A Survey on Privacy Preservation Methods in Future Vehicular Networks

As increasing vehicular technology is becoming more popular due to global climate change and the promotion of renewable energy sources, electric vehicles (EVs) with an array of improved features are becoming increasingly prevalent in the realm of automobile technology. As EVs require frequent charging sessions, it is integral to consider the potential privacy and security risks associated with the extensive data collected when charging or discharging from smart grids, smart buildings, or other EVs. This sensitive data includes users’ locations, driver’s licenses, and more. Therefore, preserving their privacy is a major concern. This paper investigates the existing privacy-preserving solutions developed in the literature to address these issues, including blockchain technology which is essential in protecting user data and thwarting privacy attacks around the charging station-to-vehicle (CS2V) and vehicle-to-vehicle (V2V). Additionally, privacy-preserving context-based online dispatching systems (PCOEDS) are presented as an effective strategy to authenticate users’ information and protect their privacy in the context of vehicle-to-building (V2B) charging/discharging. Finally, a thorough comparison of the existing works is presented along with future research directions that will serve to further enhance the security levels of future EV transportation systems.