HTTP-flooding attack disables the victimized web server by sending a large number of HTTP Get requests.Recent research tends to detect HTTP-flooding with the anomaly-based approaches,which detect the HTTP-flooding by ...HTTP-flooding attack disables the victimized web server by sending a large number of HTTP Get requests.Recent research tends to detect HTTP-flooding with the anomaly-based approaches,which detect the HTTP-flooding by modeling the behavior of normal web surfers.However,most of the existing anomaly-based detection approaches usually cannot filter the web-crawling traces from unknown searching bots mixed in normal web browsing logs.These web-crawling traces can bias the base-line profile of anomaly-based schemes in their training phase,and further degrade their detection performance.This paper proposes a novel web-crawling tracestolerated method to build baseline profile,and designs a new anomaly-based HTTP-flooding detection scheme(abbr.HTTP-sCAN).The simulation results show that HTTP-sCAN is immune to the interferences of unknown webcrawling traces,and can detect all HTTPflooding attacks.展开更多
Weblogs, writing logs on the web, have been popularly used as an instructional tool to facilitate, reading and writing instructions in ESL （English as a Second Language）/EFL （English as a Foreign Language） classro...Weblogs, writing logs on the web, have been popularly used as an instructional tool to facilitate, reading and writing instructions in ESL （English as a Second Language）/EFL （English as a Foreign Language） classrooms. This study employed weblogs to support the writing process of Thai EFL students and provided an opportunity for them to participate in a Thai-Japanese weblog exchange project. The results showed that student bloggers： （1） enjoyed blogging due to their perceived reading and writing incentives, the exchange of cultural knowledge, and networking; and （2） employed the writing process to complete their written assignments. Findings suggest that weblogs can foster EFL learners＇ motivation, development of reading and writing skills, and development of cultural knowledge, and facilitate their writing process via cyberspace.展开更多
Web Log中文意思是“网络日志”，缩写为BLOG，而BLOGGER（博客）则是写BLOG的人。BLOG是继Email、BBS、QQ之后出现的一种网络交流方式，由于其沟通方式比电子邮件、讨论群组更简单和容易，而在互联网上快速扩张起来。其主要特征有：一...Web Log中文意思是“网络日志”，缩写为BLOG，而BLOGGER（博客）则是写BLOG的人。BLOG是继Email、BBS、QQ之后出现的一种网络交流方式，由于其沟通方式比电子邮件、讨论群组更简单和容易，而在互联网上快速扩张起来。其主要特征有：一个BLOG就是一个网页，它通常是由简短且经常更新的Post（张贴）所构成；这些张贴的文章都按照年份和日期排列；是基于某个特定主题的、个性化的知识管理系统；查找方便，可跨BLOG的检索，等等。展开更多
基金supported by National Key Basic Research Program of China(973 program)under Grant No.2012CB315905National Natural Science Foundation of China under grants 61172048,61100184,60932005 and 61201128the Fundamental Research Funds for the Central Universities under Grant No ZYGX2011J007
文摘HTTP-flooding attack disables the victimized web server by sending a large number of HTTP Get requests.Recent research tends to detect HTTP-flooding with the anomaly-based approaches,which detect the HTTP-flooding by modeling the behavior of normal web surfers.However,most of the existing anomaly-based detection approaches usually cannot filter the web-crawling traces from unknown searching bots mixed in normal web browsing logs.These web-crawling traces can bias the base-line profile of anomaly-based schemes in their training phase,and further degrade their detection performance.This paper proposes a novel web-crawling tracestolerated method to build baseline profile,and designs a new anomaly-based HTTP-flooding detection scheme(abbr.HTTP-sCAN).The simulation results show that HTTP-sCAN is immune to the interferences of unknown webcrawling traces,and can detect all HTTPflooding attacks.
文摘Weblogs, writing logs on the web, have been popularly used as an instructional tool to facilitate, reading and writing instructions in ESL （English as a Second Language）/EFL （English as a Foreign Language） classrooms. This study employed weblogs to support the writing process of Thai EFL students and provided an opportunity for them to participate in a Thai-Japanese weblog exchange project. The results showed that student bloggers： （1） enjoyed blogging due to their perceived reading and writing incentives, the exchange of cultural knowledge, and networking; and （2） employed the writing process to complete their written assignments. Findings suggest that weblogs can foster EFL learners＇ motivation, development of reading and writing skills, and development of cultural knowledge, and facilitate their writing process via cyberspace.
