时间：2015年3月30日（星期一）下午15:00
地点：仓山校区成功楼603报告厅
主讲：香港理工大学 Man Ho Allen AU助理教授、博士生导师
主办：数学与计算机科学学院、福建省网络安全与密码技术重点实验室
专家简介：Man Ho Au，香港理工大学电子计算学系助理教授、博士生导师。2009年7月获得澳大利亚Wollongong大学计算机专业博士学位。研究领域包括密码技术、公钥密码学、隐私保护等。在《ACM TISSEC》、《IEEE Transactions on Information Security》、《IEEE Transactions on Knowledge and Data Engineering》、《IEEE Transactions on Computers》、《IEEE Systems Journal》等国际学术期刊和《ACM CCS》(2012, 2008, 2007)、《NDSS》(2012)、《ESORICS》(2012, 2010)等顶级国际会议上发表学术论文80多篇。
报告摘要：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 realization 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.