Cryptanalysis of Reduced round SKINNY Block Cipher

Sadegh Sadeghi; Tahere Mohammadi; Nasour Bagheri

Paper 2016/1120 Original: eprint.iacr.org/2016/1120 ↗

Cryptanalysis of Reduced round SKINNY Block Cipher

Sadegh Sadeghi

Tahere Mohammadi

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.

Metadata

Available format(s): PDF
Category: Secret-key cryptography
Publication info: Preprint.
History: 2019-05-05: last updated; 2016-12-01: published
Short URL: https://ia.cr/2016/1120
License: https://creativecommons.org/licenses/by/4.0/

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},
      url = {https://eprint.iacr.org/2016/1120}
}