DH算法是W.Diffie和M.Hellman提出的。此算法是最早的公钥算法。它实质是一个通信双方进行密钥协定的协议：两个实体中的任何一个使用自己的私钥和另一实体的公钥，得到一个对称密钥，这一对称密钥其它实体都计算不出来。

This Document gives the Steps for Diffie Hellman Program

Demo Classic Diffie-Hellman

Implement Diffie-Hellman Key exchange protocol and demonstrate that at the end, both person will have a common Key. Do the following: 1. Set a variable p ( e.g. p = 37) and g (e.g. g = 5). 2. Generate a, a random number mod p. Now generate A,