Cryptology ePrint Archive: Report 2016/1120

Cryptanalysis of Reduced round SKINNY Block Cipher

Sadegh Sadeghi and 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.

Category / Keywords: secret-key cryptography / SKINNY, Zero-correlation linear cryptanalysis, Related-tweakey impossible differential cryptanalysis

Original Publication (with minor differences): IACR-FSE-2019

Date: received 27 Nov 2016, last revised 4 May 2019

Contact author: Na bagheri at gmail com

Available format(s): PDF | BibTeX Citation

Note: The FSE version

Version: 20190505:043443 (All versions of this report)

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