A New Approach to Trust Evaluation for Cluster Based Manets

A Mobile Ad hoc NETwork (MANET) is a pool of independent, dynamic, wireless devices that forms a network, devoid of no permanent infrastructure. This inherent features and wireless nature of mobile ad hoc networks makes them vulnerable to a wide variety of attacks. To discover routes with trusted nodes, we propose an approach for constructing a route without malicious nodes. To forward packets through trusted nodes, this protocol evaluates various trust parameters of neighboring nodes. To prevent a node from same attack, a weight is calculated and assigned dynamically. Simulations are done using NS2 simulator. Our proposed approach has been analyzed and evaluated for performance metrics such as packet delivery ratio, control overhead, packet drop ratio, jitter and end to end delay. Dynamic weight assignment of individual trust parameters reduces end to end delay and control overhead resulting in less packet drop ratio and high packet delivery ratio. We compare our work with other clustering algorithms, which are CBTRP and 2ACK. Our analysis and simulation result clarifies that, the proposed work effectually identifies and isolates malicious nodes and it outperforms the other algorithms.