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Soyoung Park, Baber Aslam, Damla Turgut and Cliff C. Zou Defense against Sybil attack in the initial deployment stage of vehicular ad hoc network based on roadside unit support Security and Communication Networks 6

Version of Record online: 3 JAN 2013 | DOI: 10.1002/sec.679

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We propose two certificate mechanisms for preventing the Sybil attack in vehicular ad hoc network: the timestamp series approach and the temporary certificate approach. In the first approach, vehicles obtain a series of timestamps signed by the RSUs on their driving way. The Sybil attack can be detected by checking the similarity of timestamp series. The second approach issues temporary certificates to vehicles, which are valid only in a particular area for a limited time. By guaranteeing the uniqueness of the certificate, we prevent the Sybil attack.

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