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可信计算在VPN中的应用 总被引:1,自引:0,他引:1
对虚拟专用网VPN进行了研究。VPN使用户远程办公成为可能,但是VPN不能认证主机的配置,入侵者通过有VPN访问权限的主机获得非法的访问权限,使得终端不安全,同时相应的使网络接入也不安全。可以利用可信计算技术解决这些问题,其中可信平台模块通过绑定密钥认证VPN完整性,而可信网络连接认证网络连接安全性,以确保终端、网络接入和通信的安全可信。 相似文献
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基于IPSec协议的移动VPN系统为移动终端的远程接入提供了可行的解决方案,但IPSec协议的普通身份认证没有考虑移动终端系统的完整性和可信性,造成终端安全漏洞,给被接入系统和被访问信息带来安全隐患.针对这个问题,提出支持可信认证的移动IPSec VPN系统,并给出其系统架构和关键技术.该系统在实现了普通IPSec VPN系统的安全功能之外,增加了多因子与可信证明相结合的复合认证功能、基于信任的动态访问控制功能.并对其进行了原型实现和性能测试及分析,表明了在将时间代价合理控制的前提下,该系统有效确保了终端的可信接入、通信信道中数据传输的安全可靠以及被接入网络的资源安全及应用服务的可用性和可管控性. 相似文献
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TNC架构在终端接入网络前对终端的平台身份和平台环境进行可信认证,保证了接入终端的可信,但这种可信认证存在单向性的局限,无法保证网络服务器的可信。EAP-TLS是802.1x中一种基于证书的扩展认证协议,支持双向认证机制。本文在分析TNC架构和EAP-TLS双向认证机制基础上,设计了一种基于EAP-TLS的可信网络连接双向认证方案,该方案能够对终端和服务器的平台身份、平台完整性和平台可信环境进行双向认证。在FHH@TNC开源架构搭建的可信网络环境上实现了客户端与服务器之间双向可信认证方案,并进行了方案测试,证明了方案的正确性。 相似文献
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不同网络同时维护多套认证设施会大幅降低异构融合网络的接入效率,传统接入认证方法中的短板效应也会降低融合网络中的安全性能,为此在异构融合通信网络环境下,提出可信接入安全认证方法.以安全认证过程的信息流走向为依据,搭建网络可信接入安全认证模型,在认证模型下,从信道、网络容量和网络服务质量三个方面,设定通信网络的允许接入条件.通过用户位置预测、用户身份隐替标识和用户签名认证三个步骤实现用户身份的认证,设立安全认证密钥分配协议作为统一用户标识的认证方案.仿真测试结果表明,可信接入安全认证方法的平均安全系数为98.5%,相比于传统的认证方法安全性提高了 7%,说明上述方法可以实现网络的安全可信接入,保障用户的安全性. 相似文献
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周意良 《电脑编程技巧与维护》2012,(10):102-104
通过对网络访问隔离控制技术的研究,结合ISA2006的访问控制技术在Windows Server VPN提供的普通用户帐户认证的基础上,成功开发了客户端硬件特征的辅助认证,通过这种组合认证提高了VPN客户端的安全性。 相似文献
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S. Shaw 《Journal of Computer Assisted Learning》1993,9(2):93-99
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
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European Community policy and the market 总被引:1,自引:0,他引:1
C. Lloyd 《Journal of Computer Assisted Learning》1993,9(2):86-91
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
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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
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张涛 《计算机测量与控制》2015,23(1):86-89
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
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Wayne O’Brien Author Vitae 《Journal of Systems and Software》2008,81(11):1997-2013
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
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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
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潘丽 《自动化与仪器仪表》2014,(7):80-82
自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。 相似文献
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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
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Jacob Palme 《Software》1979,9(9):741-747
The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users. 相似文献