Efficient Self-organized Trust Management in Location Privacy Enhanced VANETs

Improving the safety of transportation system is the main purpose of vehicle ad-hoc networks (VANETs). In order to improve traffic safety and ensure the event messages reliability, more and more researches have been focused on trust management to resolve the problems. However, in these researches, little attention has been paid to the location privacy due to the natural conflict between trust and anonymity, which is the basic protection of privacy. Although traffic safety remains the most crucial requirement in VANETs, location privacy can be just as important for drivers, and neither can be ignored. In this paper, we propose a self-organized trust management system that aims to thwart internal attackers from sending false messages in privacy-enhanced VANETS. To evaluate the reliability and performance of the proposed system, we conducted a set of simulations under collusion and non-collusion attacks. The simulation results show that the proposed system is highly resilient to adversarial attacks, no matter whether it is under a fixed silent period (FSP) or random silent period (RSP) location privacy-enhanced scheme.

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