Author:
Liu Yunwen,De Witte Glenn,Ranea Adrián,Ashur Tomer
Abstract
In this paper we formulate a SAT/SMT model for Rotational-XOR (RX) cryptanalysis in ARX primitives for the first time. The model is successfully applied to the block cipher family Speck, and distinguishers covering more rounds than previously are found, as well as RX-characteristics requiring less data to detect. In particular, we present distinguishers for 10, 11 and 12 rounds for Speck32/64 which have better probabilities than the previously known 9-round differential characteristic, for a certain weak key class. For versions of Speck48, we present several distinguishers, among which the longest one covering 15 rounds, while the previously best differential characteristic only covered 11.
Publisher
Universitatsbibliothek der Ruhr-Universitat Bochum
Subject
Applied Mathematics,Computational Mathematics,Computer Science Applications,Software
Cited by
24 articles.
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