Group-based ranking method for online rating systems with spamming attacks

¹ Web Sciences Center, University of Electronic Science and Technology of China - 611731 Chengdu, PRC
² Big Data Research Center, University of Electronic Science and Technology of China - 611731 Chengdu, PRC

^(a) msshang@uestc.edu.cn
^(b) zhutou@ustc.edu

Received: 6 January 2015
Accepted: 16 April 2015

Abstract

The ranking problem has attracted much attention in real systems. How to design a robust ranking method is especially significant for online rating systems under the threat of spamming attacks. By building reputation systems for users, many well-performed ranking methods have been applied to address this issue. In this letter, we propose a group-based ranking method that evaluates users' reputations based on their grouping behaviors. More specifically, users are assigned with high reputation scores if they always fall into large rating groups. Results on three real data sets indicate that the present method is more accurate and robust than the correlation-based method in the presence of spamming attacks.