文档介绍：南京邮电大学
硕士学位论文
IMS(IP多媒体子系统)接入机制的研究
姓名:邵明方
申请学位级别:硕士
专业:通信与信息系统
指导教师:张理云
2011-03
南京邮电大学硕士研究生学位论文摘要
摘要
AKA 机制是由因特网工程任务组(IETF)制定、并被 3GPP 应用于 3G 无线网络的鉴权
机制。IMS 的鉴权机制沿用了这种机制的原理和核心算法,故称之为 IMS AKA 机制。用
户在接入 IMS 网络的过程中,首先要进行分组域的接入认证,然后经过认证注册接入到 IMS
网络,两个过程在流程上有很多的重复之处,这使得用户接入到 IMS 网络的过程比较复杂,
同时效率也较低。另外,传统的 IMS AKA 机制对用户注册的安全性考虑的不够周全,IMS
的接入过程存在一些不安全因素,使得受攻击的可能性提高了。
本文主要研究了 IMS AKA 机制和 Guangquan Chen 等提出的一种改进的注册流程,着
重分析了这些注册流程存在的安全缺陷和效率较低的问题,并在此基础上提出了自己的改
进方法,设计了一种新的注册机制,提高了注册流程的安全性和效率,并在安全性和效率
方面对改进的注册机制进行了分析和仿真。
关键词:IMS,AKA,认证

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南京邮电大学硕士研究生学位论文 Abstract
Abstract
AKA mechanism is defined by the engineering task force (IETF), and was adopted
by the 3GPP, widely used in 3G work. IMS Authentication mechanism made use of
this mechanism and the principle of core arithmetic ,so we call it IMS AKA mechanism. When
Users want to be in work ,they have to experience Packet domain Authentication,and
then the IMS domain Authentication, the two processes in the process have a lot of repetition , so
the the process of accessment in work is plicated,also it is low efficiency. The
traditional IMS AKA mechanism did not consider well enough on the safety of user registration,
IMS access process exists some unsafe factors make it more likely attacked .
This article puts emphasis on the IMS AKA mechanism and the improved registration
processes of Guangquan Chen, mainly analyses the potential problems on safety defects. Based
on this, I put forward my own improvement method and design a new registration system,so it
can improve the security and efficiency of the registeration process, and the results are verified
in the simulation.

Key words: IMS, AKA, authentication

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南京邮电大学硕士研究生学位论文缩略词表
缩略词表
AAA Authentication,Authorization,Accounting 认证、授权和计费
AP Access Point 接入点
APN Access Point Name 接入点名称
AS Application Server 应用服务器
AUC Authentication Center 鉴权中心
BGCF Breakout Gateway Control