Speaker:Man Ho Au, Doctor, Department of Computing, The Hong Kong Polytechnic University, HK

Date:April 23, 2017

Time:9:00 am

Location:Meeting Room, Third Floor of Teaching and Research Building, Software Park Campus

Sponsor:the School of Computer Science and Technology

Abstract:

Introduced in 2001, a ring signature is a type of digital signature that can be created by anyone in a group of people. In contrast to group signatures, ring signatures are ad-hoc and do not require any coordination among the users. It is originally designed as away to leak a secret. Since then, it has found applications as a building in other cryptographic primitives, such as optimistic fair exchange, designate dverifier signatures and ad-hoc key exchange. In this talk, we are going to review existing results on ring signatures and their variants. Next, we introduce Monero, one of the most popular block chain-based crypto-currencies. In particular, we discuss how variants of ring signatures are applied in Monero to ensure its security and privacy. We conclude the talk with some open problems related to the use of ring signatures in block chain-based crypto-currency and some promising directions.

Bio:

Dr. Au is currently an assistant 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 theJournal of Information Security and Applications, Elsevier. He has served as a guest editor for various journals, includingFuture Generation Computer Systems, ElsevierandConcurrency and Computation: Practice and Experience, Wiley.

For more information, please visit:

http://www.cs.sdu.edu.cn/getNewsDetail.do?newsId=9448

Edited by: Shi Yajie