A cryptology system without any information expansion can be regarded as a permutation. Therefore constructions of Boolean permutation with high degree and high nonlinearity have become an important study problem.
另外，布尔置换在密码体制设计中有着重要的应用，任何没有信息扩张的密码体制都可以看作是置换的结果。
参考来源 - 布尔函数的扩散性·2,447,543篇论文数据，部分数据来源于NoteExpress
In the first section of the second chapter, the Boolean permutation on general Boolean algebra has been studied.
对一般布尔代数上的布尔置换进行了研究，即第二章第一节。
Therefore constructions of Boolean permutation with high degree and high nonlinearity have become an important study problem.
因此构造出高次、非线性度高的布尔置换是一个重要的研究问题。
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