Welcome to the resource topic for 2022/1042
Title:
Weak Subtweakeys in SKINNY
Authors: Daniël Kuijsters, Denise Verbakel, Joan Daemen
Abstract:Lightweight cryptography is characterized by the need for low implementation cost, while still providing sufficient security. This requires careful analysis of building blocks and their composition.
SKINNY is an ISO/IEC standardized family of tweakable block ciphers and is used in the NIST lightweight cryptography standardization process finalist Romulus. We present non-trivial linear approximations of two- round SKINNY that have correlation one or minus one and that hold for a large fraction of all round tweakeys. Moreover, we show how these could have been avoided.
ePrint: https://eprint.iacr.org/2022/1042
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