Skip to content. | Skip to navigation

Informatik 5
Information Systems
Prof. Dr. M. Jarke
Sections
Personal tools
You are here: Home Publications Robust Expert Ranking in Online Communities - Fighting Sybil Attacks

Contact

Prof. Dr. M. Jarke
RWTH Aachen
Informatik 5
Ahornstr. 55
D-52056 Aachen
Tel +49/241/8021501
Fax +49/241/8022321

How to find us

Annual Reports

Disclaimer

Webmaster

 

 

Robust Expert Ranking in Online Communities - Fighting Sybil Attacks

Year 2012

Nowadays, many online communities provide means for users to contribute in the evaluation of community created media by tagging, commenting and rating. Judging the users expertise in such collaborative systems is an important issue. As these systems are becoming increasingly popular, they are attackable, e.g. by Sybil Attacks. Thus, an effective expert ranking strategy must be robust to such attacks. In this paper, we propose MHITS, an algorithm to rank users’ expertise by exploiting the number of users’ fair ratings and direct trust users gain in the online community. We integrate SumUp, a Sybil-resilient algorithm, into MHITS algorithm as a robust ranking strategy. Experimental results show the effectiveness of the proposed method, which can ensure that the highly ranked experts are highly trusted users and provide the high number of fair ratings for the relevant media. We contribute to the experimental evaluation of algorithms for online systems, fighting malicious behavior.

Details

Proceedings of the 8th IEEE International Conference on Collaborative Computing: Networking, Applications and Worksharing, Pittsburgh, Pennsylvania, United States, October 14–17, 2012

Authors

Presented at

COLLABORATECOM, 2012 , Pittsburgh, Pennsylvania, , US.

Published in

Proceedings of the 8th IEEE International Conference on Collaborative Computing: Networking, Applications and Worksharing, Pittsburgh, Pennsylvania, United States, October 14–17, 2012 .

Document Actions