Paper 2007/366
Breaking the Symmetry: a Way to Resist the New Differential Attack
Jintai Ding, Bo-Yin Yang, Chen-Mou Cheng, Owen Chen, and Vivien Dubois
Abstract
Sflash had recently been broken by Dubois, Stern, Shamir, etc., using a differential attack on the public key. The $C^{\ast-}$ signature schemes are hence no longer practical. In this paper, we will study the new attack from the point view of symmetry, then (1) present a simple concept (projection) to modify several multivariate schemes to resist the new attacks; (2) demonstrate with practical examples that this simple method could work well; and (3) show that the same discussion of attack-and-defence applies to other big-field multivariates. The speed of encryption schemes is not affected, and we can still have a big-field multivariate signatures resisting the new differential attacks with speeds comparable to Sflash.
Metadata
- Available format(s)
-
PDF
- Category
- Public-key cryptography
- Publication info
- Published elsewhere. multivariate public key cryptography,differential, symmetry, projection
- Contact author(s)
- ding @ math uc edu
- History
- 2007-09-13: received
- Short URL
- https://ia.cr/2007/366
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2007/366,
author = {Jintai Ding and Bo-Yin Yang and Chen-Mou Cheng and Owen Chen and Vivien Dubois},
title = {Breaking the Symmetry: a Way to Resist the New Differential Attack},
howpublished = {Cryptology {ePrint} Archive, Paper 2007/366},
year = {2007},
url = {https://eprint.iacr.org/2007/366}
}
