Abstract
Location information of sensor nodes in wireless sensor networks (WSNs) is very important, for it makes information that is collected and reported by the sensor nodes spatially meaningful for applications. Since most current sensor localization schemes rely on location information that is provided by beacon nodes for the regular sensor nodes to locate themselves, the accuracy of localization depends on the accuracy of location information from the beacon nodes. Therefore, the security and reliability of the beacon nodes become critical in the localization of regular sensor nodes. In this paper, we propose a reputation-based security scheme for sensor localization to improve the security and the accuracy of sensor localization in hostile or untrusted environments. In our proposed scheme, the reputation of each beacon node is evaluated based on a reputation evaluation model so that regular sensor nodes can get credible location information from highly reputable beacon nodes to accomplish localization. We also perform a set of simulation experiments to demonstrate the effectiveness of the proposed reputation-based security scheme. And our simulation results show that the proposed security scheme can enhance the security and, hence, improve the accuracy of sensor localization in hostile or untrusted environments.
Highlights
The technologies of wireless sensor networks (WSNs) are becoming popular along with the rapid advancement of wireless communication technology, more remarkable performance of integrated circuits as well as decrease in cost and increase in functionality of sensor nodes
We proposed a novel reputation model for regular sensor nodes to evaluate the credibility of beacon nodes in sensor localization
Beacon nodes first evaluate each other and provide the evaluation results to regular sensor nodes for them to determine the credibility of beacon nodes to ensure that they will receive and use credible position information from the beacon nodes in locating their own positions
Summary
The technologies of wireless sensor networks (WSNs) are becoming popular along with the rapid advancement of wireless communication technology, more remarkable performance of integrated circuits as well as decrease in cost and increase in functionality of sensor nodes. Some of the methods implement verification measures to reduce the impact of using unreliable or false location information [15] while some others apply a series of schemes in which temporal, spatial, and consistent properties are considered to deal with distance-consistent spoofing attacks [16] In these schemes, sensor nodes are divided into just two types: secure and insecure sensor nodes through the mechanisms of comparing the nodes and their behavior against normal situations. We propose a novel reputation-based secure sensor localization scheme to improve the accuracy of sensor localization for WSNs in hostile environments. Our simulation results show that the proposed reputation-based secure sensor localization scheme can improve the accuracy of sensor localization in hostile or untrusted environments.
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