Constant-Round multi-party private set union using reversed laurent series

  • Authors:
  • Jae Hong Seo;Jung Hee Cheon;Jonathan Katz

  • Affiliations:
  • National Institute of Information and Communications Technology, Tokyo, Japan;ISaC & Dept. of Mathematical Sciences, Seoul National University, Seoul, Korea;Dept. of Computer Science, University of Maryland, Maryland

  • Venue:
  • PKC'12 Proceedings of the 15th international conference on Practice and Theory in Public Key Cryptography
  • Year:
  • 2012

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Abstract

We introduce the idea of associating a set of elements with a rational function represented using a reversed Laurent series . Using this representation, we propose private set-union protocols in the multi-party setting, assuming an honest majority. Our protocols are the first efficient protocol for private set union with constant round complexity (in both the semi-honest and malicious settings), as well as the first with statistical security (in the semi-honest setting).