Document Type



Recently, great progress has been made in the study of Vehicular Ad Hoc Networks (VANETs) to solve road congestion and prevent traffic accidents. To pursue the life quality, driving comfort and entertainment requirements are necessary, such as surfing the Internet, searching nearby gas stations, restaurants, etc. Hence, vehicles have to access to the Internet via Wi-Fi hotspots provided by roadside units (RSUs). Obviously, the connection to RSUs reveals the driving routine. The location privacy of vehicles is seriously threatened. In this paper, we propose a novel approach to protect the location privacy while accessing to Wi-Fi hotpots (RSUs). We adopt the idea of ‘off-the-record’ communication to achieve the privacy property. In other words, the vehicle performs a deniable authentication with RSU while accessing to Wi-Fi hotpot and the participants should have the deniability capability. RSU provides the Internet service to the vehicle if authentication completes. On the other hand, this authentication conversation leaves no ‘paper trail’ and therefore, the vehicle can deny to a third party that the fact of the authentication occurred since the communication transcript could be produced (simulated) by others.