des加密解密 算法的应用 功能：实现des加密过程中从56位的K密钥产生16个48位Ki子密钥-des encryption and decryption algorithms application functions: des encryption from the 56 K-16 48-bit key generation sub-key Ki

main函数文件输入明文，调用秘钥留生成函数（get_k文件）以及加解密函数（encrypt_fcn文件），完成对明文的加密和解密(Encryption and decryption of plaintext are accomplished by inputting main function file into plaintext, calling secret key generation function (get_k file) and encryption and decryptio

能够用MATLAB实现DES算法加密，包含密钥生成和S盒的生成函数(DES algorithm can be encrypted with MATLAB, including key generation and S-box generation function.)