[Date]:2025/10/10～2025/10/22

Number-theoretic algorithms related to algebraic curves and abelian varieties｜2025c001

Overview

• How to hold:Hybrid Meeting (In-person/Zoom)
• Venue:   IMI Conference Room (W1-D-414), West Zone 1, Ito campus, Kyushu University
• Main language: Japanese
• Type/Category: Openings at any time-Workshop (Ⅱ)
• Title of Research Project:Number-theoretic algorithms related to algebraic curves and abelian varieties
• Principal Investigator: Ryo Ohashi (Graduate School of Information Science and Technology, The University of Tokyo/ Project Researcher）
• Research Period: October 20, 2025.～October 22, 2025
• Open to the Public: October 20, 2025.～October 22, 2025
• Details of the Research Plan: https://joint2.imi.kyushu-u.ac.jp/en_research_chooses/view/2025c001

Program

13:30-14:30

Tomoki Moriya (Information Technology R&D Center, Mitsubishi Electric Corporation)

Introduction to isogeny-based cryptography

15:00-16:00

Hiroshi Onuki (The University of Tokyo)

Isogeny-based public key encryption schemes using 2-dimensional isogenies

16:30-17:30

Kohei Nakagawa (NTT Social Informatics Laboratories)

On signature schemes using 2-dimensional isogeny

10月21日(火)

09:30-10:30

Yusuke Aikawa (The University of Tokyo)

Isogeny Expanders

11:00-12:00

Ryo Yoshizumi (Kyushu University)

Efficient isogeny computations in theta coordinates on abelian varieties

13:30-14:30

Akira Katayama (NTT Social Informatics Laboratories)

Algorithms for computing a basis of the endomorphism ring and the set of isogenies of elliptic curves over a finite field

15:00-16:00

Yasuhiro Ishitsuka (Kyusyu University)

Algorithmic aspects of arithmetic statistics

16:30-17:30

Discussion

10月22日(水)

09:30-10:30

Momonari Kudo (Fukuoka Institute of Technology)

Introduction to superspecial curves: History and recent developments

11:00-12:00

Ryo Ohashi (The University of Tokyo)

Enumeration algorithms for superspecial curves using isogeny graphs

Registration

Advance registration is required. 
Free participation fee.
(Registration also requires Organizing Committee members and speakers.)
Registration may be closed when the number of participants reaches the maximum.

＼Please go to the following link for registration.／