A Local Intrusion Detection Routing Security over

Mobile Adhoc Network (MANET) is a group of wireless nodes that are distributed without relying on any standing network infrastructure. MANET routing protocols were designed to accommodate the properties of a self- organized environment without protection against any inside or outside network attacks. In this paper, we propose a Local Intrusion Detection (LID) security routing mechanism to detect Black Hole Attack (BHA) over Ad hoc On Demand Distance Vector (AODV) MANET routing protocol. In LID security routing mechanism, the intrusion detection is performed locally using the previous node of the attacker node instead of performing the intrusion detection via the source node as in Source Intrusion Detection (SID) security routing mechanism. By performing LID security routing mechanism, the security mechanism overhead would be decreased. Simulation results using the GloMoSim simulator show that the improvement ratio of the throughput gained by LID security routing mechanism and overall improvement reduction in the end-to-end delay and routing overhead.