Paper 2018/949
Constructing TI-Friendly Substitution Boxes using Shift-Invariant Permutations
Si Gao, Arnab Roy, and Elisabeth Oswald
Abstract
The threat posed by side channels requires ciphers that can be efficiently protected in both software and hardware against such attacks. In this paper, we proposed a novel Sbox construction based on iterations of shift-invariant quadratic permutations and linear diffusions. Owing to the selected quadratic permutations, all of our Sboxes enable uniform 3-share threshold implementations, which provide first order SCA protections without any fresh randomness. More importantly, because of the "shift-invariant" property, there are ample implementation trade-offs available, in software as well as hardware. We provide implementation results (software and hardware) for a four-bit and an eight-bit Sbox, which confirm that our constructions are competitive and can be easily adapted to various platforms as claimed. We have successfully verified their resistance to first order attacks based on real acquisitions. Because there are very few studies focusing on software-based threshold implementations, our software implementations might be of independent interest in this regard.
Note: Fixing incorrect data in Table 1, 28 contains 4 linear permutations.
Metadata
- Available format(s)
-
PDF
- Publication info
- Published elsewhere. Major revision. CT-RSA 2019
- Keywords
- Shift-invariantThreshold implementationSbox
- Contact author(s)
- si gao @ bristol ac uk
- History
- 2019-02-15: last of 4 revisions
- 2018-10-09: received
- See all versions
- Short URL
- https://ia.cr/2018/949
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2018/949,
author = {Si Gao and Arnab Roy and Elisabeth Oswald},
title = {Constructing {TI}-Friendly Substitution Boxes using Shift-Invariant Permutations},
howpublished = {Cryptology {ePrint} Archive, Paper 2018/949},
year = {2018},
url = {https://eprint.iacr.org/2018/949}
}
