A Survey on Privacy-preserving Schemes for Vehicular Ad Hoc Networks

Vehicle Ad Hoc Networks (VANETs) leverage wireless communication technology to enable vehicles to continuously exchange entertainment information, traffic conditions, weather information, etc., so as to enhance traffic safety management and provide drivers with a safe and comfortable driving environment. However, due to the open access and wireless communication characteristics of VANETs, malicious node attacks may cause privacy leakage. Therefore, privacy protection is crucial to the research of VANETs. We introduced the privacy threats in VANETs from the perspective of privacy attacks in this paper. Then, we overview the existing privacy-preserving schemes in VANETs, and divided the schemes into three categories, including location privacy-preserving schemes, identity privacy-preserving schemes and data privacy¬preserving schemes according to the different types of attacks they resist. Finally, we point out some challenge for the design of Privacy-preserving Schemes forVANETs.