Efficient Privacy Preserving Single Anchor Localization Using Noise-Adding Mechanism for Internet of Things.

The technological advantages of 5G networks facilitate the development of location technology for the Internet of Things. The single anchor localization algorithm has been designed using multiple antenna arrays, which enables the accurate and distributed localization of target nodes with a small number of anchor nodes. However, there are privacy breach issues in the localization process. To avoid the privacy breach, in this paper, an efficient privacy-preserving single anchor localization algorithm is proposed by adopting a novel noise-adding mechanism. A set of zero-sum noises has been carefully designed, which not only enables precise localization but also protects location privacy. The performance of the proposed algorithm is analyzed in terms of localization accuracy and privacy preservation. Simulations validate the correctness and theoretical results.