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International Journal of Distributed Sensor Networks
Volume 2013 (2013), Article ID 615906, 9 pages
http://dx.doi.org/10.1155/2013/615906
Research Article

A Distributed Pseudonym Management Scheme in VANETs

1School of Computer and Information, Hefei University of Technology, Hefei 230009, China
2The Anhui Provincial Key Laboratory of Mine IoT and Mine Safety Supervisory Control, Hefei 230088, China

Received 22 December 2012; Accepted 3 April 2013

Academic Editor: Xu Yongjun

Copyright © 2013 Xiaoling Zhu 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.

Abstract

Security and privacy have been important issues in VANETs. Anonymity is an effective way to achieve privacy protection, and it sometimes requires to be disclosed for determining traffic liability. In most pseudonym schemes, an authority is aware of a vehicle's secret, and its compromise will result in the leakage of a large amount of privacy information. So, we propose a distributed traceable pseudonym management scheme in VANETs. In the scheme, a blind signature method is adopted to achieve strict separation of issuance and tracking. The distributed tracking protocol is proposed to enhance the robustness for tracking, which is based on the improved scheme for shared generation of RSA keys. An efficient pseudonymous authentication mechanism is proposed to reduce the communication overhead. Compared with other related proposals, our scheme is unforgeability, especially against authority forge attacks, and has better robustness. Moreover, the performance analysis shows that it is efficient in VANETs.