A Distributed Secured Localization Scheme for Wireless Sensor Networks

Enforcement of location-aware security policies requires trusted location information in localization of wireless sensor networks. In this paper, we propose to develop a distributed secured localization scheme that validates the reliability of location information associated with event reports. We make the network distributed by including a set of Anchor nodes across each route in the network. The anchor nodes are deployed such that they form connected sensor coverage. All the sensor nodes send their routing information to these anchor nodes, instead of sending it to the sink thereby avoiding the sink overload problem. Upon receiving the route request packets from the nodes, the anchor nodes check whether their route matches a historically expected behavior by packets from the same claimed location. Also we include authentication and encryption mechanisms to make the network more secured. Since this scheme involves distributed anchor nodes for verification, it has less overhead and delay. By simulation results, we show that our proposed scheme attains good delivery ratio with reduced delay and overhead.