Secure localization with defense against selective forwarding attacks in wireless sensor networks

In selective forwarding attack, malicious nodes may refuse to forward certain messages and simply drop them, ensuring that they are not propagated any more. Similarly, in sensor localization, a malicious node may refuse to forward the location information or drops them, with confirmation that they are not propagated further. In this paper, we propose a defensive technique for selective forwarding attack in localization. It consists of 3 phases for secure information delivery. First phase is secret sharing of information, secondly randomized propagation of each information share, and finally minhop routing towards the anchor nodes. Each time an information packet needs to be sent, the packet is broke into t shares according to threshold secret sharing algorithm. When the anchor nodes collect at least t shares, original packet are reconstructed. Through simulation results, it is shown that this is effective defensive technique for selective forwarding attack.