Document copy detection technology
Huidong Ma · Journal of Yanshan University · 2007
With the rapid development of digital library and the intemet,digital documents are easily acquired.Recent years,there are many news about plagiarism on reseach,and the number of duplicated pages on the web is increasing,which lower the efficiency of search and put users to inconvenience.The copy detection technique plays an important role on intellectual property protection and information retrieval,this technique is the hot topic in field of database security.There are two approachs to copy detection, one is based on the frequency of words which appear in the document,the other is based on the string match.The exsited systems based on the two approachs are analyzed and the merit and shortage is pointed out.The improved scheme is proposed.The characters that copy detection technique should satisfy are summarized,and the veracity of detection and rules of document division are di- scussed.