随着计算机技术的飞速发展，网络无时不刻在改变人们的生活方式和工作方式，网络化已经成为当今社会发展的一个重要特征。随之而来的网络信息安全，也成为了全球的热点问题。如果一个国家不能保证网络信息的安全，就不能保证社会经济生活等各种活动的有序进行。网上谈判属于电子商务活动，在网上谈判中需要建立一个安全、便捷的电子商务应用环境，PKI对于保证网络谈判过程中的信息安全性有一定意义。

本文主要研究网上谈判中信息安全保障问题。首先对网上谈判的原理、过程和发展趋势进行了一个全面论述。然后根据信息安全现状及存在问题，阐述了PKI、防火墙和IDS等安全保障机制，重点研究PKI，并且对PKI的应用和发展作了更深一步的论述。接着以江阴焱鑫科技有限公司为例，研究其网络拓扑结构，对其网上谈判的安全隐患进行分析，主要以黑客攻击的形式体现，针对这些问题利用PKI来实施部署，保障网上谈判中的信息安全，最后总结部署后系统的安全性能。

-Along with the rapid development of computer technology, network which has become an important feature of current social development , is changing people s lifestyle and working style all the time. The consequent network information security has also become a hot spot in a global area. If a country can not guarantee the security of network information, it will not be able to ensure the orderly conduct of the social and economic life and other activities. Online negotiations belong to the e-commerce activities, and it is necessary to establish a safe and convenient e-commerce application environment. PKI for the network to ensure the information security in the negotiation process has certain significance.

This paper mainly studies the information security issues during online negotiations. First of all, we make a comprehensive exposition of the principles, processes and development trends of the online negotiations. Then according to the information security status and existed problem