locations, hobbies and other personal privacy information. VANET has many features: large number of users, high-speed movement, frequent roaming, and high
