Attack-Resistant Sensor Localization under Realistic

Attack-Resistant Sensor Localization under Realistic - This...

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Attack-Resistant Sensor Localization under Realistic Wireless Signal Fading Anindya Iqbal and Manzur Murshed Gippsland School of Information Technology Monash University Churchill Vic 3842, Australia {Anindya.Iqbal, Manzur.Murshed} Abstract —In a decentralized sensor network, localization process relies on the integrity of participating sensors. Existence of malicious beacon nodes in the vicinity of non-beacon nodes affects this process. This paper presents a trilateration-based secure localization technique, which is capable of estimating the location of a sensor with high accuracy so long four neighbouring beacon nodes are benign, irrespective of the number of neighbouring liars and without assuming any trust model. In realistic scenarios of wireless environment where transmitted signals attenuate randomly due to fading, the liar-tolerance level of this attack-resistant technique has to be relaxed accordingly. Superiority of this technique against the state-of-the-art has been established with extensive simulation results in terms of location estimation accuracy and liar-filtering probability. Keywords-secure localization; trilateration; wireless sensor network; signal fading; attack-resistant I. INTRODUCTION Wireless sensor networks (WSNs), consisting numerous sensor nodes with limited communication range, energy and computational resources, have been widely used in external and domestic monitoring e.g., military surveillance. These networks face unique challenges as sensors may be deployed in unattended hostile environment. While researchers extensively focused on communication protocols, energy efficiency, and fault-tolerant ad-hoc topology construction, application layer services such as localization, synchronization, and in-network data aggregation have recently gained attraction. Sensor nodes are usually deployed randomly throughout a wide area where they transmit their sensed data to some sink nodes or a base station. To facilitate this service efficiently, routing protocols need the physical location of the sensor nodes. Apart from routing data, the location information is also important to sink nodes to identify the source of data while processing received information or for future query. Positions of most of the sensor nodes are not known apriori . Usually some of the nodes, termed as the anchors or beacon nodes in the literature, are either equipped with GPS receivers to estimate their positions with high precision or manually configured with their positions for small static networks. It is not feasible to equip all nodes with GPS for additional hardware cost and energy requirement. The beacon nodes periodically transmit their position information so that other nodes in their vicinity may estimate their position from the received signals. Position of a non-beacon node can be estimated by triangulation using the angles of the received signals or trilateration using the estimated distances from the
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This note was uploaded on 10/01/2010 for the course ELEC 6111 taught by Professor Brown during the Spring '10 term at E. Illinois.

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Attack-Resistant Sensor Localization under Realistic - This...

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