FLIP: An Efficient Privacy-Preserving Protocol for Finding Like-Minded Vehicles on the Road

Vehicle chatting is one of the most promising applications in VANETs, which allows like-minded vehicles to chat on the topics of common interest on the road. However, there exist some newly emerging privacy challenging issues in vehicle chatting application, such as how to find a like-minded vehicle on the road and how to prevent one´s interest privacy (IP) from others who are not like-minded? In this paper, to tackle these challenging issues, we propose an efficient privacy-preserving finding like-minded vehicle protocol (FLIP), and apply the provable security technique to demonstrate its security. In addition, extensive simulations are also conducted to examine its practical considerations, i.e., the relation between the expected IP-preserving level and the delay of finding like-minded vehicles on the road.