这个程序是MD5算法的C源代码，调试通过。可以直接应用，在网络通讯中有用。-the procedure is MD5 algorithm in C source code, debugging through. Can be directly applied in the network communications useful.

RC5-RC6 Base加密-解密源码 ,用途是：网络通讯加密。两种版本- This is the RC5-RC6 Base encryption-decryption source code which can be used in net communication encryption.IT has two editon.

网络安全通讯协议--实现三个阶段1，协商阶段。2，通讯阶段，3，链路拆除阶段-security communication protocol