一种Web服务器安全机制的实现方法

针对Web网站点的入侵事件不断发生,现有的防火墙、IDS等设备都不能有效防止入侵者篡改网站中的网页、盗取重要信息等攻击,提出了Web服务器安全较完备机制,从核心层保证Web站点中的网页不会被黑客篡改,恶意代码在系统中不会肆意发作。该机制重构了操作系统核心层权限访问控制模型,对操作系统文件、注册表、进程和网络等资源采用白名单规则,并采用多机制相结合的方式提高Web服务器的抗攻击能力。     

基于反向代理技术的Web防火墙

工作于应用层的代理防火墙可以针对应用协议对网络传输的内容进行监测分析。对Web服务系统流程以及HTTP协议进行分析,在Web服务器和客户端之间加入代理防火墙,防火墙获取服务器与客户端之间传输的数据,并对数据内容进行检查过滤,防止了非法内容的传输,并通过文件水印技术检测用户请求的文件是否被篡改,如果文件被篡改则将数据丢弃,再通过保存的原始文件将被篡改的文件恢复,保证用户访问到的都是正确的文件。     

基于本地快照和Rsync算法的Web文件保护

针对网页被篡改后的访问保护和快速恢复问题,以分布式网页防篡改系统的备份恢复为背景,提出一种基于本地快照和Rsync同步的Web文件保护方法.当Web页面被篡改时,Web服务器通过快照技术将原Web页面的映像发送给用户浏览,使得系统完好无损,进一步调用Rsync算法从备份服务器上同步Web文件,从而实现恢复.实验结果表明,该方法可保护被篡改页面不被访问,具备较好的快速恢复性能.     

捷普网络脆弱性智能评估系统

Web的开放性广受大家的欢迎,与此同时,Web系统将面临着形形色色入侵攻击的威胁,针对Web应用安全漏洞的攻击也在逐渐成为主流的攻击方式。利用网站操作系统的漏洞和Web服务程序的SQL注入漏洞等,黑客能够得到Web服务器的控制权限,从而轻易篡改网页内容或者窃取重要内部数据,甚至在网页中植入恶意代码（俗称“网页挂马”）,使得更多网站访问者受到侵害。     

iGuard网页防篡改系统为政府网站保驾

针对近年来各国政府和门户网站的篡改性攻击有增无减的情况，上海天存信息技术有限公司研发生产了iGuard网页防篡改系统，目前已成为国内领先和成熟的网页防篡改软件。iGuard网页防篡改系统以国家863项目先进技术为基础，使用严密的Web服务器核心内嵌技术，使得每一网页在被阅读前都进行水印检测，从而确保网站所有被阅读的网页都不被篡改。     

一种分布式网站安全防护系统

为了及时、高效地阻止黑客对网页文件的篡改,并对被篡改的页面文件进行及时修复还原,提出了一种分布式"过滤驱动技术+事件触发技术+核心内嵌技术"架构的网站安全防护系统。事件触发技术负责自动实时监测,若有网页被篡改,通过过滤驱动技术和核心内嵌技术立即删除被篡改网页,停止Web服务。与传统的网页防篡改产品相比,系统可以对网页的非法篡改做出更为敏捷快速的反应,对系统资源占用更少。同时兼容其他安全产品,形成深度防护体系,最大限度地保障受保护网站的安全。     

基于环结构技术的Web防篡改系统研究

传统的Web防篡改系统安装于受保护服务器中,无自身安全保护措施。为减少网站页面被篡改,确保Web页面的完整性和防篡改系统自身的安全,借鉴令牌环工作原理,在已有防篡改技术的基础上提出环形网页防篡改模型,模型中引入了三线程和轮询环双重保护技术,解决了防篡改系统自身的安全问题。详细描述了系统的设计方法、工作机制及实现过程。实验证明,该系统能有效自御,在网站安全性得到保障的同时不影响服务器的工作效率。     

基于Jetty的网页防篡改技术的设计和实现

本文提出并实现了架设在符合J2EE标准的Web服务器上的网页防篡改系统,该系统主要采用Java语言开发和实现,能够对目前各种主流操作系统平台上的网页内容进行实时监控,发现网页被篡改时能及时恢复并报警,有效的保护目标网站的安全。     

捷普WEB安全建设方案

0前言 近年来．网站安全问题越来越复杂．Web服务器以其强大的计算能力、处理性能及所蕴含的高价值逐渐成为主要攻击的目标．特别是涉及到支付交易等平台．更容易成为攻击的目标。针对网站的各类安全威胁正在飞速增长．如DDoS攻击（分布式拒绝服务攻击）、缓冲区溢出攻击,恶意远程文件执行、目录遍历攻击以及当前新兴的SQL注入和跨站脚本攻击。本质上,这些攻击手段都是充分利用了各类安全漏洞,如TCP／IP协议设计存在的安全隐患．系统漏洞以及Web应用程序漏洞以及配置错误。采用这些攻击手段,攻击者可以实现拒绝服务网页篡改或是网页挂马．网站将蒙受巨大的经济损失或政治影响。     

攻防结构中发现安全隐患 网络安全工程师技能培训

想要掌握本文知识,你需要了解:1 1.什么是WebShell WebShell件Web入侵的脚本攻击工具.简单的说来,WebShell就是一个ASP或PHP木马后门,黑客在入侵了一个网站后,常常在将这些ASP或PHP木马后门文件放置在网站服务器的Web目录中,与正常的网页文件混在—起。然后黑客就可以用Web的方式,通过ASP或PHP木马后门控制网站服务器,包括上传下载文件、查看数据库、执行任意程序命令等。     

Only connect: teaching, technology and telesis

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.     

European Community policy and the market

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.     

一种自适应子融合集成多分类器方法

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。     

Avoiding semantic and temporal gaps in developing software intensive systems

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.     

Designing economic np control charts: A programmed simulation approach

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.     

The development of robot art

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     

Explanation and prediction: an architecture for default and abductive reasoning

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.     

Three Process Perspectives: Organizations, Teams, and People

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.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。     

How do children do mathematics with LOGO?

Abstract  This paper considers some results of a study designed to investigate the kinds of mathematical activity undertaken by children (aged between 8 and 11) as they learned to program in LOGO. A model of learning modes is proposed, which attempts to describe the ways in which children used and acquired understanding of the programming/mathematical concepts involved. The remainder of the paper is concerned with discussing the validity and limitations of the model, and its implications for further research and curriculum development.