Defending Wormhole Attack in Wireless Ad-hoc Network
The ad-hoc networks are the temporarily established wireless networks which does not require fixed infrastructure it is also called as infrastructure less network. Because of some flaws of ad hoc network such as shared wireless medium and lack of any central coordination makes them more prone to attacks in comparison with the wired network. Among all the attacks wormhole attack is the most severe attack. In this attack an attacker capture the packets at one location in the network and send it to another attacker at a distant location through tunnels which is established through different ways like packet encapsulation, using high power transmission or by using direct antennas. This tunnel between two colluding attackers is virtual and it is called as a wormhole.