An application of the theory of permutations in breaking the enigma cipher 置换理论在破译enigma密码中的应用
The results obtained in this thesis offers some new ideas and methods for studying of permutation theory in block cipher system 上述工作为分组密码中置换理论的研究提供了新的方法、新的思路,并得到了一批好的置换源。
Block cipher is an important branch of mordant cryptography , and permutation theory has an important role in studying and designing of block cipher 分组密码是现代密码学中的一个重要研究分支,而置换理论在分组密码的研究与设计中有着重要的地位。
First a review of developing history and designing principle of block cipher is given and the important function of permutation theory in block cipher is presented in this thesis 本文首先综述了分组密码的发展历程、设计原理,以及置换理论在这个体制设计中的重要作用。
置换: displace; substitute; supers ...理论: theory置换理论;交代学说: replacement theory置换理论在破译enigma密码中的应用: an application of the theory of permutations in breaking the enigma cipher变换理论: transformation theory交换理论: exchange theory; switching theory热交换理论: heat transfer theory替换理论: replacement theory动量转换理论: momentum-transfer theory符号交换理论: symbolic interactionism theory介子交换理论: meson exchange theory社会交换理论: social exchange theory生成转换理论: generative transformational theory课税的交换理论: exchange theory of taxation领导的交换理论: exchange leadershitheories领导者成员交换理论: leadermember exchange theory; member exchange theory学习迁移的关系转换理论: transposition theory of learning transfer置换: displace; substitute; supersede; substitution; replacement; permutation; transposition; transposing; replacing; metathesis; displacement 置换出来 cement out; 锌置换了稀酸中的氢。 zinc displaces the hydrogen of dilute acids 交换理想: abelian ideal置换率;置换比: displacement ratio理论: theory 理论学习 study of the theory; 理论联系实际 integration of theory with practice; unite theory with practice; 理论脱离实际 theory divorced from practice; discrepancy between theory and practice; 在理论上 in terms of theory; on the theoretical plane; theortically; 理论队伍 theoretical contingent; 理论概括 theoretical generalization; framework; 理论根源 theoretical source; 理论工作 theoretical work; 理论公式 theoretical formula; 理论化 theorization; 理论基础 rationale; 理论家 theoretician; 理论价格 theoretical price; 理论科学学 theoretical science of science; 理论框架 theoretical frame; 理论轮廓 theoretical profile; 理论骗子 theoretical swindler; 理论水平 theoretical level; 理论思维 theoretical thinking; 理论素养 theoretical attainment 交换理想, 阿贝耳理想: abelian ideal骨置换: bone replacement核置换: nucleus substitution互置换: double replacement