报告时间: 2017年3月20日 16:00-17:30

报告地点: 文津楼3段 622

报告题目: Privacy Protection in Blockchain-Based Crypto-Currencies

报告人: 区文浩(Man Ho Au)助理教授 香港理工大学

报告介绍: Research in crypto-currency cash dated back to the early 80s. Thanks to the growing popularity of bitcoin, the first crypto-currencies successfully deployed in practice, research in this area has become very active recently.

In this talk, we are going to review existing results on crypto-currencies and the recent research trend. First, we will go through the concept of blockchain, and discussed how it can be used to address some of the major challenges in crypto-currencies. Then, we compare the privacy levels offered by various constructions such as bitcoin (XBT), Zcash (ZEC) and Monero (XMR). After that, we review the concept of ring signatures. Originally developed for whistleblowing, we show that there is a surprising connection between ring signatures and blockchain-based crypto-currencies.

We conclude the talk with other potential applications of blockchain and some open problems related to the use of ring signatures in crypto-currencies.

报告人介绍: Dr. Au is currently an assistant professor professor at the Department of Computing, the Hong Kong Polytechnic University. 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 100 refereed journal and papers, including the well-respected ACM Conference on Computer and Communications Security (CCS) and the Network and Distributed System Security Symposium (NDSS). His work received many awards, including the 2009 PET runner-up award for outstanding research in privacy enhancing technologies and the best paper award at ACISP 2016. According to Google Scholar, his work has been cited for more than 2000 times, with an h-index of 24 and i-10 index of 54.

Dr. Au is an active member in the community and has served as a program committee member of around 30 international conferences. He has served as a PC co-chair of the 12th International Conference on Green, Pervasive and Cloud Computing, the 9th International Conference on Provable Security and the 8th International Conference on Network and System 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.