A review and classification of various VANET Intrusion Detection Systems

The use of wireless links renders a vehicular ad-hoc network (VANET) vulnerable to malicious attacks such as Denial of Service, blackhole attack, Sybil attack, selective forwarding and altering routing information. In wired networks the attacker needs to gain access to the physical media to make an attack. In wireless networks the scenario is much different, there are no firewalls and gateways in place hence attacks can take place from any location within radio coverage area. Each mobile node in ad-hoc network is an autonomous unit in itself free to move independently. This means a node with not adequate physical protection is very much susceptible to be compromised. It is difficult to track down a single compromised node in a large network, attacks stemming from a compromised node are far more detrimental and much harder to detect.