报告题目:Extended Proxy-Assisted Approach: Achieving Revocable Fine-Grained Encryption of Cloud Data
主讲嘉宾:廖啟瑞博士 Dr. Joseph Liu 澳大利亚Monash University
时间：2015年 1月5 日（周二）上午10:00 -- 11:00
地点：科技楼1504
报告摘要:
Abstract: Attribute-based encryption has the potential to be deployed in a cloud computing environment to provide scalable and fine-grained data sharing. However, user revocation within ABE deployment remains a challenging issue to overcome, particularly when there is a large number of users. In this work, we introduce an extended proxy-assisted approach, which weakens the trust required of the cloud server. Based on an all-or-nothing principle, our approach is designed to discourage a cloud server from colluding with a third party to hinder the user revocation functionality. We demonstrate the utility of our approach by presenting a construction of the proposed approach, designed to provide efficient cloud data sharing and user revocation. A prototype was then implemented to demonstrate the practicality of our proposed construction.
嘉宾简介：
Dr. Joseph Liu (廖启瑞博士) 在 2004 年取得香港中文大学信息工程系的博士学位。他的主要研究范畴包括: 网络安全、个人隐私、身份核实、公钥密码、云安全、智能城市安全等。他现在在澳大利亚蒙纳士大学 (Monash University) 信息技术学院 (Faculty of Information Technology) 担任高级讲师。之前，他在新加坡信息通讯研究院 (Institute for Infocomm Research, I2R) 担任研究员达 7 年之久。他一共发表超过 100 篇论文，当中包括多份 IEEE 期刊 (例如 IEEE TIFS, IEEE Trans. on Computers, IEEE TKDE, IEEE Trans. on Vehicular Technology,IEEE Network 等), 其中两篇论文更获 ESORICS 2014 及 ESORICS 2015 颁发最佳论文奖. 论文被引用超过3000次. H指数高达24。他的一项有关轻量密码学的研究，在2013年被ISO采纳成国际标准，供业内同行使用。他同时也担任一些学术会议的主席，包括ProvSec 2007, 2014以及ACISP 2016等。
Dr. Joseph Liu received the Ph.D. degree in information engineering from the Chinese University of Hong Kong in July 2004, specializing in cyber security, protocols for securing wireless networks, privacy, authentication, and provablesecurity. He is now a senior lecturer at Faculty of Information Technology, Monash University, Australia. Prior to that, he has been a research scientist at Institute for Infocomm Research (I2R), Singapore for more than 7 years.
His current technical focus is particularly cyber security in the cloud computing paradigm, smart city, lightweight security, and privacy enhanced technology. He has published more than 90 referred journal and conference papers including several papers in IEEE TIFS, IEEE Trans. on Computers, IEEE TKDE, IEEE Trans. on Vehicular Technology, IEEE Network etc. and received the Best Paper Award from ESORICS 2014 and ESORICS 2015. He has served as the program chair of ProvSec 2007, 2014, ACISP 2016 and as the program committee of more than 35 international conferences. One of his proposed schemes has been included in ISO standard in the area of lightweight cryptography.
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