导　　师： 李炳法

学科专业： 081203

授予学位： 硕士

作　　者： ;

机构地区： 四川大学

摘　　要： 移动AGENT是一种可以在网络中漫游的具有一定智能性的程序,它是一个新的分布式技术.移动AGENT技术近年来受到广泛的关注,它为我们提供了崭新的、高效的分布式问题解决方法,同时,移动AGENT技术也产生出新的人机交互方式.移动AGENT系统的安全问题是AGENT技术中最为困难也是非常关键的课题.我们在前人已有的工作基础上,引入数字水印的概念,进一步加强移动AGENT的安全性.该文将数字水印技术引入到移动AGENT系统中,试图利用水印在信息安全方面独特优势,探讨一种新的移动AGENT安全框架,文中对移动AGENT技术背景、数字水印理论进行了研究,并且提出了基于水印技术的安全框架,构造了水印快速检测算法和水印验证办议.最后从实验角度进一步分析了该文安全框架的可行性.文章中提出的基于数字水印技术的移动AGENT安全框架解决方案,包括水印载体-JAVA代码水印嵌入过程描述、算法设计、系统整体框架设计以及最终的协议制定,我们没有选择频域下水印添加、检测的算法,主要是考虑到水印检测的效率和AGENT实际的生存周期等因素.当然,如果系统性能允许,我们也可以选择频域算法,但这在具体实现上也会遇到一些困难,诸如需要精心构造伪代码程序片段,以避免出现JAVA语法错误的局面等.安全问题是阻碍移动AGENT技术发展的关键因素,目前AGENT技术还没有成为INTERNET上一种成功的方案,该文引入数字水印技术,旨在研究移动AGENT的安全问题,探索一种可能的安全框架. Mobile agents are small intelligent programs that travel around in a computer network. Mobile intelligent agent technology has drawn a tremendous amount of attention from researchers in Internet computing recently as it promises to provide an elegant and efficient way of solving complex distributed problems, as well as offering a new approach to human-computer-interaction. Security of mobile agent system is one of the most difficult problems and the key issue in mobile agent research area. We introduce digital watermark technology in to mobile agent system, which is based on the achievement of predecessors in this area. We try to utilize the great advantage of digital watermark in information security aspect to make the system safer, with the concept of digital watermark we could strengthen the solidity of agent system. We make out a very novel architecture of mobile agent and discuss in detail. In this thesis, we introduce the background of mobile agent, the theory about digital watermark and security architecture. We create a new architecture of mobile agent to solve security problem, finally we verify our new concept by experiment. The idea about the security architecture based on watermark technology in this dissertation includes mobile code protection in JAVA programs, algorithms of watermark embedding, decoding and verification. We also define some protocols to insure the communication of agent safe. Security problem hurdles the evolution of mobile agent technology, which has drown great concern of researchers in information processing. There is no successful solution to the mobile agent security until now. We introduce digital watermark to search a new way to construct the secure architecture of mobile agent.

关 键 词： 移动 技术 水印验证协议 代码水印 数字水印 小波变换 混沌序列

分 类 号： [TP391.41]

领　　域： [自动化与计算机技术] [自动化与计算机技术]