[Resource Topic] 2017/154: Linear Cryptanalysis: Key Schedules and Tweakable Block Ciphers

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Linear Cryptanalysis: Key Schedules and Tweakable Block Ciphers

Authors: Thorsten Kranz, Friedrich Wiemer, Gregor Leander


This paper serves as a systematization of knowledge of linear cryptanalysis and provides novel insights in the areas of key schedule design and tweakable block ciphers. We examine in a step by step manner the linear hull theorem in a general and consistent setting. Based on this, we study the influence of the choice of the key scheduling on linear cryptanalysis, a – notoriously difficult – but important subject. Moreover, we investigate how tweakable block ciphers can be analyzed with respect to linear cryptanalysis, a topic that surprisingly has not been scrutinized until now.

ePrint: https://eprint.iacr.org/2017/154

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