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 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.

中文翻译：

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类西蒙密码中密钥扩展算法的效果

在这项工作中，我们研究了密钥扩展算法的选择及其与轮函数的交互如何影响类西蒙密码对旋转异或密码分析的抵抗力。我们观察到，在我们考虑的密钥扩展算法中，西蒙的抵抗力最强，而西梅克的抵抗力要小得多。讨论了对轻量级密码设计的影响并提出了开放性问题。