A survey on privacy problems and solutions for VANET based on network model

Abstract

For a long term of vehicle communication research, now VANET is in a stage of implementation. However, most of VANET researches focus on message transmission. Vehicle is extremely personal device; therefore personal information, so called privacy has to be protected. In this paper, we analyze identity and location privacy threatening factors, problems, and solutions based on network model. To analyze solution's effectiveness, we define four attack models: External attack, Internal attack, Correlational attack, and Relational attack. According to our research, most of the solutions use pseudonym identity or address changing scheme to protect identity privacy. Also, solutions are weak to or do not consider the relational attack. We analyze this is due the meet the network model's transparency design goal and protect vehicle's real identity even revealing the vehicle's location. The result of this paper could guide a way to design a privacy preserve solution and present a trend of existing solutions. © 2011 Springer-Verlag.