Cryptanalysis of Reduced round SKINNY Block Cipher

Sadegh Sadeghi; Tahere Mohammadi; Nasour Bagheri

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Paper 2016/1120

Cryptanalysis of Reduced round SKINNY Block Cipher

Sadegh Sadeghi, Tahere Mohammadi, and Nasour Bagheri

Abstract

SKINNY is a family of lightweight tweakable block ciphers designed to have the smallest hardware footprint. In this paper, we present zero-correlation linear approximations and related-tweake impossible differential characteristics for different versions of SKINNY. We utilize meet-in-the-middle approach to construct 9-round and 10-round zero-correlation linear distinguisher. We also obtain 12-round related-tweakey impossible differential characteristics for both SKINNY-64 and 128 in TK1 model and TK2 model. To the best of our knowledge, the presented zero-correlation characteristics in this paper is the first investigation of the security of SKINNY against this attack.

Note: The FSE version

Metadata

Available format(s): PDF
Category: Secret-key cryptography
Publication info: A minor revision of an IACR publication in FSE 2019
DOI: 10.13154/tosc.v2018.i3.124-162
Keywords: SKINNY Zero-correlation linear cryptanalysis
Contact author(s): Na bagheri @ gmail com
History: 2019-05-05: revised; 2016-12-01: received; See all versions
Short URL: https://ia.cr/2016/1120
License: CC BY

BibTeX

@misc{cryptoeprint:2016/1120,
      author = {Sadegh Sadeghi and Tahere Mohammadi and Nasour Bagheri},
      title = {Cryptanalysis of Reduced round SKINNY Block Cipher},
      howpublished = {Cryptology ePrint Archive, Paper 2016/1120},
      year = {2016},
      doi = {10.13154/tosc.v2018.i3.124-162},
      note = {\url{https://eprint.iacr.org/2016/1120}},
      url = {https://eprint.iacr.org/2016/1120}
}