Cryptology ePrint Archive: Report 2019/1249
Related-key Attack on 5-Round Kuznyechik
Vitaly Kiryukhin
Abstract: The first related-key attack on 3-round (of 9) Kuznyechik with 2-round
(of 8) key schedule was presented in CTCrypt'18. This article describes
a related-key attack on 5-round cipher with the same key schedule.
The presented one also has a practical complexity ($2^{32}$ operations,
$2^{30}$ memory, $2^{16}$ related keys) and verified in practice.
We obtained result due to the simultaneous use of the integral properties
of the cipher transformations and the key schedule.
Category / Keywords: secret-key cryptography / Kuznyechik, related-key attack, integral cryptanalysis
Original Publication (in the same form): CTCrypt 2019, 8th Workshop on Current Trends in Cryptology
Date: received 24 Oct 2019, last revised 24 Oct 2019
Contact author: vitaly kiryukhin at infotecs ru
Available format(s): PDF | BibTeX Citation
Version: 20191028:075639 (All versions of this report)
Short URL: ia.cr/2019/1249
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