多种加解密程序，MFC界面。DH，对称密钥，公钥加解密。socket过程。-A variety of encryption and decryption procedures, MFC interface. DH, symmetric key, public key encryption and decryption. socket process.

两端传输加密的demo程序，采用c/s架构的socket通讯，加密算法使用RC4算法-Both ends of the transmission of encrypted demo program, c/s architecture socket communication, encryption algorithm using the RC4 algorithm