Location privacy protection scheme based on random encryption period in VANETs

Abstract

How to ensure location privacy has become an important issue for VANETs’ security. The more effective mechanism is that the vehicles can not be associated by replacing the pseudonyms to protect their location privacy. This paper proposes a novel location privacy protection scheme for VANETs. When vehicles need to change the pseudonyms, they will cooperate with the neighbor nodes to create the encrypted area through group key encryption, so that the external adversary cannot crack the message in this area. During this period, some vehicles change the pseudonyms jointly so that the external adversary can not associate the pseudonyms before and after. Thus the location privacy protection of the vehicle nodes is achieved.