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1·Thee tweet is a substitution cipher, in which each letter is swapped for another.

这则推特消息是一个替代密码。 每一个字母都被另一个替代。

2·The block cipher with a substitution permutation network is the best known and widely used block cipher system.

包含代替置换网络的分组密码是一种广泛使用的分组密码系统。

3·In cryptography, a cipher produced by a composition of a number of substitution and transposition ciphers.

密码学中，由替代密码和置换密码结合使用而构成的一种密码。

4·Therefore, using large completely nonsingular matrix based substitution permutation networks can effectively improve cipher security in relation to differential cryptanalysis.

指出了使用大规模的基于全奇异矩阵的代替置换网络可有效地提高分组密码抗差分密码分析的安全性。

5·This paper proposes a matrix based substitution permutation network as the model of block cipher.

论文提出了一种基于矩阵的代替置换网络模型。

6·The cipher blocks are obtained by 8 rounds of substitution and the Modulo-Plus function.

密文块是通过8轮的替换和模加运算得到的。

7·This paper introduces a completely nonsingular matrix based substitution permutation network that can effectively improve the performance of the block cipher against linear cryptanalysis.

论文介绍了一种基于全非奇异矩阵的代替置换网络，它可有效的提高分组密码抗线性密码分析的能力。