A swarm-based efficient distributed intrusion detection system for mobile ad hoc networks (MANET)

In mobile ad hoc network (MANET), the issues such as limited bandwidth availability, dynamic connectivity and so on cause the process of intrusion detection to be more complex. The nodes that monitor the malicious nodes should have necessary residual bandwidth and energy and should be trustable. In order to overcome these drawbacks, in this paper, we propose a swarm-based efficient distributed intrusion detection system for MANET. In this technique, swarm agents are utilised to select the nodes with highest trust value, residual bandwidth and residual energy as active nodes. Each active node monitors its neighbour nodes within its transmission range and collects the trust value from all monitored nodes. The active nodes adaptively change 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 defence technique is deployed to filter the corresponding malicious node from the network. By simulation results, we show that the proposed approach is efficient intrusion detection mechanism for MANET.