Improving the precision of the keyword-matching pornographic text filtering method using a hybrid model.
With the flooding of pornographic information on the Internet, how to keep people away from that offensive information is becoming one of the most important research areas in network information security. Some applications which can block or filter such information are used. Approaches in those systems can be roughly classified into two kinds: metadata based and content based. With the development of distributed technologies, content based filtering technologies will play a more and more important role in filtering systems. Keyword matching is a content based method used widely in harmful text filtering. Experiments to evaluate the recall and precision of the method showed that the precision of the method is not satisfactory, though the recall of the method is rather high. According to the results, a new pornographic text filtering model based on reconfirming is put forward. Experiments showed that the model is practical, has less loss of recall than the single keyword matching method, and has higher precision.
Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai 200030, China. sugy@sjtu.edu.cn
Gui-yang
GY
Su
Jian-hua
JH
Li
Ying-hua
YH
Ma
Sheng-hong
SH
Li
D000465:Algorithms; D016494:Computer Security; D003628:Database Management Systems; D004882:Erotica; D016247:Information Storage and Retrieval / Q000379:methods; D020407:Internet; D009323:Natural Language Processing; D010363:Pattern Recognition, Automated / Q000379:methods*; D009626:Terminology as Topic; D014584:User-Computer Interface; D018875:Vocabulary, Controlled