Dongxia Wang

I joined Zhejiang University as an assistant professor in 2020. I received my PhD degree in computer science from Nanyang Technological University, under supervision of Dr. Yang Liu and Dr. Jie Zhang. After graduation, I worked as a postdoc in the Department of Computer Science, University of Oxford and in the School of Information Systems, Singapore Management University, respectively.

My research interests mainly lie in the security of intelligent systems, robust decision making and also trust systems. Some significant research contributions can be summarised as 1) proposed a unified quantification framework of misleading feedback attacks based on information theory, and accordingly uncovered the strongest attacks, which renders most existing trust-based decision making schemes ineffective; 2) proposed robust decision making mechanisms which are proved to have guaranteed decision accuracy, faced with the entire attack space. My research aims to improve the decision robustness of various types of intelligent systems, considering theories and techniques from multiple disciplines such as decision making, multi-agent systems, trust systems and cyber security.

Work Experience

2019.07 - 2020.09 Research Scientist, School of Information Systems, Singapore Management University

2018.05 - 2019.05 Research Associate, Department of Computer Science, University of Oxford.

Education

2013.08 - 2018.02 Computer Science, Nanyang Technological University

2009.08 - 2013.07 Information Engineering, Xi'an Jiaotong University

Publication

"Secure Decision Making with Arbitrarily Malicous Recommendations"

D. Wang, T. Muller, J. Sun. In proceedings of The 33rd IEEE Computer Security Foundations Symposium (CSF), June 2020.

"Information Theoretical Analysis of Unfair Rating Attacks under Subjectivity"

D. Wang, T. Muller, J. Zhang, Y. Liu. IEEE Transactions on Information Forensics and Security (TIFS), 2019.

"Multi-Source Trust Revision"

A. Josang, J. Zhang, D. Wang. 20th International Conference on Information Fusion (Fusion), July 2017.

"Is it Harmful when Advisors only Pretend to be Honest?"

D. Wang, T. Muller, J. Zhang, Y. Liu. In Proceedings of the 30th AAAI Conference on Artififical Intelligence (AAAI), Feb 2016.

"How to Use Information Theory to Mitigate Unfair Rating Attacks"

T.Muller, D. Wang, J.Zhang, Y. Liu. In Proceedings of the 10th IFIP International Conference on Trust Management (IFIPTM), July 2016. (Best Paper Award)

"Quantifying Robustness of Trust Systems against Collusive Unfair Rating Attacks Using Information Theory"

D. Wang, T. Muller, J. Zhang, Y. Liu. In Proceeding of the 24th International Joint Conference on Artifificial Intelligence (IJCAI), July 2015.

"Using Information Theory to Improve the Robustness of Trust System"

D. Wang, T. Muller, A. Aravazhi Irissappane, J. Zhang, Y. Liu. In Proceedings of the 14th International Conference on Autonomous Agents and Multiagent Systems (AAMAS), May 2015.

"Information Theory for Subjective Logic"

D. Wang, T. Muller, A. Josang. In Proceedings of 12th International Conference on Modeling Decisions for Artificial Intelligence (MDAI), Sep 2015.

"Towards Robust and Effffective Trust Management for Security: A Survey"

D. Wang,T. Muller, Y. Liu, J. Zhang. In Proceedings of the 13th IEEE International Conference on Trust, Security and Privacy in Computing and Communications (Trust-Com), Sep 2014.

Research

· Security of Intelligent Agent Systems · Trust Systems · Robust Decision Making