As applications of our methodology, we first present a 10-round integral distinguisher for Skinny, proposed at CRYPTO 2016 which is of one round more than that found by using the previous method. For Midori, proposed at ASIACRYPT 2015, the designers have obtained a 3.5-round integral characteristic. Surprisingly, we find 7-round integral distinguishers both for Midori64 and Midori128.
Most importantly, we obtain the longest integral distinguishers for block ciphers with a binary diffusion layer. It seems that any more improvement of this kind of integral distinguishers using the division property is impossible. Therefore, the technique can be used to prove security against division cryptanalysis, and we can hopefully expect it to become a useful technique for designers.Category / Keywords: Binary diffusion layer \and Skinny block cipher \and Midori block cipher \and MILP \and Division property \and Integral attack} Date: received 24 Feb 2017, last revised 28 Feb 2017 Contact author: wzhang at esat kuleuven be Available format(s): PDF | BibTeX Citation Version: 20170228:191226 (All versions of this report) Short URL: ia.cr/2017/188 Discussion forum: Show discussion | Start new discussion