Decentralized cryptography is one of the main research directions in cryptography, especially in a concurrent environment of multi-user applications, where there is no need to trust any authority. In these lectures, I will discuss the techniques to reduce the trust on the role of the authorities in advanced cryptographic schemes including multi-user encryptions, functional encryption and voting systems.
Lattice-based cryptography (LBC) is the study of cryptosystems whose security is based on the hardness of solving computational problems in lattices. It is currently a mainstream research direction, due to two main reasons. First, lattice-based systems may remain secure in the long-term future, even if the attackers have access to quantum computers (while traditional public-key cryptography based on the integer factorization (IF) and the discrete logarithm (DL) problems will be broken once powerful quantum computers become a reality). Second, lattices also enable fascinating cryptosystems which are not known to be achievable under the IF and DL problems.
In these lectures, I will first remind some background on LBC, and then, I will discuss the designs of several advanced cryptosystems from lattices:
- Fully-homomorphic encryption (FHE): Such a system allows to perform arbitrary operations on encrypted data and produce an encryption of the result. FHE may have many practical applications, e.g., in the outsourcing of private computations to the cloulds.
- Privacy-preserving protocols: These protocols aim to protect not only security of users but also their privacy. Two prominent examples are group signatures (which provide anonymity for users while keeping them accountable) and e-cash systems (which allow users to anonymously spend digital coins while ensuring that any coin cannot be spent twice).
Present by: Dr. Nguyen Ta Toan Khoa, Nanyang Technological University (NTU), Singapore.
Prof Hieu received his PhD in cryptography from the Ecole Normale Supérieure in 2005. He is currently a full professor at the XLIM, University of Limoges and a distinguished associate member of VIASM. His research focuses on the use of mathematical methods in the design of cryptographic schemes, with publications in Crypto, Eurocrypt, Asiacrypt, PKC, ACM CCS, Algorithmica etc. He has been a member of the steering committee of Asiacrypt since 2013 and is the general co-chair of the Asiacrypt 2016. He has served on the program committees of various international conferences, including Eurocrypt, Asiacrypt, PKC. In formation, he is currently the director of the Master 2 Mathematics – Cryptis – the first Master in France which publicly teaches Cryptology (100 000-in binary- years ago).
Dr Khoa Nguyen received his PhD degree in cryptography in 2014, at Nanyang Technological University (NTU), Singapore. He is currently a Presidential Postdoctoral Fellow at NTU. His research interests are in the area of post-quantum cryptography, especially the design and analysis of privacy-preserving cryptographic protocols from lattices and codes. Among his publications, 12 papers have been published at conferences held by the International Association of Cryptologic Research (IACR), such as EUROCRYPT, CRYPTO, ASIACRYPT and PKC. He has been co-supervising 4 PhD students and has been serving in the Program Committees of more than 10 international conferences in cryptography and security, including ASIACRYPT 2017, 2018 and 2019.
Prof. Minh-Triet Tran is an associate professor at University of Science, VNU-HCM. He obtained his B.Sc., M.Sc., and Ph.D. degrees in computer science from University of Science, Ho Chi Minh City, Vietnam in 2001, 2005, and 2009. He joined the University of Science, VNU-HCM, in 2001. His research interests include cryptography and security, human-computer interaction, and software engineering. He is currently vice-president of University of Science, VNU-HCM and Deputy Head of Artificial Intelligence Laboratory, University of Science, VNU-HCM. He is a member of the IEEE.
- From 15 April to 20 April, 2019
- Priority 1 for you who learned DCS-18, added to the comments and learning results from the DCS-18.
- Priority 2 for Students who are lecturers (by students) to write letters of recommendation to the Organizing Committee of DCS-19 (sent to the Facilitators or Philosophers and cc to Ms. Trang)
- Mail to Ms. Phung Thien Trang – firstname.lastname@example.org with Subject mail “Đăng ký tham gia DCS-19”
- Content of mail:
1. Full name.
2. Date of birth.
6. Email address.
7. Telephone number.
8. Write a paragraph that introduces you and your motivation to attend the DCS-19.
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