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1.
基于人工神经网络的方法对主机安全性能进行量化评估。分析了BP人工神经网络模型的网络结构及学习算法,分析了影响目标主机安全性能的可能因素,并应用BP神经网络模型对目标主机的安全性能进行样本训练及实际测试。基于人工神经网络的主机安全量化评估为评价目标主机的安全性能提供了可行的方法。  相似文献   

2.
夏阳  陆余良 《计算机科学》2007,34(10):74-79
在计算机网络安全领域,针对计算机主机及网络的脆弱性量化评估是目前的研究热点。本文提出了一种网络脆弱性量化评估方法,并在该评估方法的基础上开发出了相应的评估系统。系统通过对主机漏洞存在可能性以及漏洞利用可能性进行量化评估,得到目标主机的脆弱性度量值。在此基础上,结合网络拓扑结构,利用优化的最短路径算法,分析网络中存在的危险路径和关键结点,从而可以有针对性地进行网络脆弱性修补,增强网络的总体安全性能。  相似文献   

3.
本文提出了多传感器网络信息数据融合技术。通过多传感器探测节点向目标主机发送探测信息,并将返回信息输入到经过大量产生式规则训练和学习的BP神经网络中,得到目标主机属性信息。然后,通过D-S证据推理对属性信息进行信任度融合处理,得到目标主机上可能存在的漏洞分布及漏洞存在的可能性,为进一步的主机安全性能评估打下基础。  相似文献   

4.
层次分析法在目标主机安全量化融合中的应用   总被引:7,自引:1,他引:7  
陆余良  夏阳 《计算机工程》2003,29(22):141-143,160
在计算机网络安全领域,针对目标主机的安全性能分析评估是当前的研究热点。该文从分析影响目标主机安全性能的因素入手,运用层次分析法,确定安全评价指标,构建目标主机安全性能评价层次结构模型,为评价目标主机的安全性能提供了可行的方法。  相似文献   

5.
无线局域网安全量化评估方法与系统设计研究   总被引:2,自引:0,他引:2  
马涛  单洪 《计算机应用》2008,28(2):412-414,
无线网络的飞速发展使得网络安全的量化评估日益重要。从非授权接入的角度出发,建立了802.11b无线局域网试验环境和安全评估模型,对无线局域网的安全量化评估进行了深入分析。把无线局域网的安全量化评估分为两个部分:非授权接入后的网络入侵程度评估和在此基础上对整个网内主机安全性能的评估,给出了量化评估的方法和步骤,并介绍了系统实现流程。最后通过实例进行了安全量化评估分析验证。  相似文献   

6.
提出了融合网络安全信息的网络安全态势评估模型,该模型对多源安全设备的告警信息和主机系统日志进行校验、聚集融合,从而整体上降低安全设备的误报率,然后综合告警信息威胁量化结果和网络中漏洞的脆弱性量化结果两部分信息,对网络安全进行态势量化评估。经实验证实该模型能够比较准确的反映网络安全运行态势。  相似文献   

7.
基于集对分析的网络安全态势评估   总被引:2,自引:0,他引:2  
韩敏娜  刘渊  陈烨 《计算机应用研究》2012,29(10):3824-3827
为方便管理员更为直观地观察网络安全状况以便迅速作出应变措施,提出了基于集对分析的网络安全态势评估模型。首先对各个传感器的数据进行预处理,得到服务器和攻击的规范化数据,然后利用集对分析理论融合来自多个传感器的数据得到主机的安全态势,最后采用自下而上的层次化安全态势量化评估模型,以评估网络的整体态势。通过对DARPA 2000数据集的分析,证明集对分析比传统方法更能够对网络态势所处的级别进行明确划分,更好地得出整个网络简单的安全态势。  相似文献   

8.
层次化网络安全威胁态势量化评估方法   总被引:111,自引:2,他引:111  
安全评估是贯穿信息系统生命周期的重要管理手段,是制定和调整安全策略的基础和前提.只有充分识别系统安全风险,才能有针对性地采取有效的安全防范措施.基于IDS(intrusion detection system)海量报警信息和网络性能指标,结合服务、主机本身的重要性及网络系统的组织结构,提出采用自下而上、先局部后整体评估策略的层次化安全威胁态势量化评估模型及其相应的计算方法.该方法在报警发生频率、报警严重性及其网络带宽耗用率的统计基础上,对服务、主机本身的重要性因子进行加权,计算服务、主机以及整个网络系统的威胁指数,进而评估分析安全威胁态势.实验表明,该系统减轻了管理员繁重的报警数据分析任务,能够提供服务、主机和网络系统3个层次的直观安全威胁态势,使其对系统的安全威胁状况有宏观的了解.而且,可以从安全态势曲线中发现安全规律,以便调整系统安全策略,更好地提高系统安全性能,为指导安全工程实践、设计相应安全风险评估和管理工具提供了有价值的模型和算法.  相似文献   

9.
一种主机和网络相结合的安全评估系统   总被引:1,自引:0,他引:1  
提出了一种主机和网络相结合的安全评估系统模型,讨论了安全评估系统中的关键技术及其原理,并分析了评估系统所采用的控制台/代理的体系结构。最后给出了安全评估的一种模糊数学综合评价方法,可以对目标安全状况进行分析评估。  相似文献   

10.
基于多元数据融合和层次分析的评估模型   总被引:2,自引:0,他引:2       下载免费PDF全文
为解决现有主机安全扫描项不全,定量评估不足的问题,将定性和定量分析用于主机评估,提出基于多元数据融合和层次分析的评估模型。采用专家打分方法构造两两比较判断矩阵,结合一致性校验,从11个方面36项全面扫描并评估系统。应用于FoundLight主机安全评估系统中的结果表明,该系统功能齐全、性能稳定、操作简便。  相似文献   

11.
Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.  相似文献   

12.
European Community policy and the market   总被引:1,自引:0,他引:1  
Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.  相似文献   

13.
融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。  相似文献   

14.
Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.  相似文献   

15.
This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.  相似文献   

16.
Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008  相似文献   

17.
Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.  相似文献   

18.
《计算机科学》2007,34(4):148-148
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.  相似文献   

19.
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.  相似文献   

20.
This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)SM and Team Software Process (TSP){SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.  相似文献   

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