Intrusion Detection and Response System in AODV for Mobile Adhoc Network

Mobile Adhoc network is dynamic topology network in which all nodes can cooperate with each other for data transmission. But some nodes are not cooperative they drops some data packet which is called gray hole attacks. In the past, various techniques are used for detecting these attacks. In the proposed approach we use a gray hole intrusion detection system (G-IDS) for detecting gray hole attack. The G-IDS node monitors the traffic in network and it checks the activity of each node in the network. When it detects that at any node the difference of packet forward and packet receive is greater than threshold value then it sends the alert notification to all nodes about this malicious node. Then all nodes block this malicious node from the network. The proposed approach is compared with the existing approach on the performance parameters. The result in packet delivery ratio, packet loss rate and average throughput prove that this technique is better than other existing techniques.