Cryptology ePrint Archive: Report 2020/1458
Analysis of Ascon, DryGASCON, and Shamash Permutations
Cihangir Tezcan
Abstract: Ascon, DryGASCON, and Shamash are submissions to NIST's lightweight cryptography standardization process and have similar designs. We analyze these algorithms against subspace trails, truncated differentials, and differential-linear distinguishers. We provide probability one 4-round subspace trails for DryGASCON-256, 3-round subspace trails for \DryGASCON-128, and 2-round subspace trails for \Shamash permutations. Moreover, we provide the first 3.5-round truncated differential and 5-round differential-linear distinguisher for DryGASCON-128. Finally, we improve the data and time complexity of the 4 and 5-round differential-linear attacks on Ascon.
Category / Keywords: secret-key cryptography / lightweight cryptography, authenticated encryption, cryptanalysis
Original Publication (in the same form): International Journal of Information Security Science
Date: received 18 Nov 2020
Contact author: cihangir at metu edu tr
Available format(s): PDF | BibTeX Citation
Note: Published version is available at https://www.ijiss.org/ijiss/index.php/ijiss/article/view/762
Version: 20201119:094949 (All versions of this report)
Short URL: ia.cr/2020/1458
[ Cryptology ePrint archive ]