SECURED GREEDY PERIMETER STATELESS ROUTING FOR WIRELESS SENSOR NETWORKS

Wireless sensor networks are collections of large number of sensor nodes. The sensor nodes are featuredwith limited energy, computation and transmission power. Each node in the network coordinates withevery other node in forwarding their packets to reach the destination. Since these nodes operate in aphysically insecure environment; they are vulnerable to different types of attacks such as selectiveforwarding and sinkhole. These attacks can inject malicious packets by compromising the node. Geographical routing protocols of wireless sensor networks have been developed without considering thesecurity aspects against these attacks. In this paper, a secure routing protocol named secured greedyperimeter stateless routing protocol (S-GPSR) is proposed for mobile sensor networks by incorporatingtrust based mechanism in the existing greedy perimeter stateless routing protocol (GPSR). Simulationresults prove that S-GPSR outperforms the GPSR by reducing the overhead and improving the deliveryratio of the networks