Paper 2014/066 Original: eprint.iacr.org/2014/066 ↗
A Subexponential Construction of Graph Coloring for Multiparty Computation
Abstract
We show the first deterministic construction of an unconditionally secure multiparty computation (MPC) protocol in the passive adversarial model over black-box non-Abelian groups which is both optimal and has subexponential complexity of construction. More specifically, following the result of Desmedt et al. (2012) that the problem of MPC over non-Abelian groups can be reduced to finding a $t$-reliable $n$-coloring of planar graphs, we show the construction of such a graph which allows a path from the input nodes to the output nodes when any $t$-party subset is in the possession of the adversary. Unlike the (deterministic) constructions from Desmedt et al. (2012) our construction is subexponential and optimal at the same time, i.e., it is secure for any $t < \frac{n}{2}$.
Metadata
- Available format(s)
PDF- Category
- Cryptographic protocols
- Publication info
- Preprint.
- History
- 2014-01-30: last updated
- 2014-01-30: published
- Short URL
- https://ia.cr/2014/066
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2014/066,
author = {Hassan Jameel Asghar and Yvo Desmedt and Josef Pieprzyk and Ron Steinfeld},
title = {A Subexponential Construction of Graph Coloring for Multiparty Computation},
howpublished = {Cryptology {ePrint} Archive, Paper 2014/066},
year = {2014},
url = {https://eprint.iacr.org/2014/066}
}