[Resource Topic] 2016/1120: Cryptanalysis of Reduced round SKINNY Block Cipher

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Cryptanalysis of Reduced round SKINNY Block Cipher

Authors: Sadegh Sadeghi, Tahere Mohammadi, Nasour Bagheri


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.

ePrint: https://eprint.iacr.org/2016/1120

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