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http://dx.doi.org/10.13089/JKIISC.2014.24.2.335

Measures of Abnormal User Activities in Online Comments Based on Cosine Similarity  

Kim, Minjae (Center for Information Security Technologies(CIST), Korea University)
Lee, Sangjin (Center for Information Security Technologies(CIST), Korea University)
Publication Information
Journal of the Korea Institute of Information Security & Cryptology / v.24, no.2, 2014 , pp. 335-343 More about this Journal
Abstract
It is more important to ensure the credibility of internet media which influence the public opinion. However, there are vague suspicions in public from the examples of manipulation of online reviews with anonymity. In this study, we explore the possibility of manipulating public opinion in online web sites. We investigate the characteristics of comments posted by users on web sites and compare each comments by using the cosine similarity function. Our result shows followings. First, we found a correlation between the similarities of comments and the article ranks in the web sites. Second, it is possible to identify abnormal user activities indicating excessive multiple posting, double posting and astroturf activities.
Keywords
abnormal activities; cosine similarity; public opinion; manipulation; astroturfing;
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Times Cited By KSCI : 1  (Citation Analysis)
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