Paper 2022/1054 Original: eprint.iacr.org/2022/1054 ↗
SIDH with masked torsion point images
Abstract
We propose a countermeasure to the Castryck-Decru attack on SIDH. The attack heavily relies on the images of torsion points. The main input to our countermeasure consists in masking the torsion point images in SIDH in a way they are not exploitable in the attack, but can be used to complete the key exchange. This comes with a change in the form the field characteristic and a considerable increase in the parameter sizes.
Metadata
- Available format(s)
PDF- Category
- Public-key cryptography
- Publication info
- Preprint.
- History
- 2023-02-07: last updated
- 2022-08-15: published
- Short URL
- https://ia.cr/2022/1054
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2022/1054,
author = {Tako Boris Fouotsa},
title = {SIDH with masked torsion point images},
howpublished = {Cryptology {ePrint} Archive, Paper 2022/1054},
year = {2022},
url = {https://eprint.iacr.org/2022/1054}
}