On the Message Complexity of Secure Multiparty Computation

Yuval Ishai; Manika Mittal; Rafail Ostrovsky

Paper 2018/038

On the Message Complexity of Secure Multiparty Computation

Yuval Ishai, Manika Mittal, and Rafail Ostrovsky

Abstract

We study the minimal number of point-to-point messages required for general secure multiparty computation (MPC) in the setting of computational security against semi-honest, static adversaries who may corrupt an arbitrary number of parties. We show that for functionalities that take inputs from $n$ parties and deliver outputs to $k$ parties, $2 n + k - 3$ messages are necessary and sufficient. The negative result holds even when given access to an arbitrary correlated randomness setup. The positive result can be based on any 2-round MPC protocol (which can in turn can be based on 2-message oblivious transfer), or on a one-way function given a correlated randomness setup.

Metadata

Available format(s): PDF
Publication info: Published by the IACR in PKC 2018
Keywords: Secure Multiparty Computation
Contact author(s): yuvali @ cs technion ac il
manikamittal22 @ gmail com
rafail @ cs ucla edu
History: 2018-01-08: received
Short URL: https://ia.cr/2018/038
License: CC BY

BibTeX

@misc{cryptoeprint:2018/038,
      author = {Yuval Ishai and Manika Mittal and Rafail Ostrovsky},
      title = {On the Message Complexity of Secure Multiparty Computation},
      howpublished = {Cryptology {ePrint} Archive, Paper 2018/038},
      year = {2018},
      url = {https://eprint.iacr.org/2018/038}
}