通过对常用的替换算法和置换算法加密原理的学习研究，设计了新的压缩加密方法，该算法由替换算法和置换算法两部分组成。-　　　In the Matlab programming,eventually be able to achieve in the Matlab in any input commonly used characters,and output ciphertext after encryption algorithm.The experimental results verify the reliability and validity of the algorithm.