DES 算法的介绍和实现1和2，供大家参考-DES algorithm introduced and achieve 1 and 2, for your reference

实现三种加密解密算法：1、 简单的移位算法；2、 基于矩阵的置换算法；3、 Des算法；-Encryption and decryption algorithm for the realization of the three: 1, a simple shift algorithm 2, the replacement algorithm based on the matrix 3, Des algorithm