Abstract
Extensive work has been done on the protection of wireless sensor networks (WSNs) from the hardware to the application layer. However, only recently, the privacy preservation problem has drawn the attention of the research community because of its challenging nature. This problem is exacerbated in the domain of WSNs owing to the extreme resource limitation of sensor nodes. In this study the authors focus on the location privacy problem in WSNs, which allows an adversary to determine the location of nodes of interest to him. The authors provide a taxonomy of solutions based on the power of the adversary and the main techniques proposed by the various solutions. In addition, the authors describe and analyse the advantages and disadvantages of different approaches. Finally, they discuss some open challenges and future directions of research.
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