Trust framework for attack resilience in MANET using AODV

Mobile Ad-hoc network (MANET) is a collection of arbitrary moving autonomous nodes having routing capabilities. Theoretically, nodes are expected to cooperate with each other to facilitate communication with not directly connected nodes but in real scenario some of the nodes may be malicious. These compromised /malicious nodes may be part of the network or any other node trying to intrude in the network. A trust based framework is proposed in this paper to make the network resilient to malicious nodes. Trust is calculated using route request and route reply counter to make it simple and scalable. Ad Hoc OnDemand Distance Vector (AODV) routing protocol is used as the basic protocol. Performance analysis is done by varying malicious node density and calculating packet loss & average packet delay. It shows that the proposed framework along with trust calculating mechanism is giving better results as compared to basic routing protocol AODV in the presence of malicious nodes.