Toward Secure Vehicular Ad-hoc Networks: A Survey

Vehicular Ad-hoc Networks (VANETs) are wireless communication systems that provide safer and more efficient road services. Their interesting applications attract many researchers from both academia and industry. However, their security requirements represent challenges that should be addressed before VANETs can be deployed. Although there are several surveys covering VANETs, they either do not concentrate on security issues or do not cover recent work. In this paper, we provide a complete survey on recent security-related issues in VANETs. We present VANETs security problems and the current techniques for solving them. We discuss to what extent each technique achieves security requirements such as authentication, integrity, privacy, and revocation of misbehaving vehicles. Finally, we present security problems in VANETs that are still open for future research.