Analysis of Ascon, DryGASCON, and Shamash Permutations

Cihangir Tezcan

Paper 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.

Note: Published version is available at https://www.ijiss.org/ijiss/index.php/ijiss/article/view/762

Metadata

Available format(s): PDF
Category: Secret-key cryptography
Publication info: Published elsewhere. International Journal of Information Security Science
Keywords: lightweight cryptography authenticated encryption cryptanalysis
Contact author(s): cihangir @ metu edu tr
History: 2020-11-19: received
Short URL: https://ia.cr/2020/1458
License: CC BY

BibTeX

@misc{cryptoeprint:2020/1458,
      author = {Cihangir Tezcan},
      title = {Analysis of Ascon, DryGASCON, and Shamash Permutations},
      howpublished = {Cryptology ePrint Archive, Paper 2020/1458},
      year = {2020},
      note = {\url{https://eprint.iacr.org/2020/1458}},
      url = {https://eprint.iacr.org/2020/1458}
}