利用C++实现:古典密码仿射变换\LFSR及流密码\生成非线性序列\DES算法的加、解密运算,前面几个较简单，DES算法的效果还可以-Using C++ implementation: Classical password affine transformation \ LFSR and stream password \ generate nonlinear sequences \ DES algorithm for encryption and decryption operations,