Universally composable private proximity testing

  • Authors:
  • Rafael Tonicelli;Bernardo Machado David;Vinícius de Morais Alves

  • Affiliations:
  • Department of Electrical Engineering, University of Brasilia, Brasilia, DF, Brazil;Department of Electrical Engineering, University of Brasilia, Brasilia, DF, Brazil;Department of Electrical Engineering, University of Brasilia, Brasilia, DF, Brazil

  • Venue:
  • ProvSec'11 Proceedings of the 5th international conference on Provable security
  • Year:
  • 2011

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Abstract

This paper aims at studying privacy-preserving tests for proximity. In a private proximity test, Alice can verify if she is close to Bob without either party revealing any other information about their location. We propose a system for private proximity testing based on the pre-distribution of data: the so-called commodity-based model. Our system is proven secure in the Universal Composability (UC) framework and uses as the core building block an efficient UC-secure equality testing protocol. To our knowledge this is the first work in the literature that contemplates this problem in the UC framework.