时间：2012年12月21日(星期五)下午15:30
地点：成功楼603教室
主讲：澳大利亚卧龙岗大学 Dr. Man Ho Au
主办：数计学院
专家简介：Man Ho Au于2009年7月获得澳大利亚卧龙岗大学计算机专业博士学位，现为澳大利亚卧龙岗大学计算机科学与软件系助理教授，研究方向包括密码技术、公钥密码学、隐私保护等。在包括ACM TISSEC、IEEE Systems Journal等国际学术期刊和ACM CCS (2012, 2008, 2007)、NDSS (2012)、ESORICS (2012, 2010)等国际学术会议上发表学术论文40多篇。个人主页为：
报告摘要：Anonymous authentication is an important tool for user privacy protection. Unfortunately, anonymity can give users the license to misbehave. Thus, practical privacy-preserving authentication mechanism should provide accountability on top of anonymity. Allowing the service providers to blacklist misbehaving anonymous users is a way of ensuring user accountability. In this talk, we discuss an authentication mechanism in which anonymous users can be blocked based on their overall behavior while maintaining their privacy. As an example, we also discuss the use of reputation-based anonymous blacklisting mechanism in privacy-preserving payment system.