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Mobile Information Systems
Volume 2017 (2017), Article ID 4682538, 11 pages
Research Article

Obfuscated RSUs Vector Based Signature Scheme for Detecting Conspiracy Sybil Attack in VANETs

Xia Feng1,2 and Jin Tang2

1Department of Computer Science & Technology, Anhui University, Hefei, Anhui 230601, China
2School of Computing, The University of Utah, Salt Lake City, UT 84102, USA

Correspondence should be addressed to Xia Feng

Received 11 August 2016; Revised 11 December 2016; Accepted 22 December 2016; Published 7 February 2017

Academic Editor: Stefania Sardellitti

Copyright © 2017 Xia Feng and Jin Tang. 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.


Given the popularity of vehicular Ad hoc networks (VANETs) in traffic management, a new challenging issue comes into traffic safety, that is, security of the networks, especially when the adversary breaks defence. Sybil attack, for example, is a potential security threat through forging several identities to carry out attacks in VANETs. At this point, the paper proposed a solution named DMON that is a Sybil attack detection method with obfuscated neighbor relationship of Road Side Units (RSUs). DMON presents a ring signature based identification scheme and replaces vehicles’ identities with their trajectory for the purpose of anonymity. Furthermore, the neighbor relationship of RSUs is obfuscated to achieve privacy preserving of locations. The proposed scheme has been formally proved in the views of security and performance. Simulation has also been implemented to validate the scheme, in which the findings reveal the lower computational overhead and higher detection rate comparing with other related solutions.