黑客攻击方式的四种最新趋势

从1988年开始,位于美国卡内基梅隆大学的CERT/CC(计算机紧急响应小组协调中心)就开始调查网络入侵者的活动。近日,CERT/CC公布了一些关于最新入侵者攻击方武的趋势的调查报告。     

有目的在线窃取成为网络攻击主流

国家计算机网络应急技术处理协调中心(CNCERT/CC)报告,2006年上半年中国公共互联网安全状况呈三大特点:攻击组织严密化、攻击行为趋利化和攻击目标直接化。     

应对高校网站五大安全漏洞

常见的校园网络安全问题主要有SQL注入攻击、XSS注入攻击、上传漏洞、网站后台安全以及CC攻击等形式,本文针对每一类安全问题提出了详细的安全防护技术手段。目前校园网网站安全面临着严峻的安全挑战,如何保证其安全运行成为了校园网管理的重要环节。本文总结了攻击者利     

基于自动生成攻击树的攻击模型研究

提出一种自动生成攻击树的攻击模型。首先给出模型框架,着重阐述自动生成攻击树算法,然后定义攻击场景完成攻击模型的实验室模拟测试。在测试中,充分考虑到安全工作人员的技术评估,保证了整个攻击过程可以被实时监控。经实验结果表明,提出的模型能自动生成攻击树,极大地提高了攻击树生成效率,丰富了攻击场景,扩展了攻击过程研究的广度和深度。     

智能和安全一个都不能少——港湾安全策略在智能网络中的部署

据美国CERT/CC数据,2004年收到的安全事件报告已达20多万,是1999年9000件的20多倍,并且攻击手段已经由单一的黑客攻击或病毒攻击演变为混合型攻击,红色代码、冲击波、SQLSlammer都是混合型攻击的典型代表。这些攻击广泛分布在Internet上和企业网络内部,攻击源可能来自于外部,也可能来自内部,这使得网络安全策略的部署变得更加复杂。业务应用的不断发展已经成为智能网络的源动力,智能安全也已经成为智能网络的一部分。港湾提供的智能安全策略部署,能够在最大限度上解决智能网络面临的安全挑战。天清汉马捍卫网络出口网络出口位置是最关…     

远程控制与自动攻击系统设计思路

分析了目前远程控制和木马攻击的主要方法,叙述了远程控制与自动攻击系统的设计思路,将整个系统分成控制端和受控端两个主要部分进行分析,在实现部分对控制程序的驻留方法和程序自我保护方面进行了研究,并提出了可行方案。     

补丁带来新的风险

卡内基.梅隆大学的计算机科学家David Brumley等人最近发明了一种利用补丁自动生成攻击的技术,这种技术可以自动地比较有漏洞的程序和打了补丁后的程序,从而发现漏洞的所在并生成攻击代码,研究者将这种技术命名为基于补丁的自动攻击生成技术（automatic patch-based exploit generation, APEG）。     

Shadowserver：捕捉潜藏的僵尸网络

暗影服务器基金会（Shadowserver Foundation,后文简称ShadowServer）是一个研究如何对抗僵尸网络的组织。僵尸网络（botnet）是攻击者出于恶意目的,传播僵尸程序控制大量主机,并通过一对多的命令与控制信道所组成的网络,可以被利用发起拒绝服务（DDoS）攻击、发送垃圾邮件、传播恶意代码,是目前网络攻击的基本手段和资源平台。根据2007年CNCERT／CC抽样监测结果,     

国民党“CC”系之探微——兼析“CC”系与陈氏兄弟的关系

"CC"源于国民党中央俱乐部的英文名简称,后有人为讽刺陈果夫、陈立夫兄弟长期把持国民党党部大权,用"CC"代指陈氏兄弟,以"CC"系代指陈氏兄弟在国民党内所建立的政治势力。在搜集整理大量"CC"系相关的重要档案、文献史料的基础上,结合前人的研究成果,以求廓清"CC"系的来源、形成时间、兴衰,以及与陈氏兄弟的关系。     

基于扩展角分类神经网络的文档分类方法

CC4神经网络是一种三层前馈网络的新型角分类（corner classification)训练算法，原用于元搜索引擎Anvish的档分类。当各档之间的规模接近时，CC4神经网络有较好的分类效果，然而当之间规模差别较大时，其分类性能较差。针对这一问题，本意图扩展原始CC4神经网络，达到对档有效分类的效果。为此，提出了一种基于MDS－NN的数据索引方法，将每一档映射至k维空间数据点，并尽可能地保持原始档之间的距离信息，其次，通过将索引信息变换为CC4神经 网络接受的0，1序列，实现对CC4神经网络的扩展，使其能够接受索引信息作为输入，实验结果表明对相互之间规模差别较大的档，扩展CC4神经网络的性能优于原始CC4神经网络的性能。同时，扩展CC4神经网络的分类精度与档索引方法有密切关系。     

再论国民党对商会的整顿改组

国民党在推行商民运动之初,即已确立以商民协会取代商会的策略,因而南京国民政府建立后对商会进行整顿改组,并非完全是国民党为实现一党专制而制定的新策略,而是国民党成为执政党之后不断调整商民运动方略,实施由“破坏”转为“建设”这一新政策的结果。国民党从最初确立取消商会的策略,转而承认商会与商民协会并存,到最终决定取消商民协会,允许商会经过整顿改组得以继续保存,使商会免除了被解散取消的厄运,这对自商民运动开展后即一直争取合法生存权的商会而言,在某种程度上可以说基本达到了预期的斗争目的。     

Relationships between different instructional approaches and students' Classical Chinese reading comprehension and motivation

Previous studies comparing teacher‐centred (TC) and learner‐centred (LC) instruction have presented a mixed picture of the effectiveness of these two instructional approaches. By examining the effectiveness of different types of instruction on students' Classical Chinese (CC) reading comprehension and motivation, this study aims to contribute to instructional research by elucidating the positive and negative aspects of TC and LC instruction when they are applied in the context of teaching CC reading. A total of 454 Secondary 4 students between the ages of 15 and 17 years agreed to participate in this study on a voluntary basis. They completed a CC reading comprehension test and a questionnaire that measured their CC reading motivation and perceived CC reading instruction. Relationships between students' perceived CC reading instruction, reading motivation and reading comprehension were examined by correlation and path analyses. The findings of the correlation analyses indicated that traditional TC instruction positively and significantly correlated with students' CC reading performance and extrinsic motivation. Motivating tasks, one type of LC instruction, positively and significantly correlated with all types of motivation but did not significantly correlate with CC reading performance. In the path analysis, TC instruction exhibited a significant positive effect on reading comprehension, whereas motivating tasks continued to exhibit a significant positive effect on intrinsic motivation after the effect of the examined schools' achievement level was controlled for. The findings highlight the essential role of teachers in instructing students who are weak in particular subjects. Instead of viewing TC and LC instruction as two contradictory approaches, the findings indicate that a combined approach of TC and LC instruction can more effectively facilitate students' learning in a difficult school subject.     

《CC2001教程》研究与思考

本文介绍了最新版CC2001教程产生的过程，它所包含的计算学科的内涵、CC2001教程体系和教程模式以及由此带来的对我国计算机专业教育改革的思考。     

Classical Chinese reading instruction: Current practices and their relationship with students' strategy use and reading motivation

The study examined current practices in Classical Chinese (CC) reading instruction in Hong Kong and the relationship between different instructional practices and students' strategy use and motivation in CC reading. A total of 519 secondary students voluntarily responded to a questionnaire that measured their perception of CC reading instruction, strategy use, and motivation. The findings indicate while teachers frequently teach both the language and content aspects of CC reading, the teacher-centered approach they are now adopting is ineffective in facilitating students' CC reading development. Relations between different instructional approaches and students’ strategy use and motivation in CC reading are discussed.     

Why Are Partnerships Necessary for Computer Classroom Administration?

Computer classrooms (CCs) have been an important part of writing instruction since the mid 1980s, yet little scholarship concerns the roles that directors of computer classrooms play in maintaining these facilities. Based on a review of scholarship of CC administration and an informal survey of CC administrators, this article argues that CC directors walk a tightrope between the role of teacher and manager and that we need to focus on building partnerships to maintain our facilities, because we simply cannot do by ourselves everything that this complex role requires of us.     

Why Are Partnerships Necessary for Computer Classroom Administration?

Computer classrooms (CCs) have been an important part of writing instruction since the mid 1980s, yet little scholarship concerns the roles that directors of computer classrooms play in maintaining these facilities. Based on a review of scholarship of CC administration and an informal survey of CC administrators, this article argues that CC directors walk a tightrope between the role of teacher and manager and that we need to focus on building partnerships to maintain our facilities, because we simply cannot do by ourselves everything that this complex role requires of us.     

The demand for community college education

This article describes a model of Community College (CC) enrollment which is tested using cross-sectional data for the 1969–1970 academic year. The sample consists of 126 relatively homogeneous CCs divided into sixty-two separate markets. Tuition, income, proximity of four-year schools, and the age of a CC are found to have significant influences on enrollment.An estimate is made of the marginal cost to a CC of attracting more students by lowering tuition.     

《CC2005教程》的分析与思考

介绍了CC2005中计算机学科体系的构成,分析并比较了五个专业的教学重点,探讨了CC2005对我国计算学科相关专业本科人才培养的启示。     

英语教师话语与大学生交际能力的培养

英语教师的课堂言语行为直接影响着学生的语言感知力,并对学生的外语学习有着非常重要的示范作用。随着大学英语教学改革的开展,教师话语（teachertalk）对英语教学,特别是对学生外语交际能力的培养方面所具有的影响已成为一个亟需关注的课题。     

量子密码的安全性研究

量子密码的安全性是基于量子原理正确性的基础上的,因而是物理上安全的密码.但是窃听者可以在不违反物理原理的基础上对量子密码的产生过程进行攻击.本文将详细介绍量子密码过程当中窃听者的攻击手段,其中包括单独攻击、集体攻击、角色扮演攻击、光子数劈裂攻击.