SECURED REACTIVE ROUTING PROTOCOL FOR MOBILE NODES IN SENSOR NETWORKS

摘要

Wireless sensor networks have drawn a lot of attention recently due to their broad applications in both military and civilian operations. Sensor nodes in the network are characterized by severely constrained energy resources and communicational capabilities. Since, these nodes are frequently established in a physically insecure environment, they are vulnerable to different types of active attacks. These attacks can inject malicious packets by compromising the node. Routing protocols are common target of these compromised nodes. Secured reactive routing protocols have recently been developed by using cryptographic algorithms against these attacks. However these routing protocols entail a number of prerequisites during both network establishment and operation phases. In contrast, trust based routing protocols locate trusted routes rather secure routes in the network. In this paper, a secure routing protocol named secured dynamic source routing protocol (S-DSR) is implemented for mobile sensor networks by incorporating trust based mechanism in the existing dynamic source routing protocol (DSR). Simulation results prove that S-DSR outperforms the DSR by reducing the routing overhead and improving the delivery ratio of the network.