Paper 2020/689 Original: eprint.iacr.org/2020/689 ↗
Single Tweakey Cryptanalysis of Reduced-Round SKINNY-64
Abstract
Skinny is a lightweight tweakable block cipher which received a great deal of cryptanalytic attention following its elegant structure and efficiency. Inspired by the Skinny competitions, multiple attacks on it were reported in different settings (e.g. single vs. related-tweakey) using different techniques (impossible differentials, meet-in-the-middle, etc.). In this paper we revisit some of these attacks, identify issues with several of them, and offer a series of improved attacks which were experimentally verified. Our best attack can attack up to 18 rounds using $2^{60}$ chosen ciphertexts data, $2^{116}$ time, and $2^{112}$ memory.
Metadata
- Available format(s)
PDF- Category
- Secret-key cryptography
- Publication info
- Preprint.
- History
- 2020-06-09: last updated
- 2020-06-09: published
- Short URL
- https://ia.cr/2020/689
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2020/689,
author = {Orr Dunkelman and Senyang Huang and Eran Lambooij and Stav Perle},
title = {Single Tweakey Cryptanalysis of Reduced-Round SKINNY-64},
howpublished = {Cryptology {ePrint} Archive, Paper 2020/689},
year = {2020},
url = {https://eprint.iacr.org/2020/689}
}