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Intrusion detection is one of challenging issues in wireless networks. The inherently vulnerable characteristics of wireless mobile ad hoc networks make them susceptible to attacks in-spite of some security measures, and it may be too late before any counter action can take effect. As such, there is a need to complement security mechanisms with efficient intrusion detection and response systems. This paper proposes an agent-based model to address the aspect of intrusion detection in cluster based Mobile ad hoc network environment. The model comprises of mobile agents, which are used to detect intrusions, respond to intrusions, mainly preventing the routing attacks while securing them and distributing selected and aggregated intrusion information to all other nodes in the network in an intelligent manner to compensate the attack. The model is simulated to test its operation effectiveness by considering various performance parameters such as, packet delivery ratio, communication overhead, throughput. It implements a secure detection and prevention technique that contains the Blowfish algorithm which is a symmetric encryption and decryption algorithm having a secure standard till date against attacks to make the network transmission secure while monitoring malicious nodes and preventing them from compromising the integrity of the network. Agent based approach facilitates flexible and adaptable security services. Also, it supports component based software engineering components such as maintainability, reachability, reusability, adaptability, and flexibility.

Mobile Ad-hoc Network is a non-secure wireless network which has no infrastructure, dynamical topology in which the nodes can move anywhere, may join or leave the network through multi-hop communication. In cluster network, all the nodes can select one Cluster Head for transmission of data to another Cluster Head through gateways which is mainly used for saving energy of each node. Intelligent agents are used for collecting secure data from neighboring nodes and inform to the trusted agent in clustered networks. Security plays major role in wireless medium. Detecting malicious node is also causing a major concern to damage the data packets. To avoid this problem of entering malicious node in networks and non-secured data, agents based trusted revocation in clustering mobile ad-hoc network for improving security with Certificate Authority to improve the network performance like high throughput, less latency time and improved certificate revocation time using ns2 simulators.

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