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Mini-ciphers: a reliable testbed for cryptanalysis? Nakahara, Jorge Santana de Freitas, Daniel Mini-ciphers higher-order square attacks This paper reports on higher-order square analysis of the AES cipher. We present experimental results of attack simulations on mini-AES versions with word sizes of 3, 4, 5, 6 and 7 bits and describe the propagation of higher-order Lambda-sets inside some of these distinguishers. A possible explanation of the length of the square distinguishers uses the concept of higher-order derivatives of discrete mappings. Schloss Dagstuhl – Leibniz-Zentrum für Informatik Jorge Nakahara and Daniel Santana de Freitas 2009 Is Part Of Dagstuhl Seminar Proceedings, Volume 9031, Symmetric Cryptography (2009) InProceedings Text doc-type:ResearchArticle publishedVersion application/pdf doi:10.4230/DagSemProc.09031.9 urn:nbn:de:0030-drops-19614 https://drops.dagstuhl.de/entities/document/10.4230/DagSemProc.09031.9 eng https://creativecommons.org/licenses/by/4.0/legalcode