International Journal of Advanced Research in Computer and Communication Engineering (IJARCCE)
Ad-hoc network is a group of wireless mobile computers for temporary communication. Here, autonomous and self-interested nodes in the network and the broadcast nature of radio transmission make the network highly vulnerable to serious security attacks. In a multi-hop wireless ad-hoc network, packet losses are attributed to harsh channel conditions and intentional packet discard by malicious nodes. Packet losses may due to link errors or the combined effect of link errors and malicious drop. It becomes more difficult to detect internal attacks, whereby a malicious node that is part of the route exploits communication information to selectively drop a small number of packets which may critically affect network performance.