Keitaro Hiwatashi

Keitaro Hiwatashi

Biography

2015-2019　Bachelor’s degree in Department of Mathematical Engineering and Information Physics, School of Engineering, The University of Tokyo.
2019-2021　Master’s degree in Department of Mathematical Informatics, Graduate School of Information Science and Technology, The University of Tokyo
2021-2024　JSPS Research Fellow (DC1)
2021-2024　Ph.D. degree in Department of Mathematical Informatics, Graduate School of Information Science and Technology, The University of Tokyo
2024　Joined the National Institute of Advanced Industrial Science and Technology (AIST)

Specializes in theoretical cryptography and secure computation.

Papers（Selective）

• Keitaro Hiwatashi and Koji Nuida: Exponential Correlated Randomness Is Necessary in Communication-Optimal Perfectly Secure Two-Party Computation. ITC, pp.18:1-18:16, 2023
• Keitaro Hiwatashi and Koji Nuida: Explicit and Nearly Tight Lower Bound for 2-Party Perfectly Secure FSS. ACNS, pp.541-554, 2023
• Keitaro Hiwatashi and Koji Nuida: Correlated Randomness Reduction in Domain-Restricted Secure Two-Party Computation. IEICE Trans. Fundamentals Vol.107(3), pp.283-290, 2024
• Keitaro Hiwatashi, Satsuya Ohata, and Koji Nuida: An Efficient Secure Division Protocol Using Approximate Multi-Bit Product and New Constant-Round Building Blocks. IEICE Trans. Fundamentals, Vol.105-A(3), pp.404-416, 2022
• Keitaro Hiwatashi, Ken Ogura, Satsuya Ohata, and Koji Nuida: Accelerating Secure (2+1)-Party Computation by Insecure but Efficient Building Blocks. AsiaCCS, pp.616-627, 2021

Websites

• DBLP : https://dblp.uni-trier.de/pid/273/2496.html

Awards

• SCIS 2020, Paper Award
• CSS 2020, Student Paper Award