A trust based secure routing scheme for MANETS

A MANET is a kind of wireless mobile network that can be easily established with the help of few infrastructure less connections. In such networks, every node is independent of its own and hence can act as a router and performs the job of routing as well. All the nodes in a MANET are dynamic in nature, in that the nodes can change their location from time to time due to their mobility feature, and any node is free to join and leave the network as and when needed and hence we can say that the topology changes dynamically. In recent days, security in MANET's has been the prime focus within the research community. There are many different attacks aimed at MANET's but solutions to these have been not paid much attention in literature. There are several methods that can deal with security issues in wired networks but the same cannot be used for wireless networks. There are many routing protocols proposed for MANET's but most of them exhibit poor performance in the presence of malicious nodes. This paper focuses on a new hybrid secure routing protocol S-DSR that establishes a secure communication path across the nodes in the network which can improve the packet delivery ratio and throughput etc. This protocol helps in finding the best path for secure file transmission based on the trust information from the neighbouring nodes. The proposed protocol has been implemented on NS-2. This protocol achieves better packet delivery ratio and reduced delay when compared with protocols like AODV, AOMDV etc.