Wireless sensor networks (WSNs) have gained researchers' attention in thelast several years. Small sensors powered by miniaturized microprocessors arecapable of supporting several applications for civil and military domains.Determining the location of sensors is a basic and essential knowledge for mostWSN algorithms and protocols including data tagging, routing, nodeidentification, among others. This paper surveys the different algorithms thathave been proposed to securely determine the location of a sensor node. By"secure", we mean that adversaries cannot easily affect the accuracy of thelocalized sensors. In other words, the localization algorithm must be robustunder several attacks. We provide a taxonomy for classifying different securelocalization schemes and describe possible attacks that can harm localization.In addition, we survey different secure localization schemes and show how theymap to the proposed taxonomy. We also give a comparison between the differentschemes, showing the attacks addressed by each.
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