RIN: A dynamic pseudonym change system for privacy in VANET

We propose in this paper a security protocol based on a dynamic change of pseudonym for privacy and anonymity in Vehicular Ad hoc NETworks (VANET). Our proposal ensures privacy for the driver and his vehicle whether he is the transmitter or receiver of the message. By handling all possible cases of changes in vehicles behavior during traffic, we ensure a safe and secure traffic management. We built the architecture of our solution on three essential entities designed for VANET: a trusted authority, a Road Side Unit, and vehicles. Our pseudonym change system ensures anonymity at any time, anywhere, with any speed of a vehicle, in all directions of a vehicle, in any environment (highway or urban), with any traffic density, independently of neighboring vehicles, and changes in vehicles behavior. In three steps, anonymity, integrity, and confidentiality are guaranteed by our RIN (Real Initial New) protocol. Our protocol blocks attacks as DOS and Sybil. Results obtained by the simulations show the efficiency of our solution. Compared with other relevant approaches from the literature, the results confirm the credibility of our protocol regarding to the privacy assurance in VANET.