学术报告：RepuCoin: An extra resilient blockchain consensus

题目：RepuCoin: An extra resilient blockchain consensus

主讲人：Jianshan Yu，澳大利亚莫纳什大学助理教授

日期： 2019年12月31日 星期二

时间：下午3:00 - 4:00

地点：超算中心509

主持：陈旭 教授

摘要：This talk has two parts. In the first part I will present an overview on the security and privacy challenges in blockchain that we have been working on. In the second part I will talk about our recent work on blockchain consensus. In particular, existing proof-of-work based cryptocurrencies cannot tolerate attackers controlling more than 50% of computing power in the system at any time, but assume that such a condition happening is “unlikely”. However, recent facts and attacks render this assumption unrealistic. For example, in the last year, there are already at least 10 discovered 51% attacks, where a single attack stole up to 18 million US dollars. To address this issue, we propose RepuCoin, the world-first system that is able to tolerate 51% attack. While providing better resilience to known attacks, RepuCoin also achieves a high throughput of up to 20,000 transactions per second.

个人介绍：Jiangshan Yu is Assistant Professor at Monash University, Australia, and an honorary research fellow at University of Birmingham, UK, where he received his PhD degree under the supervision of Prof. Mark Ryan (HP Chair in Cybersecurity). He was a postdoc with Prof. Paulo Esteves-Verissimo (IEEE and ACM Fellow) at SnT, University of Luxembourg. He has obtained several awards to recognise his research outcomes. He received the Dean’s Research Impact Award at Monash University (2019); had been a finalist for Endeavour Awards which is a part of the Premier Awards Program in Australia (2019); received Chinese Government Award for Outstanding PhD Scholar Abroad (success rate: 1% worldwide, 2016); and had been a finalist for RAEng Enterprise Fellowship from the Royal Academy of Engineering (RAEng), UK (2015). His works have also achieved global coverage in hundreds of news media including ACM TechNews, ZDNet, Finder, Toutiao, Sohu, BTC Wires, ScienceDaily, Ethereum World News, EurekAlert!, The US Breaking news, Homeland Security Today, etc.