共查询到20条相似文献，搜索用时 78 毫秒
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本文阐述了蜜罐技术的主动防御的优势,对蠕虫实现欺骗和诱导,收集新型病毒特征,检测蠕虫的变种,自动检测和预防新型蠕虫的爆发与传播,最终有效弥补入侵检测系统对未知蠕虫攻击的识别问题。本文所设计的基于蜜罐技术的蠕虫检测系统极大程度地提升了网络安全性。 相似文献
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蠕虫已成为全球网络最严重的安全威胁,但由于其有别于其他攻击方法的特点,现有的网络防御方法对蠕虫的攻击显得无能为力。针对传统防御方法在防御蠕虫入侵方面的不足,在针对网络蠕虫攻击特点的基础上,提出一个新的分布式入侵检测框架,来尽早发现蠕虫的踪迹,并立即进行防御。此框架不仅能够实时检测未知类型的网络蠕虫攻击,还能分析蠕虫攻击中扫描过程的网络传输特征和在网络内可能感染的主机列表。基于框架原型系统对CodeRed II蠕虫攻击检测得到的实验结果,证明该框架对蠕虫的早期扫描行为更加敏感,并具有更低的误报率。 相似文献
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李镇伟 《河北职业技术学院学报》2008,8(5)
由于蠕虫病毒具有极快的传播速度和巨大的破坏能力,每次爆发都严重扰乱了人们对计算机与网络的正常使用.通过分析网络蠕虫病毒的危害及其传播特征,设计了基于honeyd的未知蠕虫检测与预警插件,该插件可集成到honeyd系统中,部署到网络上进行未知蠕虫的检测与预警. 相似文献
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李镇伟 《廊坊师范学院学报(自然科学版)》2008,8(5):39-40
由于蠕虫病毒具有极快的传播速度知巨大的破坏能力,每次爆发都严重扰乱了人们对计算机与网络的正常使用。通过分析网络蠕虫病毒的危害及其传播特征,设计了基于honeyd的未知蠕虫检测与预警插件,该插件可集成到honeyd系统中,部署到网络上进行未知蠕虫的检测与预警。 相似文献
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周翰逊 《沈阳教育学院学报》2006,8(2):144-145
首先阐述了本系统用到的基于ICMP的蠕虫检测方法以及相同通讯模式的蠕虫检测方法，然后介绍了本系统的结构模型，最后介绍了该系统的三个主要组成部分。 相似文献
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针对人脸检测中的非线性和降维问题提出了一种有效的人脸检测方法。首先基于人脸的肤色和几何特征．通过局部自适应门限方法提取图象边缘，用几何规则和颜色特征筛选出候选眼睛块。然后采用改进的四边界sobel算子对眼睛精确定位。最后使用训练好的支撑向量机来验证。该方法可以实现多尺度多角度的彩色图像中的正面人脸检测，实验结果令人满意。 相似文献
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Internet蠕虫的频繁爆发带来了巨大的经济损失，已有的防病毒技术对蠕虫并不适用．本文从蠕虫的定义、行为特征、传播模型几方面对Internet蠕虫进行分析，阐述了蠕虫与计算机病毒的区别，介绍了几项防治措施． 相似文献
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祝春美 《济南职业学院学报》2009,(1)
网络蠕虫融合了病毒、木马、DDOS攻击等多种攻击技术,网络蠕虫能利用系统漏洞自动传播,造成网络拥塞,具有极大的破坏性.本文分析了蠕虫病毒的工作机制,分析了现有入侵检测技术优点及其不足针对蠕虫工作机制的扫描特征,提出了利用蜜网检测捕获蠕虫的技术.测试结果表明,蜜网具有扫描预警、检测扫描和未知攻击的能力,误报率和漏报率都很低. 相似文献
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罗艳萍 《读与写:教育教学刊》2008,5(6)
The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity. 相似文献
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Richard Denner 《海外英语》2007,(4):14-15
Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose. 相似文献
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邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
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Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F. 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
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陈美曦 《山东教育学院学报》2008,23(2):103-107
Different nations have different social cultures, and the social culture of every nation is developing with the development of the nation, language is greatly influenced by social culture, which enables language to possess national and historical characteristics. Word is the smallest, independent, meaningful linguistic unit of language. It can well reflect the national and historical characteristics. From synchronic aspect, the social and cultural influence on word meaning is mainly embodied in conceptual and associative meanings of word. The incorrespondence of word meaning is a phenomenon that exists in both conceptual and associative meanings of word among different languages. From diachronic aspect, the development of social culture causes some changes of word meaning to some extent. Therefore, social culture plays a key role in vocabulary learning and mastery of a language. 相似文献
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Rachel Zupek 《海外英语》2007,(11):40-41
我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了 相似文献
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YANGShiguo 《重庆大学学报(英文版)》2004,3(1):86-88
The problem on the geometrc inequalities involving an n-dimensional simplex and its inscribed simplex is studied. Aninequality is established, which reveals that the difference between the squared circumradius of the n-dimensional simplex andthe squared distance between its circumcenter and barycenter times the squared circumradius of its inscribed simplex is not lessthan the 2(n-1)th power of n times its squared inradius, and is equal to when the simplex is regular and its inscribed siplex is atangent point one. Deduction from this inequality reaches a generalization of n-dimensional Euler inequality indicating that thecircumradius of the simplex is not less than the n-fold inradius. Another inequality is derived to present the relationship betweenthe circumradius of the n-dimensional simplex and the circumradius and inradius of its pedal simplex. 相似文献