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Student Number 90522012
Author Liao-Shuang Kuo(郭廖軒)
Author's Email Address No Public.
Statistics This thesis had been viewed 2189 times. Download 1022 times.
Department Computer Science and Information Engineering
Year 2002
Semester 2
Degree Master
Type of Document Master's Thesis
Language zh-TW.Big5 Chinese
Title A DNS Based Pornographic Web Sites Filtering System
Date of Defense 2003-06-30
Page Count 62
Keyword
  • domain name system
  • information filtering
  • proxy server
  • Abstract With the popularity of WWW, fast information distribution greatly speed up the aggregation of knowledge. However, a variety of information on Web pages produces an unexpected problem-abusing information distribution, such as adult and violence. The article addresses how to find out adult contents on Internet and to avoid accessing them by a scalable simple approach. Considering the operation of TANet, we propose DNS-based with proxy approaches to filter abusing information. The approaches utilize existing domain name software as a special server. There is no extra load on the filtering system. Also, because of DNS’s cache mechanism, filtering system can make faster blocking decision.
    Pornographic web sites appear and disappear everyday, so it is hard to keep the blocking list up-to-date. We use the pornographic web sites’ feature to propose three kinds of update blocking list methods. The first one is ”Monitor DNS traffic analysis”. Some web sites with keywords in their hostnames is the principle. Besides, the pornographic web sites always link each other. So, we proposed the second method - ”Pornographic network group links analysis”. These methods have higher precision over than 90%. And they have less processing time. Now, we have collected more than 100,000 web sites.
    Finally, we implemented a prototype to demonstrate our approaches. The system was installed at National Central University in Taoyuan to test its effect. The experiment shows that our system effectively blocks the retrieval to abusing information. Because of the great effect, many other institutions joint to our system and inform us to adopt the system.
    Table of Content 摘要ii
    Abstractiii
    目錄iv
    圖目錄vi
    表目錄vii
    第1章 緒論1
    第2章 不當資訊的防治策略5
    2.1收集可疑的不當資訊5
    2.2分析判斷不當資訊6
    2.2-1影像分析7
    2.2-2文字分析7
    2.2-3 PICS (Platform for Internet Content Selection ) 標籤12
    2.2-4影像分析與文字分析綜合比較13
    2.3攔阻策略15
    2.3-1黑名單阻擋 (Blocking List)16
    2.4攔阻點的配置17
    2.5過濾方法相關學術研究18
    第3章 系統設計22
    3.1過濾系統架構設計22
    3.2問題討論28
    3.3 可擴充性架構29
    3.4黑名單更新設計29
    第4章 系統實作及測試36
    4.1過濾系統實作36
    4.2過濾系統評估與討論39
    4.3更新黑名單方法實作與評估42
    4.3-1 DNS traffic monitor方法實作與結果評估42
    4.3-2 Pornographic network groups similarity方法實作與結果評估45
    4.4更新黑名單方法試結果討論48
    第5章 結論及未來工作50
    5.1結論50
    5.2未來工作51
    參考文獻52
    Reference [1]http://dir.salon.com/sex/world/2000/06/19/nasa/index.html
    [2]http://ir.csie.ncku.edu.tw/Project/researchAchievement3.htm
    [3]http://www.w3.org/PICS/
    [4]Calamaris, http://cord.de/tools/squid/calamaris/Welcome.html.en
    [5]Dr. Pornographic Image GateLocker
    [6]IMira Screening, http://www.ulead.com.tw/es/imscreening/runme.htm
    [7]Microsystems Software, ”CyberPatrol”, http://www.microsys.com/cyber/default.htm
    [8]NoPorn, http://www.noporn.com.tw/
    [9]Recreational Software Advisory Council, http://www.rsac.org
    [10]SafeSurf, http://www.safesurf.com/.
    [11]Solid Oak Software, ”CyberSitter”, http://www.solidoak.com/cybersit.htm
    [12]Squid, http://www.squid-cache.org
    [13]SquidGuard, http://www.squidguard.org/
    [14]PORNsweeper, http://www.mimesweeper.com/products/msw/pornsweeper/
    [15]Marchiori A., Brodley C., Dy J., Pavlopoulou C., Kak A., Broderick L., Aisen A.M., ”CBIR for medical images - an evaluation trial ,” IEEE Workshop on Content-Based Access of Image and Video Libraries, pp.89-93, 2001
    [16]I. Anagnostopoulos, G. Kouzas, C. Anagnostopoulos, D. Vergados, I. Papaleonidopoulos, A. Generalis, V. Loumos and E. Kayafas, ”Automatic web site classification in a large repository under information filtering and retrieval techniques,” Electrotechnical Conference of 11th Mediterranean, pp. 279 -283, 2002.
    [17]Wayne B. Salamonsen, Roland Yeo, ”PICS-Aware Proxy System Versus Proxy Server Filters,” Proceedings of INET’97 on Internet Society
    [18]Chen Ding, Chi-Hung Chi, Jing Deng, Chun-Lei Dong, ”Centralized content-based Web filtering and blocking: how far can it go?, ”Proceedings of IEEE SMC 99’ Conference, Volume: 17, pp. 48 -57,2002
    [19]Feng Jiao, Wen Gao, Lijuan Duan and Guoqin Cui, ”Detecting adult image using multiple features, ”Proceedings of International Conferences on Info-tech and Info-net, Volume: 3, pp378-383, 2001.
    [20]Pieper J., Srinivasan S., Dom B., ” Streaming-media knowledge discovery,” Computer, Vol. 34, pp.68-74, 2001
    [21]Rose J., Shah M., ”Content-based image retrieval using gradient projections ,” Proceedings of Southeastcon '98 on IEEE, pp. 118-121, 1998
    [22]J.M. Balkin, Beth Simone Noveck, Kermit Roosevelt, ”Filtering the Internet:A Best Practices Model,” 1999
    [23]Hoashi K., Inoue, N., Hashimoto, K., ”Data collection for evaluating automatic filtering of hazardous WWW information ,”Internet Workshop on IEEE, pp. 157 -164, 1999
    [24]Ki-Wook Kim, Ki-Byoung Kim, Hyoung-Joo Kim, ” VIRON: an annotation-based video information retrieval system,” Proceedings of Computer Software and Applications Conference, pp.298-303, 1996
    [25]Andrei Popescu's , ”Implementation of term weighting in a simple IR system,”,
    [26]D. Smith, R. Harvey, Yi Chan and Bangham J.A, ”Classifying Web pages by content,” IEE European Workshop on Distributed Imaging, 1999.
    [27]Patrick S. Chen, ”An Automatic System for Collecting Crime Information on the Internet , ” Journal of Information, Law and Technology
    [28]Lee P.Y, Hui S.C., Fong A.C.M., ”Neural networks for web content filtering ,” IEEE Intelligent Systems, Volume: 17, pp. 48 -57,2002
    [29]林承宇, ”網際網路上「有害資訊內容」之探討─以我國法律管制可行性為中心,” 國立政治大學廣電研究所, 民89。
    [30]終止童妓協會Web547, http://www.web547.org.tw
    Advisor
  • Li-Ming Tseng(曾黎明)
  • Files
  • 90522012.pdf
  • approve immediately
    Date of Submission 2003-07-06

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