地点：计算机学院B404

邀请人：何德彪教授

题目一：Anomaly Detection and Identification of Natural Data using Benford’s Law

时间：2018年4月18日 14:00

地点：国家网络安全学院五楼会议室

报告人：Prof. Anthony T.S. Ho

报告人单位：University of Surrey

报告摘要：This talk will present an overview of the theory and applications of Benford’s law for anomaly detection in natural data. Some examples will be highlighted including the detection of glare effect in images and classification of biometric images for privacy protection, as well as security attacks related to network traffic data. Recent research based on this law has further shown that consistent anomaly patterns could be achieved for different network attacks, leading to the potential identification/pattern recognition of various types of attacks. Moreover, Benford’s law has also been successfully applied for the detection of Alzheimer’s Disease based on Electroencephalogram (EEG) data and this will be highlighted in the presentation.

报告人简介：Professor Anthony T.S. Ho served as Head of Department of Computer Science, University of Surrey from 2010 to 2015. He is also a Tianjin Distinguished Professor, Guest Professors of Tianjin University of Science and Technology and of Wuhan University of Technology, China. He was the recipient of the prestigious Institution of Engineering and Technology (IET) Innovation in Engineering Award under the Security category for his research and commercialization work on digital watermarking in 2006. Professor Ho obtained his BSc (Hons) in Physical Electronics from Northumbria University in 1979, his MSc in Applied Optics from Imperial College London in 1980 and his PhD in Digital Image Processing from King's College London, University of London in 1983. After graduation, he worked in technical management positions in industry for 11 years in the UK and Canada. From 1994 to 2005, He was a Senior Lecturer and then Associate Professor at Nanyang Technological University (NTU), Singapore. He has published more than 150 articles in international journals and conference proceedings as well as 8 international patents granted related to watermarking and steganography. Professor Ho is Founding Editor-in-Chief of the International Journal of Information Security and Applications (JISA) and an Area Editor for Signal Processing: Image Communication, both published by Elsevier. He was appointed as Associate Editor for IEEE Transactions on Information Forensics and Security (TIFS) for three years commencing January 2016, He has also served as Associate Editor for IEEE Signal Processing Letters (SPL) (2014-2016), as well as an Associate Editor for EURASIP Journal of Image and Video Processing published by Springer. Professor Ho is a Fellow of Institution of Engineering and Technology (FIET), Fellow of Institute of Physics (FInstP) and Fellow of British Computer Society (FBCS).

题目二：Applications of Blockchain: Cryptocurrency and Beyond

时间：2018年4月18日 14:45

地点：国家网络安全学院五楼会议室

报告人：Dr. Man Ho Au

报告人单位：Hong Kong Polytechnic University

报告摘要：Conceptualized 10 years ago as a core component of Bitcoin, blockchain has gained a vast amount of interest. Informally speaking, a blockchain is a distributed, shared, and immutable ledger that maintains a growing list of ordered records. It became extremely popular among the industries in the last few years. Many companies are exploring applications of blockchain beyond cryptocurrencies. In this seminar, the speaker will introduce blockchain and highlight some of the latest research works in this area, with an emphasis of how cryptography plays a crucial role. Examples of highlights include how cryptographic primitives such as ring signatures and zero-knowledge proofs can be used to enhance privacy in blockchain applications. He will also present applications of blockchain beyond cryptocurrencies and discuss gaps between the research community and these new applications areas. He will also share his views and some potential solutions on these issues.

报告人简介：Dr. Man Ho Au received his PhD degree from the University of Wollongong in 2009. He is now an assistant professor and a director of Monash-PolyU-CC Joint Lab on Blockchain and Cryptocurrency at the Department of Computing, Hong Kong Polytechnic University. His research interests include information security and blockchain technology. His recent research activities are generously supported by the Hong Kong Research Grant Council (RGC), Hong Kong Innovation and Technology Commission (ITC), National Natural Science Foundation of China (NSFC) and the industries. Dr. Au has published over 130 refereed papers in top journal and conferences, including ACM CCS, ACM SIGMOD, NDSS, IEEE TIFS, TC, TKDE, etc. He is a recipient of the 2009 PET runner-up award for outstanding research in privacy enhancing technologies, and best paper award at ACISP 2016 and ISPEC 2017. His work has been cited over 3000 times, with an h-index of 31. He is an expert member of the China delegation of ISO/IEC JTC 1/SC 27 working group 2 - Cryptography and security mechanisms. He is also a committee member of the Hong Kong Blockchain Society R&D division.

题目三：Privacy-Preserving Techniques to Blockchain: The Ring Signature Approach

时间：2018年4月18日 15:30

地点：国家网络安全学院五楼会议室

报告人：Dr. Joseph Liu

报告人单位：Monash University

报告摘要：Ring signature is a kind of anonymous signature. Verifier only knows that the signer is a user within a group, yet does not know the identity of this signer. In this talk, we will cover the basics of ring signature and linkable ring signature, including the concept, applications, technical constructions and variants. We will further relate linkable ring signature to cryptocurrencies and discuss how it can provide privacy to users in Blockchain. We will also discuss some interesting future works in this area.

报告人简介：Dr. Joseph Liu is a senior lecturer in the Faculty of Information Technology, Monash University. He got his PhD from the Chinese University of Hong Kong at 2004. Prior to joining Monash at 2015, he has worked as a research scientist at Institute for Infocomm Research (I2R) in Singapore for more than 7 years. His research areas include cyber security, blockchain, applied cryptography and privacy enhanced technology. His papers receive more than 4200 citations and his H-index is 37. His remarkable research in linkable ring signature forms the theory basis of Monero (XMR), one of the largest cryptocurrencies in the world.

题目四：Cryto encounters with Currencies

时间：2018年4月18日 16:15

地点：国家网络安全学院五楼会议室

报告人：Dr. Kaitai Liang

报告人单位：University of Surrey

报告摘要：To date everyone talks about cryptocurrencies. Similar to the concepts of big data and cloud, few of us know what are cryptocurrencies. In this talk, I will introduce some basic concepts and notions of cryptocurrencies, and further present some security and privacy risks brought by blockchain techniques. Besides, I will explore some new functionalities into blockchain technologies (by leveraging applied crypto) so that the technologies could be transferred to new applications.

报告人简介：Dr. Kaitai Liang is an Assistant Professor in Secure Systems at the University of Surrey, UK, and member of the Surrey Centre for Cyber Security, a GCHQ recognised UK Academic Centre of Excellence in Cyber Security Research. Kaitai received the PhD degree in computer science (applied cryptography direction) from City University of Hong Kong in 2014. Prior to SURREY, Kaitai was a Lecturer in School of Computing, Mathematics and Digital Technology, Manchester Metropolitan University; postdoctoral researcher at Department of Computer Science, Aalto University (Finalnd); visiting scholar at Department of Computer Science, UCL; visiting scholar at KU LEUVEN (Belgium), Sapienza University of Rome (Italy) and University of Wollongong (Australia); research intern in Institute for Infocomm Research (Singapore). Kaitai has been involved in a few European funded projects. His main research interests are applied crypto, data security, big data security, blockchain, smart contract and privacy-enhancing technology. Kaitai has published a series of research works, applying secure tools to tackle real-world problems, in many high tier international journals (e.g., IEEE TIFS, IEEE NETWORK, and IEEE Transactions on Industrial Informatics). Kaitai has served as TPC for many renown international security/privacy conferences, e.g., ACNS, TRUSTCOM, ASIACCS, ACISP, ProvSec, and he was the pc chair of International workshop on Security in Big Data. Kaitai is also an official ISO member of UK ISO Crypto Sub Committee IST/33/2.

题目五：Lightweight Cryptography

时间： 2018年4月18日 17:00

地点：国家网络安全学院五楼会议室

报告人：Dr. Jian Guo

报告人单位：Nanyang Technological University

报告摘要：Recent years have witnessed massive and wide deployment of IoT devices, ranging from smart cards to implanted medical devices. It is estimated that 50 billion IoT devices will be connected by year 2020. The diverse feature of IoT devices results in many special requirements to cryptographic mechanisms over traditional ones, such as low hardware area when implemented on small devices or low energy consumption when running on devices powered by limited battery. We show, by examples of concrete designs, how effective cryptographic mechanisms are still possible under these constraints without affecting the security strengths. It is also interesting to note that a single algorithm could be implemented in several ways to fit very different IoT usecase scenarios while keeping the functionality and security strength unaffected.

报告人简介：GUO Jian received his B. Eng with First class honors from School of Computer Engineering, and PhD from School of Physical and Mathematical Sciences of Nanyang Technological University in Singapore in 2007 and 2011, respectively. He then worked with Institute for Infocomm Research in Singapore for 2.5 years, and returned to NTU as a researcher in 2013. He subsequently joined Temasek Labs as a Principal Investigator and SPMS as an Assistant Professor. His major research interest is symmetric-key cryptography, including cryptanalysis, design and implementation of (lightweight) hash functions, block ciphers, authenticated encryption schemes, and their applications such as message authentication codes. He co-designed PHOTON --- one of the ISO standards of lightweight hash functions, CLOC and SILC authenticated ciphers --- one of the third round candidates of the on-going CAESAR competition, as well as LED --- one of the lightest block ciphers suitable for constrained hardware. He has done some intensive cryptanalysis against various cryptographic primitives including the latest NIST hash function standard SHA-3, on which he and his team won several awards. Among others, he published 20+ papers in top conferences under the International Association for Cryptologic Research. He is founding co-chair of ASK — the Asian workshop on Symmetric-Key cryptography. He served as general co-chair of FSE 2013, program committee members of FSE 2017, ASIACRYPT 2017, FSE 2018, EUROCRYPT 2018, FSE 2019, etc, and reviewer for all major cryptography conferences and journals. He is a member of ASIACRYPT steering committee representing for Singapore, and also a member of the Security and Privacy Standards Technical Committee acting as Singapore delegate of the International Standardization ISO/IEC JTC 1/SC 27. His research attracted government research grants worthing a total of more than one million Singapore dollars, with which he recruited and manages the Cryptanalysis Taskforce research group at NTU.

2018年4月17日