This paper introduces a new framework and a generalization of the various flavors of related-key attacks. The new framework allows for combining all the previous related-key attacks into a complex, but much more powerful attack. The new attack is independent of the number of rounds of the cipher. This property holds even when the round functions of the cipher use different subkeys. The strength of our new method is demonstrated by an attack on 4r-round IDEA, for any r. This attack is the first attack on a widely deployed block cipher which is independent of the number of rounds. The variant of the attack with r = 2 is the first known attack on 8-round IDEA.
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机译：本文介绍了一个新的框架以及相关密钥攻击的各种形式的概括。新框架允许将所有以前的相关密钥攻击组合为复杂但功能更强大的攻击。新的攻击与密码的轮数无关。即使密码的舍入函数使用不同的子密钥，该属性也将保留。对任何r攻击4r轮IDEA都证明了我们新方法的优势。此攻击是对广泛部署的分组密码的首次攻击，该密码与轮数无关。 r = 2的攻击变体是8轮IDEA上的第一个已知攻击。
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