会议时间:2017年6月7日 8:30



时间 内容 报告人
8:30-9:30 主题报告:
Traitor Deterring Schemes:
Using Bitcoin as Collateral for
Digital Contents
9:30-10:30 主题报告:
Cryptographic applications
in IoT and Big Data
in IoT and Big Data
10:40-12:00 对行业应用驱动的密码学
14:00-17:00 自由研讨 与会学者











报告题目:Traitor Deterring Schemes: Using Bitcoin as Collateral for Digital Contents


报告摘要:We will introduce a new cryptographic primitive called a Traitor Deterring Scheme (TDS) as a new generation of cryptographic technique for copyright protection. A TDS is a multi-recipient public-key encryption scheme where an authority issues decryption keys to a set of users. The distinguishing feature of a TDS is that secret-keys are issued only after the users provide some private information as a form of collateral. The traitor deterring property ensures that if a malicious coalition of users (aka ``traitors'') produces an unauthorized (aka ``pirate'') decryption device, any recipient of the device will be able to recover at least one of the traitors' collaterals with only black-box access to the device. On the other hand, honest users' collaterals are guaranteed to remain hidden.


We show how bitcoin can be used as collateral for real world deployment of TDS's for the distribution of digital content. Along the way, we present cryptographic building blocks that may be of independent interest, namely fuzzy lockers, and comparison predicate encryption schemes for exponentially large domains. If time allowed, I may also discuss the connection of TDS to a 20-year open problem of digital signet proposed by Dwork, Lotspiech and Naor at STOC 96.


报告人简介:Qiang Tang is currently an assistant professor at New Jersey Institute of Technology and also a core member of the Cybersecurity Research Center (http://centers.njit.edu/cybersecurity/). His research interests are applied and theoretical cryptography, privacy and computer security. In particular, in the intersection of accountability, post-Snowden Cryptography, and blockchain technology. Before joining NJIT, Qiang was a postdoctoral associate at Cornell University and was also affiliated with IC3: the Initiative of CryptoCurrency and Contract (http://www.initc3.org/) . Qiang obtained his Ph.D from the University of Connecticut and was awarded Taylor Booth fellowship. He was also holding visiting researcher positions at the University of Wisconsin, Madison, NTT research, Tokyo, and the University of Athens, Greece. Qiang's work has appeared at various top venues including Eurocrypt, CCS, Asiacrypt, and IEEE TIFS.






报告题目:Cryptographic applications in IoT and Big Data Security and Privacy


报告摘要: Cryptography is one of the most important core technologies for information security. Nowadays, rapid growth of big data processing and IoT enable services among multiple organizations bring both promising prospects and security&privacy challenges. With light-weight devices which are connected in the environment of IoT networks, huge volume and various data can be gathered from all over the world. It is crucial to secure and utilize such Big data. In this talk, the speaker will introduce his research on design and security analysis of cryptographic primitives, and cryptographic application in construction secure protocols for big data utilization and IoT-enable services, including secure data outsourced analysis, privacy-preserving data mining and data management, secure authentication schemes for IoT devices and so on.


报告人简介: The speaker Chunhua Su received the B.S. degree for Beijing Electronic and Science Institute in 2003 and received his M.S. and PhD of computer science from Faculty of Engineering, Kyushu University in 2006 and 2009, respectively. He is currently working as an Associate Professor in Division of Computer Science, University of Aizu. He has worked as a research scientist in Cryptography & Security Department of the Institute for Infocomm Research, Singapore from 2011-2013. From 2013-2016, he has worked as an Assistant professor in School of Information Science, Japan Advanced Institute of Science and Technology. From 2016-2017, he worked as Assistant Professor in Graduate School of Engineering, Osaka University. His research interests include cryptanalysis, cryptographic protocols, privacy-preserving technologies in data mining and IoT security & privacy.