Wiretap resisting and privacy preserving data exchange with physical layer security and blockchain based authentication in Internet of Vehicles

With the development of automobile industry technology, vehicles have greatly affected everyday life, work and other aspects. With the continuous innovation of sensor technology, computer technology, wireless communication technology, and GPS technology, the concept of Inter of Vehicles (IoV) has been widely regarded as the core technology to solve a series of problems. However, as a complexity network with multiple elements including people, vehicle, base-station and so on, IoV is confronted with security threatened. In this paper, secure data exchange has been considered for two authenticated On Board Units (OBUs) with help of Road Side Unit (RSU). Blockchain based authentication and physical layer security have been applied into IoV for wiretap resisting and privacy preserving data exchange. For wiretap resisting, two synchronized transmitted signals from OBUs act as artificial noise at eavesdropper. In addition, for privacy preserving, summed codeword is formed at RSU which cannot be recovered individually. Finally, simulation results have been conducted to demonstrate that the proposed protocol can achieve transmission efficiency as well as informatics security.