WANI: Wormhole avoidance using neighbor information

Ad-hoc Networks due to their non-infrastructure nature exposure to several attacks. One of the most important attacks is Wormhole which is the subset of Dos. In Wormhole two or more attacker nodes cooperate with each other to make a misunderstanding topology for other nodes and appeal most of packets. Then the attackers can control all packets that have passed through them and compromise the security of packets by changing or dropping them. This attack can be more dangerous in networks which use on demand protocols such as DSR or AODV. In this paper, we introduce a new and efficient method to detect malicious nodes and prevent this type of attacks in ad-hoc networks which uses AODV. We use neighbors´ information to detect malicious nodes and prevent them. Almost all previous methods need extra hardware or moving vital information which can be more dangerous. Also most of them can only detect In-band attacks and don´t have any solution for Out-band attacks. Our method without any change to algorithms and any need to any hardware, can detect both In-band and Out-band attacks. Also it is very easy to implement. The simulation results show our method can achieve both high detection rate and accuracy.