Paper 2016/788
On the security of Cubic UOV and its variants
Yasufumi Hashimoto
Abstract
The unbalanced oil and vinegar signature scheme (UOV) is one of signature schemes whose public key is a set of multivariate quadratic forms. Recently, a new variant of UOV called Cubic UOV was proposed at Inscrypt 2015. It was claimed that the cubic UOV was more efficient than the original UOV and its security was enough. However, an equivalent secret key of the cubic UOV can be recovered easily. In this note, we describe how to recover it. After we posted the first version of this note, Duong et al. proposed two variants of Cubic UOV at ICISC 2016. We also explain their weakness in the second version.
Note: We add comments on several variants of Cubic UOV proposed after the first version was posted.
Metadata
- Available format(s)
-
PDF
- Category
- Public-key cryptography
- Publication info
- Preprint. MINOR revision.
- Keywords
- multivariate public-key cryptosystemsUOVCubic UOV
- Contact author(s)
- hashimoto @ math u-ryukyu ac jp
- History
- 2017-05-23: revised
- 2016-08-18: received
- See all versions
- Short URL
- https://ia.cr/2016/788
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2016/788,
author = {Yasufumi Hashimoto},
title = {On the security of Cubic {UOV} and its variants},
howpublished = {Cryptology {ePrint} Archive, Paper 2016/788},
year = {2016},
url = {https://eprint.iacr.org/2016/788}
}
