At present , it is difficult to find a general standard that satisfies all kinds of security levels for the embedded system . so we must establish our own security system for the embedded internet web system developed by ourselves . this thesis consists of two parts . the first one introduces characteristic of embedded internet web system and some fashion security systems used for the internet and then analyzes ssl protocol and its security capabilities carefully 本论文主要由两部分构成，第一部分介绍了嵌入式web服务器浏览器的特点以及国内外目前在网络上运行的主要安全系统，详细介绍了当前最流行的用于web系统的安全传输协议? ssl协议，并对ssl协议的安全性进行了全面的分析，最后决定对ssl协议进行改造使其适合在嵌入式环境中运行。
The result shows that the new one could run as fast as the old , while offering much hight security insurance . the output bit flow of the new has a good randomicity that is quite useful for preventing hacking . due to the scarcity of technologies and reference , the new protocol has its shortcomes 仿真的结果显示，新的网络交易安全协议的运行效率和原有的ssl协议非常接近，却能提供比后者更高的安全性，黑客所能监听到的只是高度随机的bit流，从通信原理上来讲，对其进行破解具有相当难度。
