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Intelligent Transportation Systems (ITSs),
BibTeX
@MISC{Chang_intelligenttransportation,
author = {Shan Chang and Yong Qi and Hongzi Zhu and Jizhong Zhao and Xuemin (sherman Shen},
title = {Intelligent Transportation Systems (ITSs),},
year = {}
}
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Abstract
Abstract — In urban vehicular networks, where privacy, especially the location privacy of anonymous vehicles is highly concerned, anonymous verification of vehicles is indispensable. Consequently, an attacker who succeeds in forging multiple hostile identifies can easily launch a Sybil attack, gaining a disproportionately large influence. In this paper, we propose a novel Sybil attack detection mechanism, Footprint, using the trajectories of vehicles for identification while still preserving their location privacy. More specifically, when a vehicle approaches a road-side unit (RSU), it actively demands an authorized message from the RSU as the proof of the appearance time at this RSU. We design a location-hidden authorized message generation scheme for two objectives: first, RSU signatures on messages are signer-ambiguous so that the RSU location information is concealed from the resulted authorized message; second, two authorized messages signed by the same RSU within the same given period of time (temporarily linkable) are recognizable so that they can be used for identification. With the temporal limitation on the linkability of two authorized messages, authorized messages used for long-term identification are prohibited. With this scheme, vehicles can generate a location-hidden trajectory for location-privacy-preserved identification by collecting a consecutive series of authorized messages. Utilizing social relationship among trajectories according to the similarity definition of two trajectories, Footprint can recognize and therefore dismiss “communities ” of Sybil trajectories. Rigorous security analysis and extensive trace-driven simulations demonstrate the efficacy of Footprint. Index Terms — Sybil attack, location privacy, signer-ambiguous signature, urban vehicular networks, location-hidden trajectory.
Keyphrases
authorized message intelligent transportation system location privacy location-hidden trajectory urban vehicular network dismiss community signer-ambiguous signature appearance time location-hidden authorized message generation scheme temporal limitation long-term identification road-side unit similarity definition anonymous verification rigorous security analysis multiple hostile identifies index term sybil attack sybil trajectory consecutive series sybil attack extensive trace-driven simulation novel sybil attack detection mechanism location-privacy-preserved identification rsu location information large influence social relationship anonymous vehicle
