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International Journal of Distributed Sensor Networks
Volume 2012 (2012), Article ID 763187, 12 pages
http://dx.doi.org/10.1155/2012/763187
Research Article

Secure Neighbor Discovery in Wireless Sensor Networks Using Range-Free Localization Techniques

Departmento de Señales, Sistemas y Radiocomunicaciones, ETSI de Telecomunicación, Universidad Politécnica de Madrid, Avenida Complutense 30, 28040 Madrid, Spain

Received 14 July 2012; Revised 27 September 2012; Accepted 27 September 2012

Academic Editor: An Liu

Copyright © 2012 Mariano García-Otero and Adrián Población-Hernández. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

If a wireless sensor network (WSN) is deployed in a hostile environment, the intrinsic limitations of the nodes lead to many security issues. In this paper, we address a particular attack to the location and neighbor discovery protocols, carried out by two colluding nodes that set a wormhole to try to deceive an isolated remote WSN node into believing that it is a neighbor of a set of local nodes. To counteract such threat, we present a framework generically called detection of wormhole attacks using range-free methods (DWARF) under which we derive two specific wormhole detection schemes: the first approach, DWARFLoc, performs jointly the detection and localization procedures employing range-free techniques, while the other, DWARFTest, uses a range-free method to check the validity of the estimated position of a node once the location discovery protocol is finished. Simulations show that both strategies are effective in detecting wormhole attacks, and their performances are compared with that of a conventional likelihood ratio test (LRT).