适应商务应用的安全交谈系统的行为特点及技术实现

The Character and Realization of the Secure Chat System Oriented Commercial Application

该文介绍了构建安全的在线交谈系统的机制与方法。首先介绍了数据加密的基本原理，包括密钥和两种密码体制然后，给出自行开发的交谈系统作为示例。该系统基于ｂｒｏｗｓｅｒ／ｓｅｒｖｅｒ结构，综合使用ＩＤＥＡ和ＲＳＡ算法保证数据的安全快速传输，周期性更新会话密钥并提供群组工作模式。它还可以对登录的用户进行口令认证，对加密级别进行灵活设定，对交谈信息随时进行保存或恢复。该系统将安全机制引入了在线交谈系统，以满足企业和个人实时传递重要数据的需要，尤其适用于商务应用场合。

This paper introduces the method and mechanism to create an online secure chat system which protect the data from lose. First,it introduces the basic principle of the encryption of data,including key and two kinds of cipher system. Then,the chat system developed by us is given as an example. This system is based on browser/server computing architecture,using IDEA and RSA cryptographic algorithm together to provide the data transferred in a secure and fast way. It updates the session key periodically and provides a scheme for group working. It can also authenticate the login users by password,configure the security level flexibly and save or store chat messages at any moment. In all,it realizes security in chat system,so as to meet the needs of companies and people to transfer important data in real time,especially in commercial occasions.