一种基于移动Agent的异构网络管理模型

分析了集中式网络管理方法的局限性,介绍了移动Agent的特点及与传统方法相比的优势,提出了一种针对异构网络的基于移动Agent的网管模型,详细地介绍了该模型的设计思想、结构、管理方式及安全性、容错性、独立性等特点。设计实现了两种移动Agent:故障诊断代理和故障搜索代理。使用它们评估和验证了移动A gent管理实际的异构网络的能力,它们能够在一个特定大小的网络中准确定位故障并分析故障的原因。     

一个基于CORBA和Mobile Agent的网络管理系统模型

本文在分析了现有网管不足的基础上，介绍了将CORBA和Mobile Agent技术应用于网管的基本思想，并结合二者提出了一种新的基于CORBA和Mobile agent的网络管理系统模型     

基于数字签名的移动代理系统安全模型研究

影响移动代理技术雅广的主要因素在于安全性、效率和标准,其中安全性是一个主要因素。移动代理安全性体现在移动代理机密数据的保护、移动代理和移动代理执行平台的验证等。目前,移动代理的各种安全技术都不能提供彻底的安全性,本文通过在一个开放环境下保护移动代理系统执行代码的验证,并在此基础上给出一个基于数字签名技术
术的移动代理和移动代理执行平台安全模型MASM02。该模型在理论上能抵抗已知的各种攻击;并且本身具有简洁性,易于实施;并经过安全性分析和攻击测试,具有可靠性。     

一种基于复制组管理的移动agent容错模型

可靠性是影响目前移动agent应用扩展的一个关键问题之一,现有的分布式系统的容错方法不能完全照搬,该文提出一种基于复制组管理的移动agent容错模型ReGFatoM,通过改进已有的阶段构建模式以及加强复制组管理来提高系统的可靠性,实验表明,ReGFatoM能够有效解决诸如“只一次”执行、阻塞、网络分割等容错问题,而且具有模块化、效率高的优点。     

基于移动代理的分布式网络管理系统的研究

针对传统的基于SNMP协议的网络管理系统的不足,提出了一种采用移动代理(MobileAgent)技术来实现网络管理的模型,一定的区域内设置一个代理服务器,在网络管理服务器和代理服务器上都驻留有固定代理(StationaryAgent)。网络管理服务器根据实际情况选择适当功能的移动代理发送到代理服务器上,在代理服务器上完成预期功能。文章详细讨论系统设计和实现的关键技术,表明在网络管理中采用移动代理技术可以很好地解决目前集中式网络管理中遇到的相关问题,能有效提高网络管理的可靠性和效率。     

基于移动代理的一个鲁棒路由协议

移动代理是一种能在异质网络里各计算机间自主迁移的程序.尽管移动代理技术很适合分布式应用,但是安全问题一直是它得到更广泛应用的主要障碍之一.首先对已有的移动代理路由协议进行分析,然后提出了一个基于基本签字基本加密的移动代理路由协议,并对其安全性和计算复杂度进行了详细分析.结果表明,该协议满足路由协议的所有安全性质,而且相比原有的嵌套签字嵌套加密协议,具有更低的计算复杂度.最后,在此基础上提出了一个基于移动代理的鲁棒路由协议,该协议不需要在主机中配备安全的代理创建环境,对路由主机的配置要求不高,具有更广泛的应用性.     

Mobile Agent在网络管理中应用

探讨了传统的基于SNMP协议的网络管理系统的不足，分析了集中式网络管理方法的局限性和比较了各种分布式网络管理技术优缺点后，提出了采用移动代理技术(Mobile Agent)来实现网络管理并描述了一种用于设计和开发网络管理系统的移动代理技术的概要性实现框架。文章表明在网络管理中采用移动代理技术可以很好地解决目前集中式网络管理中遇到的相关问题，能有效提高网络管理的可靠性和效率。     

J-SEAL2—A Secure High-Performance Mobile Agent System

Even though the advantages of mobile agents for distributed electronic commerce applications have been highlighted in numerous research works, mobile agent applications are not in widespread use today. For the success of mobile agent applications, secure, portable, and efficient execution platforms for mobile agents are crucial. However, popular mobile agent systems do not meet the high security requirements of electronic commerce applications, are not portable, or cause high overhead. Currently, the majority of mobile agent platforms is based on Java. These systems simply rely on the security model of Java, although it is not suited to protect agents and service components from each other.In contrast, J-SEAL2 is a mobile agent system designed to meet the high security, portability, and performance requirements of large-scale electronic commerce applications. J-SEAL2 extends the Java environment with a model of strong protection domains. The core of the system is a micro-kernel fulfilling the same functions as a traditional operating system kernel: protection, communication, domain termination, and resource control. For portability reasons, J-SEAL2 is implemented in pure Java. This paper focuses on the design of the new communication model in J-SEAL2, which allows convenient, efficient, and mediated communication in a hierarchy of strong protection domains.     

移动代理人编程技术与移动用戶管理系统探讨

有自我控制与辨别身份能力的移动代理人编程技术,不但能够在网路上移动,也能够与其他代理人编程沟通及执行任务.由于移动代理人常常运作于异质的网路或作业系统(operating system)环境下,因此,一个具有整体逻辑性操作界面来存取实体结构的管理系统就显得越发重要.提出了一个能够追踪和维持移动代理人的管理系统,并且应用于远距教学(distance learning).此系统的主要目的在于提供移动代理人通用的存取环境.为了能使此系统完全运作,论述了移动代理人通信网路模组、移动代理人演化阶段来支援管理代理人与用户端代理人.另外,也将移动代理人所使用的工具编程整合成为角色扮演(role-setting)物件;此角色扮演物件是符合所谓应用编程驱使元件(application-driven component)的,因此,此系统也能够符合专业化利益的使用者的需求.     

一个安全的基于任务描述的移动代理系统

为解决移动代理技术中的安全问题提出了一种全新的基于任务描述的移动代理定义和实现方法,据此设计并实现了一个安全的移动代理系统.该系统通过中介/管理Agency统一派发代理,借鉴Java 2安全模型进行本地资源保护,利用信任模型管理并调整系统中平台之间的信任关系.它可以保证平台的安全,也可以利用事后的检测手段发现对代理的攻击,同时利用信任模型调整对恶意平台的信任度来维护整个系统的安全运行.     

移动代理系统综述

移动代理技术是新型的分布计算技术,具有很好的应用前景、移动代理系统是实现移动代理应用的基础框架。简述了移动代理（mobile agent)的定义和特点、移动代理系统（mobile agent system)的定义和基本内容,移动代理技术的优点和应用范围。着重讨论了8个有代表性的移动代理系统,就各自的体系结构和特色作出说明,并且综合分析了实现移动代理系统所需的技术和当前研究中存在的问题及可能的发展趋势。     

Reactive Mobility by Failure: When Fail Means Move

Mobile agent development is mainly supported by Java-based platforms and tools. However, the weak mobility model they use, the lack of adequate support for developing inference and reasoning mechanisms, added to the inherent complexity of building location-aware software, impose strong limitations for developing mobile intelligent agent systems. In this article we present MoviLog, a platform for building Prolog-based mobile agents with a strong mobility model. MoviLog is an extension of JavaLog, an integration of Java and Prolog, that allows us to take advantage of the best features of the programming paradigms they represent. MoviLog agents, called Brainlets, are able to migrate among different Web sites, either proactively or reactively, to use the available knowledge in order to find a solution. The major contribution of MoviLog is its Reactive Mobility by Failure (RMF) mechanism. RMF is a mechanism that acts when an agent needs a resource or service that is not available at the current executing site. RMF uses a distributed multi-agent system to transparently transport the executing agent to the site where the resource/service is available, thus reducing the development effort with respect to the traditional mobile agent approach, while maintaining its advantages.     

基于移动Agent的网格计算管理模型研究

基于当前的移动aget问题以及网格计算特点,在萌人的理论基础上,文中结合agent技术和网格计算研究基于移动agent的网格计算管理模型,运用系统中各个元素进行agent建模.介绍移动agent技术,以及网格计算管理模型应具备的特征,最后提出基于移动Agent的网格计算管理模型来解决网格中资源管理,作业调度,负载平衡的...     

A Security Architecture for Mobile Agent Based Applications

This paper describes a security architecture for mobile agent based systems. It defines the notion of a security-enhanced agent and outlines security management components in agent platform bases and considers secure migration of agents from one base to another. The security enhanced agent carries a passport that contains its security credentials and some related security code. Then we describe how authentication, integrity and confidentiality, and access control are achieved using the agent's passport and the security infrastructure in the agent bases. We then discuss the application of the security model in roaming mobile agents and consider the types of access control policies that can be specified using the security enhanced agents and the policy base in the agent platforms. Finally we describe the security infrastructure that implements the proposed security services and outline the development of a secure agent based application using the proposed architecture.     

基于移动agent的分布式入侵检测系统研究*

为了提高现有分布式入侵检测系统的效率和性能,提出了一种基于移动agent的分布式入侵检测系统模型。将移动agent技术应用于入侵检测中,并给出了其移动agent间的可靠通信方法,实现了agent的协同检测。实验结果表明,由于移动agent的应用,入侵检测系统的节点成为了可移动的部件,从而使该模型具有了更强的抗攻击性和入侵检测能力。     

Enhancing decentralized service discovery in open service-oriented multi-agent systems

Service-oriented multi-agent systems are dynamic systems that are populated by heterogeneous agents. These agents model their functionality as services in order to allow heterogeneous agents or other entities to interact with each other in a standardized way. Furthermore, due to the large-scale and adaptative needs of the system, traditional directory facilitators or middle-agents are not suitable for the management of agent services. This article proposes the introduction of homophily in service-oriented multi-agent systems to create efficient decentralized and self-organized structures where agents have a greater probability of establishing links with similar agents than with dissimilar ones. This similarity is based on two social dimensions: the set of services that an agent provides and the organizational roles that it plays. A second contribution is an algorithm for service discovery that it is carried out taking into account the local information that is related to the homophily between agents. The experiments compare our proposal with other proposals in distributed environments. The results show that the proposed structure and algorithm offer desirable features for service discovery in decentralized environments. Specifically, these features provide short paths and a high success rate in the service discovery process and resilience under deliberate failures.     

Performance analysis of a mobile agent prototype system based on VIRGO P2P protocols

The mobile agent technique has been broadly used in next generation distributed systems. The system performance measurement and simulation are required before the system can be deployed on a large scale. In this paper, we address performance analysis on a finite state mobile agent prototype on the basis of Virtual Hierarchical Tree Grid Organizations (VIRGO). The finite states refer to the migration, execution, and searching of the mobile agent. We introduce a novel evaluation model for the finite state mobile agent. The experimental results based on this evaluation model show that the finite mobile agents can perform well under multiple agent conditions and are superior to the traditional client/server approach. Copyright © 2013 John Wiley & Sons, Ltd.     

一种基于移动代理的网络管理系统及性能分析

当前所用的网络管理系统大都属于集中式管理模式,因此,在性能、可扩展性、灵活性等方面具有很大的局限性.基于移动代理的网络管理是针对这些不足而提出的具有潜力的解决方案之一,但是要精确地判定在什么条件下移动代理比传统的客户/服务器模式更有效是比较困难的.为此,提出了一个定量模型,从理论上分析和比较了两种结构的流量和响应时间,并就移动代理和SNMP(simple network management protocol)的性能进行了模拟实验比较.理论和实验结果都表明,当被管理的网络设备数在一定范围内时,移动代理的性能比SNMP的性能要好;对于移动代理访问固定数量的设备后再返回到网络管理器这种方案,移动代理的性能有较大的提高.     

移动数据库系统中移动Agent的嵌入

本文的研究重点旨在探讨移动agent技术在移动数据库系统中的应用，具体地说，在研究基于移动agnet的移动数据库模型的基础上，进一步探讨移动agent技术在移动查询处理和移动事务处理中具体实现的可能性和优越性，同时，研究由此产生的移动agent之间并发控制及移动数据管理，移动数据访问的问题。