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mobile agent-enabled framework for structuring and building distributed systems on the internet

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Science in China(Series F) 2006年第6期49卷 885-905页

作者： CAO Jiannong ZHOU Jingyang ZHU Weiweit LI Xuhui Internet and mobile Computing Lab Department of Computing Hong Kong Polytechnic University Hung Hom KLW Hong Kong China State Key Lab of Novel Software Technologies Nanjing University Nanjing 210093 China State Key Lab of Software Engineering Wuhan University Wuhan 430072 China

mobile agent has shown its promise as a powerful means to complement and enhance existing technology in various application areas. In particular, existing work has demonstrated that MA can simplify the development and improve the performance of certain classes of distributed applications, especially for those running on a wide-area, heterogeneous, and dynamic networking environment like the Internet. In our previous work, we extended the application of MA to the design of distributed control functions, which require the maintenance of logical relationship among and/or coordination of processing entities in a distributed system. A novel framework is presented for structuring and building distributed systems, which use cooperating mobile agents as an aid to carry out coordination and cooperation tasks in distributed systems. The framework has been used for designing various distributed control functions such as load balancing and mutual ex- clusion in our previous work. In this paper, we use the framework to propose a novel approach to detecting deadlocks in distributed system by using mobile agents, which demonstrates the advantage of being adaptive and flexible of mobile agents. We first describe the MAEDD （mobile agent Enabled Deadlock Detection） scheme, in which mobile agents are dispatched to collect and analyze deadlock information distributed across the network sites and, based on the analysis, to detect and resolve deadlocks. Then the design of an adaptive hybrid algorithm derived from the framework is presented. The algorithm can dynamically adapt itself to the changes in system state by using different deadlock detection strategies. The performance of the proposed algorithm has been evaluated using simulations. The results show that the algorithm can outperform existing algorithms that use a fixed deadlock detection strategy.

关键词： mobile agent internet computing distributed systems deadlock detection.

mobile agent Based Framework for Integrating Digital Library System

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Journal of Beijing Institute of Technology 2005年第3期14卷 264-268页

作者：张付志刘明业孔令富 School of Information Science and Technology Beijing Institute of Technology Beijing100081 China School of Information Science and Engineering Yanshan University Qinhuangdao066004 China School

Few of the current approaches to achieve the integration of digital library system have considered the influence of network factors on quality of service for the integration system of digital libraries. For this reason, a mobile agent based framework for integrating digital library system is proposed. Based on this framework, a prototype system is implemented and the key technique for it are described. Compared with the current approaches, using mobile agent technique to achieve the integration of digital library system can not only avoid transmitting a lot of data on the network, lower the dependence on network bandwidth for the system, but also improve the quality of service for the integration system of digital libraries in intermitted or unreliable network connection settings.

关键词： digital libraries system integration mobile agent prototype system

Information Service Model with mobile agent Supported

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Journal of Computer Science & Technology 2000年第2期15卷 150-157页

作者：邹涛王继成张福炎 Department of Computer Science and Technology Nanjing P.R. China

mobile agent is a kind of novel agent technology characterized by mobile, intelligent, parallel and asynchronous computing. In this paper, a new information service model that adopts mobile agent technology is introduced first, and then an experimental system DOLTRIA system that is implemented based on the model is described. The DOLTRIA system implemented by WWW framework and Java can search for relevant HTML documents on a set of Web servers. The result of experiments shows that performance implemented can be achieved by this model, and both the elapsed time and network traffic are reduced significantly.

关键词： agent mobile agent information service client/server Java

Secure Web Transcation with Anonymous mobile agent over Internet

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Journal of Computer Science & Technology 2003年第1期18卷 84-89页

作者： ChangJie Wang FangGuo Zhang Yumin Wang National Key Laboratory on ISN Xidian University Xi'an P. R. China CAIS Laboratory Information and Communications University Korea

A major problem of mobile agents is their apparent mability to authenticate transactions in hostile environments,In this paper,a new secure anonymous mobile agent scheme is proposed for the prevention of agent tempering without compromising the mobility or autonomy of the *** the scheme,a mobile agent can produce valid signature on website's bid(it means to transact a contact with the web site)on behalf of its customer ,without-revealing the customer's real private *** addition,the anonymity of the customer is also achieved when its agent tansacts with the ***,the customer who issues a malicious agent or denies the transaction can be identified and detected by agent Management Center(AMC).Thererfore,the scheme is practical in the future elecronic commerce over Internet.

关键词： mobile agent digital signature anonymity electronic commerce

QoS routing based on mobile agent for LEO satellite IP networks

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The Journal of China Universities of Posts and Telecommunications 2009年第6期16卷 57-63页

作者： RAO Yuan,WANG Ru-chuan College of Computer,Nanjing University of Posts and Telecommunications,Nanjing 230001,China College of Computer Nanjing University of Posts and Telecommunications Nanjing 230001 China

Current quality of service（QoS） routing schemes for low earth orbit（LEO） satellites IP networks either neglect the varying population density or fail to guarantee end-to-end *** a remedy,QoS routing protocol based on mobile agent（QoSRP-MA） is ***-MA is a source-based routing *** connection requests arrive,QoS mobile agents are dispatched from ingress satellite to explore routes,which migrate using satellite routing *** arriving in egress satellite,QoS mobile agents migrate back towards ingress satellite to reserve *** construct satellite routing tables,load balancing routing algorithm based on mobile agent（LBRA-MA） is *** LBRP-MA,at regular intervals mobile agents launched on all satellites migrate autonomously to evaluate path cost and update routing ***,path cost between source and destination is evaluated considering satellite geographical position as well as inter-satellite link（ISL） ***,ISL congestion index is considered to update routing *** simulations on a Courier-like constellation,it shows that QoSRP-MA can achieve guaranteed end-to-end delay bound with higher throughput,lower connection failing ratio and signaling overhead compared to high performance satellite routing（HPSR） scheme.

关键词： QoS routing load balancing mobile agent satellite IP networks

Instance-oriented delegation: A solution for providing security to Grid-based mobile agent middleware

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2005年第5期6卷 405-413页

作者：马天驰李善平 School of Computer Science and Technology Zhejiang University Hangzhou 310027 China

New challenges are introduced when people try to build a general-purpose mobile agent middleware in Grid envi- ronment. In this paper, an instance-oriented security mechanism is proposed to deal with possible security threats in such mobile agent systems. The current security support in Grid Security Infrastructure (GSI) requires the users to delegate their privileges to certain hosts. This host-oriented solution is insecure and inflexible towards mobile agent applications because it cannot prevent delegation abuse and control well the diffusion of damage. Our proposed solution introduces security instance, which is an en- capsulation of one set of authorizations and their validity specifications with respect to the agent’s specific code segments, or even the states and requests. Applications can establish and configure their security framework flexibly on the same platform, through defining instances and operations according to their own logic. Mechanisms are provided to allow users delegating their identity to these instances instead of certain hosts. By adopting this instance-oriented security mechanism, a Grid-based general-purpose MA middleware, Everest, is developed to enhance Globus Toolkit’s security support for mobile agent applications.

关键词： mobile agent Grid Trust model Delegation

Developing Check-Point Mechanism to Protect mobile agent Free-Roaming Against Untrusted Hosts

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Computers, Materials & Continua 2022年第8期72卷 3849-3862页

作者： Tarig Mohamed Ahmed Department of Information Technology FCITKing Abdulaziz UniversityJeddahSaudi Arabia

mobile agent has many benefits over traditional distributed systems such as reducing latency,bandwidth,and *** agent Systems are not fully utilized due to security *** paper focuses on mobile agent protection against malicious hosts.A new security mechanism called Checkpoints has been *** Mechanism(CPM)aims to protect mobile agent against malicious hosts in case of Capturing and Integrity *** assumes using a free-roaming mobility mechanism by mobile agent *** main idea behind CPM is to generate multiple versions of mobile *** multiple version is used to recover mobile agent from Capturing and Integrity attacks by untrusted *** versions are kept in Recovery Host(RH).RH plays a key role in CPM by controlling and monitoring MAs’recovery processes.A prototype method has been used to prove the feasibility of *** p https://***/Default-305-ARrototype was implemented by using *** framework and C#.full discussion for several scenarios has been done to analyze the feasibility and performance for *** found from this research,CPM has a strong ability to protect mobile agents from Capturing and Integrity attacks *** addition,there is no negative impact on the overall performance of the mobile agent system.

关键词： mobile agent security capturing integrity attacks

A Dynamic Building Method of mobile agent Path Based on Referral Networks

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Chinese Journal of Electronics 2014年第1期23卷 1-5页

作者： WANG Xiaolin ZENG Guangzhou XU Xinshun School of Computer Science and Technology Shandong University

The mobile agent is a computer program that is able to migrate continuously among hosts in a network and use host service to meet its task. The host,known as workplace, can be regarded as a proxy of social member. The sequence of workplaces on which the mobile agent completed its tasks is called path. In this paper, we propose a dynamic building method of mobile agent path with minimum payment based on referral. By referral, the next workplace of mobile agent can be recommended by the current workplace provider based on his acquaintance knowledge. The simulation results on a random network model show that the more acquaintance relationships there are on the referral network, the more efficiently the mobile agent path can be built, and the fewer costs need to be paid on the path.

关键词： mobile agent Path building Referral network Acquaintance tree Minimum payment

Research on cultural algorithm for solving routing problem of mobile agent

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The Journal of China Universities of Posts and Telecommunications 2008年第4期15卷 121-125页

作者： MA Jun ZHANG Jian-pei YANG Jing CHENG Li-li College of Computer Science and Technology Harbin Engineering University Harbin 150001 China

The key idea behind cultural algorithm is to explicitly acquire problem-solving knowledge from the evolving population and in return apply that knowledge to guide the search. In this article, cultural algorithm-simulated annealing is proposed to solve the routing problem of mobile agent. The optimal individual is accepted to improve the belief space＇s evolution of cultural algorithms by simulated annealing. The step size in search is used as situational knowledge to guide the search of optimal solution in the population space. Because of this feature, the search time is reduced. Experimental results show that the algorithm proposed in this article can ensure the quality of optimal solutions, and also has better convergence speed. The operation efficiency of the system is considerably improved.

关键词： cultural algorithm mobile agent routing simulated annealing