讲座题目：Cryptographic Accumulator and Its Application to RingCT 2.0 – A Compact Protocol for Blockchain-Based Cryptocurrency Monero

讲座人：Allen Au

讲座日期：2017年9月25日

讲座时间：10:30-12:00

地点：长安校区 文津楼三段6层622学术报告厅

主办单位：太阳成集团tyc4633  网络与信息安全团队

报告简介： Monero is one of the most popular blockchain-based privacy-preserving crypto-currencies with a market cap of over 1.7 billion USD. At its core is a protocol known as RingCT, which aims to provide transaction privacy by hiding the identity of the sender and the receiver, as well as the transaction amount. 

In this talk, we present our a new construction of cryptographic accumulators, together with several zero-knowledge protocols to demonstrate statements about elements accumulated. Based on our accumulator, we improve RingCT. The resulting protocol, known as RingCT 2.0, reduces the transaction size from O(n) to O(1), where n is a parameter governing sender privacy. We conclude the talk with a few issues in ringCT 2.0.

报告人简介： Dr. Allen Au is an assistant professor at the Department of Computing, Hong Kong Polytechnic University. He received his Ph.D. from the University of Wollongong in 2009. Dr. Au's research interests include information security, applied cryptography, accountable anonymity, and blockchain. He has published over 100  papers in top conferences and journals, including ACM CCS, NDSS, IEEE TIFS, etc. His work has been cited over 2600 times, with an h-index of 27. He received the 2009 PET runner-up award for outstanding research in privacy enhancing technologies for his papers in CCS07 and CCS 08, and the best paper award at ACISP 2016. He is now serving as a committee member of the Hong Kong Blockchain Society R&D division.