Presence服务中授权机制的研究

摘要

随着IP通信业务的发展,Presence业务在通信系统中起着越来越重要的作用.用户发布的Presence信息包含越来越多的私人信息和敏感信息,Presence服务器需要经过发布者授权后才能把Presence信息发布给观察者.针对授权规则问题IETF提出了两种解决方法:Watcher Info机制和XCAP机制.本文主要介绍基于SIMPLE的Presence服务系统中两种机制的实现方法,对比分析两种机制的优缺点,在此基础上分析两者的发展前景.%With the development of IP communication, Presence plays an increasingly important role in communication system. Presence information is sensitive and private, a Presence server needs authorization from the presentity prior to handing out Presence information. The IETF proposes two solutions to deal with authorization problem: Watcher Info mechanism and XCAP mechanism. This paper describes the implementation of the two mechanisms in a Presence server based on SIMPLE, comparatively analyzes the advantages and disadvantages of the two mechanisms, and based on this, discusses their prospects.