Wireless sensor networks are an important for monitoring distributed remote environments. As one of the key technologies involved in WSNs, nodes fault detection is indispensable in most WSN applications. It is well known that the distributed fault detection scheme checks out the failed nodes by exchanging data and mutually testing among neighbor nodes in this network, but the fault detection accuracy of a scheme would decrease rapidly when the number of neighbor nodes to be diagnosed is small and the node’s failure ratio is high. Cost Aware Secure Routing protocol to address these two conflicting issues through two adjustable parameters: energy balance control and probabilistic based random walking. CASER has an excellent routing performance in terms of energy balance and routing path distribution for routing path security. The main objective to have a network which gives assurance of packet delivery and give the node time to regain its so that it will be able to carry further load Packets on the network. This can be done by using shortest path. Prior work relies on maintaining multi hop neighbor lists and predetermines some criteria for the node’s involvement in the recovery. Multi hop based schemes often impose high node repositioning overhead and the repaired inter actor topology using two hop schemes may differ significantly from its pre-failure status.

Keywords : Cost Aware Secure Routing, Electronic Book Code, multi hop, Security, topology, Wireless Sensor Network.