Optimistic Fair Exchange Revisited



地点:勤学楼 3305

题目: Optimistic Fair Exchange Revisited

报告人:Man Ho Allen Au 博士 香港理工大学 

摘要: Optimistic fair exchange (OFE) is a type of cryptographic protocols aimed at solving the fair exchange problem over open networks with the help of a third party to settle disputes between exchanging parties. It is well known that a third party is necessary in the realisation of a fair exchange protocol. However, a fully trusted third party may not be available over open networks. In response to this issue, recent OFE constructions also consider the security when the third party, often known as the arbitrator, is dishonest in a certain sense.  In this talk, we present our recent findings on OFE when we consider the case when the arbitrator could collude with one of the participating parties.


Man Ho Allen Au received the bachelor’s and master’s degrees from the Department of Information Engineering, Chinese University of Hong Kong, in 2003 and 2005 respectively, and the Ph.D. degree from the University of Wollongong, Australia, in 2009. Currently, he is an assistant professor at Dept. of Computing, the Hong Kong Polytechnic University. Before moving to Hong Kong in July 2014, he has been a lecturer at the School of Computer Science and Software Engineering, University of Wollongong, Australia.

Dr. Au’s research interests include Information Security and Privacy, Applied Cryptography, Accountable Anonymity and Cloud Computing. He has published over 80 papers in those areas in journals such as IEEE Transactions on Information Forensics and Security, IEEE Transactions on Knowledge and Data Engineering, ACM Transaction on Information and System Security and IEEE Transactions on Vehicular Technology and international conferences including the Network and Distributed System Security Symposium (NDSS) and the ACM Conference on Computer and Communications Security (CCS).

By 2015, he has served as a program committee member in over 25 international conferences/workshops. He is also a program committee co-chair of the 8th International Conference on Network and System Security and the 9th International Conference on Provable Security. He is an associate editor of the Journal of Information Security and Applications, Elsevier. He has served as a guest editor for various journals including Future Generation Computer Systems, Elsevier and Concurrency and Computation: Practice and Experience, Wiley.

More information about him can be found at www.comp.polyu.edu.hk/~csallen