License: Creative Commons Attribution 3.0 Unported license (CC BY 3.0)
When quoting this document, please refer to the following
DOI: 10.4230/LIPIcs.ITC.2020.5
URN: urn:nbn:de:0030-drops-121104
Go to the corresponding LIPIcs Volume Portal

Eerikson, Hendrik ; Keller, Marcel ; Orlandi, Claudio ; Pullonen, Pille ; Puura, Joonas ; Simkin, Mark

Use Your Brain! Arithmetic 3PC for Any Modulus with Active Security

LIPIcs-ITC-2020-5.pdf (0.6 MB)


Secure multiparty computation (MPC) allows a set of mutually distrustful parties to compute a public function on their private inputs without revealing anything beyond the output of the computation. This paper focuses on the specific case of actively secure three-party computation with an honest majority. In particular, we are interested in solutions which allow to evaluate arithmetic circuits over real-world CPU word sizes, like 32- and 64-bit words. Our starting point is the novel compiler of Damgård et al. from CRYPTO 2018. First, we present an improved version of it which reduces the online communication complexity by a factor of 2. Next, we replace their preprocessing protocol (with arithmetic modulo a large prime) with a more efficient preprocessing which only performs arithmetic modulo powers of two. Finally, we present a novel "postprocessing" check which replaces the preprocessing phase. These protocols offer different efficiency tradeoffs and can therefore outperform each other in different deployment settings. We demonstrate this with benchmarks in a LAN and different WAN settings. Concretely, we achieve a throughput of 1 million 64-bit multiplications per second with parties located in different continents and 3 million in one location.

BibTeX - Entry

  author =	{Hendrik Eerikson and Marcel Keller and Claudio Orlandi and Pille Pullonen and Joonas Puura and Mark Simkin},
  title =	{{Use Your Brain! Arithmetic 3PC for Any Modulus with Active Security}},
  booktitle =	{1st Conference on Information-Theoretic Cryptography (ITC 2020)},
  pages =	{5:1--5:24},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-151-1},
  ISSN =	{1868-8969},
  year =	{2020},
  volume =	{163},
  editor =	{Yael Tauman Kalai and Adam D. Smith and Daniel Wichs},
  publisher =	{Schloss Dagstuhl--Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{},
  URN =		{urn:nbn:de:0030-drops-121104},
  doi =		{10.4230/LIPIcs.ITC.2020.5},
  annote =	{Keywords: Secure Multiparty Computation, Information Theoretic Security}

Keywords: Secure Multiparty Computation, Information Theoretic Security
Collection: 1st Conference on Information-Theoretic Cryptography (ITC 2020)
Issue Date: 2020
Date of publication: 04.06.2020

DROPS-Home | Fulltext Search | Imprint | Privacy Published by LZI