Decentralized Cryptography School - DCS’19

MAIN CONFERENCE TOPIC

Multi-user cryptography

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.

Present by: Prof. Phan Duong Hieu, XLIM, University of Limoges, France

Lattice-based cryptography (LBC)

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.

Invited Speakers

Established researchers in cryptography

Actual Topics

The hot topic about Decentralized Cryptography

Modern classrooms

Classrooms have many modern tools

Useful knowledge

A lot of useful knowledge about decentralized cryptography

Decentralized Cryptography School - DCS’19

COURSE SCHEDULE

Registration
April 15th - April 20th, 2019 - Registration

Registration method

Mail to Ms. Phung Thien Trang – dcs@hcmus.edu.vn
Subject:  “Đăng ký tham gia DCS-19”

Mail content

Full name.
Date of birth.
University.
Class.
Speciality.
Email address.
Telephone number.
Write a paragraph that introduces you and your motivation to attend the DCS-19.
The priority to review

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)
April 24th - April 27th, 2019 - Course starts
April 24th, 2019

13:30 - 14:45 at Room F203

Prof. Phan Duong Hieu

Lecture 1: Introduction to Modern Cryptography

15:15 - 16:30 at Room F203

Dr. Nguyen Ta Toan Khoa

Lattices and fully-homomorphic encryption (1 lecture)

April 25th, 2019

8:30 - 9:45 at Room B11a

Prof. Phan Duong Hieu

Lecture 2: Advanced Primitives in Multi-user Cryptography

10:15 - 11:30 at Room B11a

Dr. Nguyen Ta Toan Khoa

Zero-knowledge proofs and lattice-based privacy-preserving cryptographic protocols (part 1)

13:30 - 16:00 at Room B11a

Prof. Tran Minh Triet & TA. Tran Minh Khoa

Practice

April 26th, 2019

8:30 - 9:45 at Room i23

Prof. Phan Duong Hieu

Lecture 3: Electronic Voting System

10:15 - 11:30 at Room i23

Dr. Nguyen Ta Toan Khoa

Zero-knowledge proofs and lattice-based privacy-preserving cryptographic protocols (part 2)

14:00 - 15:00 at Room i23

Seminar 1: Reinventing cash, digitizing cash

Money is arguably the most important invention in human history. From its first use in the Tang Dynasty (A.D. 618-907), we’ve had more than a thousand years of practice holding and using paper currency. Cash – that you can hold in your hand – is prized for its anonymity, its ease and speed of use, and its independence from insular, exclusive and overly centralized financial institutions. We are building the new cash, the applications that come with it, and the digital infrastructure that maintains it essential qualities and reshapes it for an interconnected world. This talk will center around how the constant chain and native token are uniquely designed to synthesize the essential features of cash with the borderless freedom, privacy and accessibility of a digital currency.

Presenter: Duy Huynh, Bao Le, Dung Van

15:30 - 16:30 at Room i23

Seminar 2: Distributed random number generationbased on homomorphic encryption abstract

We present a protocol which can be implementedon a blockchain that ensures unpredictable, tamper-resistant, scalable and publicly-verifiable outcomes. Themain building blocks of our protocol are homomorphicencryption (HE) and verifiable random functions (VRF).The use of homomorphic encryption enables mathematicaloperations to be performed on encrypted data, to ensureno one knows the outcome prior to being generated.

Presenter: Quang Le, Rinar

SPEAKERS

FROM LATEST CONFERENCE - DCS'18 - QUY NHON

Registration

Registration time

  • From 15 April to 20 April, 2019

The priority to review

  • 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)

Registration method

  • Mail to Ms. Phung Thien Trang – dcs@hcmus.edu.vn with Subject mail “Đăng ký tham gia DCS-19”
  • Content of mail:

1. Full name.
2. Date of birth.
3. University.
4. Class.
5. Speciality.
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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