使用置换矩阵能够根据每对符号单独分配匹配得分。
A substitution matrix lets you assign match scores individually to each pair of symbols.
在迭代算法中，采用直接数据置换降低矩阵维数，节省了存储空间，提高了运算速度。
The iterative algorithms in C language were given, which used direct data replacement to reduce the dimension of matrix and saved the storage space.
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。
This paper introduces a completely nonsingular matrix based substitution permutation network that can effectively improve the performance of the block cipher against linear cryptanalysis.
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