Research On The Privacy Protection Method Of Vehicle Location Based On Dynamic Pseudonym Exchange Area In The Internet Of Vehicles

Io V(Internet-of-Vehicles)is a large system network based on the in-vehicle network,the inter-vehicle network and the vehicle-mounted mobile Internet.The network performs wireless communication and information exchange between vehicles,vehicles,roads,pedestrians,and the Internet in accordance with agreed communication protocols and data interaction standards.Io V is not only an integrated network capable of intelligent traffic management,intelligent dynamic information services and intelligent vehicle control,but also a typical application of the Internet of Things technology in the field of transportation systems.Location privacy has always been an important research part in the security of the Internet of Vehicles.Attackers can judge the user’s sensitive information based on the location of the vehicle.In order to ensure the privacy and security of vehicle locations,existing research schemes include: mixed zone,silent period,pseudonym exchange,and so on.This paper analyzes the characteristics and deficiencies of existing location privacy solutions,the security challenges and security requirements of Io V,and introduces the key technologies of Internet-of-Vehicles security.In view of the risks of group managers,excessive vehicle communication overhead,and vehicle accountability in the existing solutions,we propose a new scheme based on Dynamic Pseudonym Swap Zone,called DPSZ,to protect location privacy of vehicles.For each vehicle,DPSZ allows it dynamically to establish a temporary pseudonym swap zone on demand to exchange the pseudonym with another random vehicle in the just formed zone.This randomness of choosing the pseudonym exchanging vehicles prevents DPSZ from the secure risk that the information of exchanging participants exposes to their group manager in some existing works in which each pair of pseudonym exchanging participants is assigned by the manager.To avoid the high communication and computation overhead of frequently swapping pseudonyms,DPSZ adopts a combination of swap and update to achieve the unlinkability between new and previous pseudonyms.In order to ensure the security of the exchanged information,our solution uses the Diffie-Hellman encryption principle in the process of establishing the pseudonym exchange area to generate a dynamic session key to encrypt the exchanged information.Moreover,DPSZ can self-adapt to the varying surroundings to reduce the communication cost of forming pseudonym swap zones in high vehicle density areas.In order to reflect the performance of DPSZ,we verified it through simulation experiments.The analysis and simulation results show that our proposed DPSZ is a high location privacy preserving,secure,auditable scheme.