Paper 2018/824 Original: eprint.iacr.org/2018/824 ↗
SeaSign: Compact isogeny signatures from class group actions
Abstract
We give a new signature scheme for isogenies that combines the class group actions of CSIDH with the notion of Fiat-Shamir with aborts. Our techniques allow to have signatures of size less than one kilobyte at the 128-bit security level, even with tight security reduction (to a non-standard problem) in the quantum random oracle model. Hence our signatures are potentially shorter than lattice signatures, but signing and verification are currently very expensive.
Metadata
- Available format(s)
PDF- Category
- Public-key cryptography
- Publication info
- Preprint.
- History
- 2019-05-20: last updated
- 2018-09-06: published
- Short URL
- https://ia.cr/2018/824
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2018/824,
author = {Luca De Feo and Steven D. Galbraith},
title = {SeaSign: Compact isogeny signatures from class group actions},
howpublished = {Cryptology {ePrint} Archive, Paper 2018/824},
year = {2018},
url = {https://eprint.iacr.org/2018/824}
}