基于神经网入侵检测研究与设计

近年来,网络的攻击变得越来越普遍,也越来越难于防范,传统的技术如防火墙难于满足目前网络安全的需要,一项新的网络安全技术—网络入侵检测技术被提出,它能很好的解决其他技术的不足,但是目前的入侵检测技术在入侵检测的准确性和可靠性上还存在问题。本文首先介绍了入侵检测中的特点,然后对神经网络做了详细的介绍,最后设计了一个基于神经网络的入侵检测系统。     

移动Ad Hoc网络的入侵响应研究

传统网络中的入侵阻止和检测等防护方法在网络结构脆弱、节点移动的移动自组网络中无法达到预期效果。将移动代理引入无线自组网络中,设计分布式入侵检测响应系统,通过多种功能的移动代理实现入侵检测功能,并在入侵检测的基础上利用移动代理跟踪、隔离入侵节点,对入侵节点做出及时响应。实验结果表明此方法节省网络节点资源、避免网络的崩溃且达到主动响应隔离入侵节点的效果,有效地检测并阻止了入侵行为。     

一种基于误用检测的新算法

当今攻击网络的手段是多种多样的,为保护用户在访问网络资源时不受黑客的攻击,因此需要网络安全设备和网络安全技术。入侵检测技术是一种安全技术,该技术能够检测出网络中数据包的行为属性,是正常还是异常。目前入侵检测技术有两种：误用检测和异常检测。这两种技术都能够阻止网络攻击行为。但要想阻止网络的攻击行为,必须检测出攻击行为。文中在简述了入侵检测技术、粒子群的某些概念后,提出了基于粒子群技术在入侵检测中的应用,最后给出了数据包属性的匹配算法。     

基于移动代理和动态拓扑结构的入侵检测系统模型

分布式网络攻击的破坏性越来越大。网络在运行中拓扑结构又是在动态变化的。如何在拓扑结构变化的网络中去发现和阻止网络攻击，本文提出了一个基于移动代理技术的模型。模型由拓扑发现代理、拓扑计算代理、检测代理、追踪代理、阻击代理组成。拓扑发现代理和拓扑计算代理完成网络拓扑结构跟踪，检测代理、追踪代理、阻击代理完成对分布式网络攻击的探测、追踪、阻止。该模型具有适合大规模网络、占用网络带宽少、能自动跟踪网络拓扑变化、系统的入侵检测和响应与拓扑变化无关等特点。     

采用数据挖掘和代理技术的入侵检测系统研究

入侵检测系统是一种检测网络入侵行为并能够主动保护自己免受攻击的一种网络安全技术,是网络防火墙的合理补充.介绍了应用几种数据挖掘方法进行入侵检测的过程,并在此基础上提出了一个采用数据挖掘技术的基于代理的网络入侵检测系统模型.该模型由一定数量的代理组成,训练和检测过程完全不同与其它系统.由于代理的自学习能力,该系统具有自适应性和可扩展性.     

基于代理技术的入侵防御系统研究

入侵防御系统是最近网络安全技术领域一个重要研究方向。文章针对目前入侵检测系统是以被动方式工作这一弊端,分别引入了分布处理、自治代理以及陷阱技术等主动防御思想,提出了一个基于智能代理的分布式主动入侵防御系统,并给出了该系统的详细设计结构、试验平台以及数据分析。实验结果表明该系统具有实时、可伸缩、主动等优点,能有效发现并阻止多种入侵行为,可以解决传统入侵检测系统长期以来存在的问题。     

用智能代理进行网络安全管理的应用研究

主要介绍了网络安全管理中的一个关键问题———入侵检测 ,并提出了一种新的技术方法 ,即IA NSM(IntelligentAgentsforNetworkSecurityManagement)。它在网络环境中添加了多重代理系统 ,并使其成为一个灵活的有机整体 ,从而提高了系统阻止内部进攻的能力。     

一种基于移动代理和Snort的分布式入侵检测系统

提出一种基于主机和网络的分布式入侵检测系统,利用Snort作为网络信息收集器,产生网络MLSI;使用移动代理对MLSI进行融合分析,检测传统入侵检测系统不能检测到的入侵行为.对系统中各部件的功能作了说明,利用移动代理的移动性、自治性等特性来克服目前分布式入侵检测系统中存在的实时性差、灵活性有限和动态扩展能力不足的缺点.最后给出了一个检测doorknob攻击的实例.     

一种基于粒子群的入侵检测研究

当今攻击网络的手段是多种多样的,为保护网络的用户不受来自网络的攻击,网络在使用中需要安全设备和安全技术。入侵检测技术是一种安全检测技术,该技术能够来阻止网络攻击行为。但要阻止网络的攻击行为,必须检测到该行为。本文在简述了入侵检测技术,粒子群知识后,然后提出了粒子群在入侵检测技术上的应用。该技术在入侵检测上的应用将使得检测方法具有一定的智能性,将粒子群技术应用到入侵检测中属于是首次。本文提出的具有一定智能性检测算法可分为两个步骤：①首先通过函数y=f（x）判断链路中的数据流是否在正常范围内,还是属于异常。②然后如果某种数据流属于异常的流,则使用粒子群算法来对未知属性数据流的属性进行定性判断。本文提出的算法具有一定的智能性,能够作为现有的入侵检测算法的补充。     

基于多代理技术可自检的分布式入侵检测系统模型

通过对现有多代理技术的分布式入侵检测系统的研究,提出了一种基于多代理技术可自检的分布式入侵检测系统模型,并且对该模型的结构,组成和代理的处理流程进行了描述,该模型是一个开放的系统模型,具有很好的可扩展性,易于加入新的入侵检测代理及相应的自检,也易于增加新的入侵检测模式,代理之间的协同采用代理守护进程来实现.     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

View-based model-driven architecture for enhancing maintainability of data access services

In modern service-oriented architectures, database access is done by a special type of services, the so-called data access services (DAS). Though, particularly in data-intensive applications, using and developing DAS are very common today, the link between the DAS and their implementation, e.g. a layer of data access objects (DAOs) encapsulating the database queries, still is not sufficiently elaborated, yet. As a result, as the number of DAS grows, finding the desired DAS for reuse and/or associated documentation can become an impossible task. In this paper we focus on bridging this gap between the DAS and their implementation by presenting a view-based, model-driven data access architecture (VMDA) managing models of the DAS, DAOs and database queries in a queryable manner. Our models support tailored views of different stakeholders and are scalable with all types of DAS implementations. In this paper we show that our view-based and model driven architecture approach can enhance software development productivity and maintainability by improving DAS documentation. Moreover, our VMDA opens a wide range of applications such as evaluating DAS usage for DAS performance optimization. Furthermore, we provide tool support and illustrate the applicability of our VMDA in a large-scale case study. Finally, we quantitatively prove that our approach performs with acceptable response times.     

A pragmatic multi-method investigation of discrepant technological events: Coping,attributions, and ‘accidental’ learning

Discrepant technological events or situations that entail a problem, a misunderstanding or a difficulty with the Information Technology (IT) being employed, are common in the workplace, and can lead to frustration and avoidance behaviors. Little is known, however, about how individuals cope with these events. This paper examines these events by using a multi-method pragmatic approach informed by coping theory. The results of two studies – a critical incident study and an experiment – serve to build and test, respectively, a theoretical model that posits that individuals use a variety of strategies when dealing with these events: they experience negative emotions, make external attributions, and adopt engagement coping strategies directed at solving the event, eventually switching to a disengagement coping strategy when they feel they have no control over the situation. Furthermore, users’ efforts may result in ‘accidental’ learning as they try to overcome the discrepant IT events through engagement coping. The paper ends with a discussion of the results in light of existing literature, future opportunities for research, and implications for practice.     

Call for Papers The 6^th International Conference on Grid and Cooperative Computing

Recent years have seen rapid advances in various grid-related technologies, middleware, and applications. The GCC conference has become one of the largest scientific events worldwide in grid and cooperative computing. The 6th international conference on grid and cooperative computing (GCC2007) Sponsored by China Computer Federation (CCF),Institute of Computing Technology, Chinese Academy of Sciences (ICT) and Xinjiang University ,and in Cooperation with IEEE Computer Soceity ,is to be held from August 16 to 18, 2007 in Urumchi, Xinjiang, China.     

The Distributed Time-Triggered Simulation Scheme: Core Principles and Supporting Execution Engine

Distributed real-time simulation is a young technology field but its practice is under increasing demands. In recent years the author and his collaborators have been establishing a new approach called the distributed time-triggered simulation (DTS) scheme which is conceptually simple and easy to use but widely applicable. The concept was initiated in the course of developing a new-generation object-oriented real-time programming scheme called the time-triggered message-triggered object (TMO) programming scheme. Some fundamental issues inherent in distributed real-time simulation that were learned during recent experimental studies are discussed along with some approaches for resolving the issues. An execution engine developed to support both the TMOs engaged in control computation and the TMOs engaged in DTS is also discussed along with its possible extensions that will enable significantly larger-scale DTSs.     

Software-Konfigurationsmanagement in großen Softwareprojekten

Zusammenfassung Mit zunehmender Größe der Softwaresysteme verschärfen sich die für die Software-Herstellung typischen Probleme: Beherrschen großer Objektmengen, Erhalten der Systemkonsistenz, Kontrolle der ständigen Änderungseinflüsse und Gewährleisten einer langen Lebensdauer. Die Disziplin Konfigurationsmanagement bildet den methodischen Ansatz, diese Probleme besser zu beherrschen. Software-Konfigurationsmanagement faßt die Herstellung von Softwaresystemen als eine Abfolge von kontrollierten Änderungen an gesicherten Zwischen- und Endergebnissen auf. Dargestellt werden die Objekte und Funktionen des Software-Konfigurationsmanagements sowie die hierfür in großen Software-Projekten benötigten Methoden, Instanzen und Hilfsmittel.     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and     

Editorial:Brain-machine interface(BMI) and cyborg intelligence

正Brain-machine interfaces(BMIs)aim at building a direct communication pathway between the brain and an external device,and represent an area of research where significant progress has been made during the past decade.Based on BMIs,mind information can be read out by neural signals to control     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and overseas to the world’s scientific circles,especially to stimulate     

SCIENCE CHINA Information Sciences SUBJECT INDEX TO VOLUME 57(2014)

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