Paper 2018/474
Minimising Communication in Honest-Majority MPC by Batchwise Multiplication Verification
Peter Sebastian Nordholt and Meilof Veeningen
Abstract
In this paper, we present two new and very communication-efficient protocols for maliciously secure multi-party computation over fields in the honest-majority setting with abort. Our first protocol improves a recent protocol by Lindell and Nof. Using the so far overlooked tool of batchwise multiplication verification, we speed up their technique for checking correctness of multiplications (with some other improvements), reducing communication by 2x to 7x. In particular, in the 3PC setting, each party sends only two field elements per multiplication. We also show how to achieve fairness, which Lindell and Nof left as an open problem. Our second protocol again applies batchwise multiplication verification, this time to perform 3PC by letting two parties perform the SPDZ protocol using triples generated by a third party and verified batchwise. In this protocol, each party sends only 4/3 field elements during the online phase and 5/3 field elements during the preprocessing phase.
Metadata
- Available format(s)
- Category
- Cryptographic protocols
- Publication info
- Published elsewhere. Major revision. Proceedings ACNS 2018
- Keywords
- multi-party computation
- Contact author(s)
- meilof @ gmail com
- History
- 2018-05-23: revised
- 2018-05-23: received
- See all versions
- Short URL
- https://ia.cr/2018/474
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2018/474, author = {Peter Sebastian Nordholt and Meilof Veeningen}, title = {Minimising Communication in Honest-Majority {MPC} by Batchwise Multiplication Verification}, howpublished = {Cryptology {ePrint} Archive, Paper 2018/474}, year = {2018}, url = {https://eprint.iacr.org/2018/474} }