Date Added: May 2011
Position verification in Wireless Sensor Networks (WSNs) is quite tricky in presence of attackers (malicious sensor nodes), who try to break the verification protocol by reporting their incorrect positions (locations) during the verification stage. In the literature of WSNs, most of the existing methods of position verification have used trusted verifiers, which are in fact vulnerable to attacks by malicious nodes. They also depend on some distance estimation techniques, which are not accurate in noisy channels (mediums). In this paper, the authors propose a secure position verification scheme for WSNs in noisy channels without relying on any trusted entities. Their verification scheme detects and filters out all malicious nodes from the network with a very high probability.