Paper 2020/689
Single Tweakey Cryptanalysis of Reduced-Round SKINNY-64
Orr Dunkelman, Senyang Huang, Eran Lambooij, and Stav Perle
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. MINOR revision.
- Keywords
- Skinnydifferential cryptanalysisblock cipherscryptanalysis
- Contact author(s)
-
eranlambooij @ gmail com
orrd @ cs haifa ac il - History
- 2020-06-09: received
- Short URL
- https://ia.cr/2020/689
- License
-
CC BY
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}
}
