信任机制在即时通信系统中的应用研究

即时通信（instant messaging，IM）的发展和广泛应用，极大地改变了人与人之间的信息交流方式，但也带来了一系列新的安全问题。本文首先分析了使用IM系统时存在的安全问题，研究了现有解决方法存在的不足，论述了如何将信任机制应用到IM系统中的设想，从而防止恶意代码传播、身份伪冒和垃圾信息等安全问题，并给出信任模型的建立方法。

The Study of Trust Mechanism Using in Instant Messaging System

With the abroad applications and the rapid developments of instant messaging, it makes the way of communication between peoples change greatly. But there are some new problems of security coming with it. In this paper, the problem of security in IM is presented and the shortcomings of the existing resolvent are analyzed. Then how to apply trust mechanism to IM system is discussed for enhancing the security of using IM, such as malice code, faking identity and trash message. Last the way to make a trust model is given.