Title
:On the Effect of the Key-expansion Algorithm in Simon-like ciphers
Author
: Jinyu Lu, Yunwen Liu, Tomer Ashur and Chao Li
Abstract
:In this work we investigate how the choice of the key-expansion algorithm and its interaction with the round function affect the resistance of Simon-like ciphers
against rotational-XOR (RX) cryptanalysis. We observe that among the key-expansion algorithms we consider, Simon is most resistant, while Simeck is much less so. Implications on lightweight ciphers design are discussed and open questions are proposed.
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This is the source code for searching RX-characteristics
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