Privacy-preserving nearest neighbor methods: comparing signals without revealing them

  title={Privacy-preserving nearest neighbor methods: comparing signals without revealing them},
  author={Shantanu Rane and Petros Boufounos},
  journal={IEEE Signal Processing Magazine},
Comparing two signals is one of the most essential and prevalent tasks in signal processing. A large number of applications fundamentally rely on determining the answers to the following two questions: 1) How should two signals be compared? 2) Given a set of signals and a query signal, which signals are the nearest neighbors (NNs) of the query signal, i.e., which signals in the database are most similar to the query signal? The NN search problem is defined as follows: Given a set S containing… CONTINUE READING
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