Keng-Yu Chen (陳耕宇)

PhD Student

École Polytechnique Fédérale de Lausanne

About

Keng-Yu (Gary) Chen is now a PhD student in Computer and Communication Sciences at the LASEC lab at École Polytechnique Fédérale de Lausanne. He received his master’s degree in Computer Science from the Graduate Institute of Electrical Engineering, National Taiwan University.

Interests

Theoretical View on Cryptographic Constructions
Biometric Authentication
Functional Encryption
Side-channel Analysis

Education

PhD Student in Computer and Communication Sciences
School of Computer and Communication Sciences, École Polytechnique Fédérale de Lausanne
MS in Computer Science, 2024
Graduate Institute of Electrical Engineering, National Taiwan University
BS in Computer Science and Information Engineering, 2022
Department of Computer Science and Information Engineering, National Taiwan University
BSc in Mathematics, 2022
Department of Mathematics, National Taiwan University

Technical Skills

Python

C/C++

ChipWhisperer

A Toolchain for Side-Channel Analysis

Personal Hobbies

Photography (Follow my Instagram)

Piano

J-Pop Music

Featured Publications

Keng-Yu Chen (陳耕宇), Ming Qing Ching, Jiun-Peng Chen, Bo-Yin Yang

April, 2026 TCHES

When Masking Multiplication Isn’t Enough: Exploiting Floating-Point Leakage in Falcon’s Pre-Image Computation

In this paper, we provide an improved side-channel attack on the pre-image computation of Falcon. Our attack targets the implementation that only protects the floating-point multiplication. We show that protecting floating-point multiplication alone is insufficient to defend Falcon against side-channel attacks.

Keng-Yu Chen (陳耕宇), Jiun-Peng Chen

January, 2024 IACR Transactions on Cryptographic Hardware and Embedded Systems (TCHES)

Masking Floating-Point Number Multiplication and Addition of Falcon

In this paper, we provide the first masking scheme for floating-point number multiplication and addition to defend against recent side-channel attacks on Falcon’s pre-image vector computation.