实现加密解密功能，利用matlab开发环境，涉及轮密钥的运用-The encryption and decryption functions, matlab development environment, involving the use of round keys

this coding use for students who use matlab steganography. the code will be highly used in recent times.-this coding use for students who use matlab steganography. the code will be highly used in recent times.

利用matlab语言实现的DES算法，其特点是加入了UDP发送与接收模块，可以实现加密数据后的网络发送与接受后的解密-The use of DES algorithm matlab language, which is characterized by adding UDP send and receive modules can realize the network send and receive encrypted data after decryption post