Paper 2021/311 Original: eprint.iacr.org/2021/311 ↗
Improved Neural Aided Statistical Attack for Cryptanalysis
Abstract
At CRYPTO 2019, Gohr improved attacks on Speck32/64 using deep learning. In 2020, Chen et al. proposed a neural aided statistical attack that is more generic. Chen et’s attack is based on a statistical distinguisher that covers a prepended differential transition and a neural distinguisher. When the probability of the differential transition is pq, its impact on the data complexity is O(p^{-2}q^{-2}. In this paper, we propose an improved neural aided statistical attack based on a new concept named Homogeneous Set. Since partial random ciphertext pairs are filtered with the help of homogeneous sets, the differential transition’s impact on the data complexity is reduced to O(p^{−1}q^{−2}). As a demonstration, the improved neural aided statistical attack is applied to round-reduced Speck. And several better attacks are obtained.
Metadata
- Available format(s)
PDF- Category
- Secret-key cryptography
- Publication info
- Preprint.
- History
- 2021-03-09: last updated
- 2021-03-09: published
- Short URL
- https://ia.cr/2021/311
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2021/311,
author = {Yi Chen and Hongbo Yu},
title = {Improved Neural Aided Statistical Attack for Cryptanalysis},
howpublished = {Cryptology {ePrint} Archive, Paper 2021/311},
year = {2021},
url = {https://eprint.iacr.org/2021/311}
}