Paper 2019/1360 Original: eprint.iacr.org/2019/1360 ↗
Sashimi: Cutting up CSI-FiSh secret keys to produce an actively secure distributed signing protocol
Abstract
We present the first actively secure variant of a distributed signature scheme based on isogenies. The protocol produces signatures from the recent CSI-FiSh signature scheme. Our scheme works for any access structure, as we use a replicated secret sharing scheme to define the underlying secret sharing; as such it is only practical when the number of maximally unqualified sets is relatively small. This, however, includes the important case of full threshold, and $(n,t)$-threshold schemes when $n$ is small.
Metadata
- Available format(s)
PDF- Category
- Cryptographic protocols
- Publication info
- Preprint.
- History
- 2020-01-29: last updated
- 2019-11-27: published
- Short URL
- https://ia.cr/2019/1360
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2019/1360,
author = {Daniele Cozzo and Nigel P. smart},
title = {Sashimi: Cutting up CSI-FiSh secret keys to produce an actively secure distributed signing protocol},
howpublished = {Cryptology {ePrint} Archive, Paper 2019/1360},
year = {2019},
url = {https://eprint.iacr.org/2019/1360}
}