Performance of Swarm Based Intrusion Detection System Under Different Mobility Conditions in MANET

In mobile ad hoc network (MANET), the process of intrusion detection is difficult due to the features of the MANET such as dynamic topology, limited transmission range, mobility, etc. The movement of nodes plays the major role. In this paper, three (Swarm based Intrusion detection)SBDTs are created namely SBDTLOW-MOBILITY, SBDT-MEDIUM-mobility and SBDTHIGH-MOBILITY. In all the three SBDTs, the nodes with highest trust value, residual bandwidth and residual energy are selected as active nodes using the swarm agents. Every active node examines its neighbor nodes within its radio transmission range and gathers the trust value from all monitored nodes. The active nodes will always be changing as per the trust thresholds. Upon collaborative exchange of the trust values of the monitored nodes among the active nodes, if the active node finds any node below a minimum trust threshold, then the node is marked as malicious. When the source receives alert message about the malicious node, a defense technique is deployed to filter the corresponding malicious node from the network. By simulation results we show that the SBDT-HIGH-MOBILITY is producing better results while varying the nodes and SBDT-LOWMOBILITY is producing better results while varying the attackers. From this it is found that the mobility condition also plays a major role during the swarm based intrusion detection.