Planning Manager, Strategic Planning Office, Strategic Planning Department, and
Research Manager, Security Fundamentals Laboratory, Cybersecurity Research Institute,
National Institute of Information and Communications Technology.
4-2-1, Nukui-Kitamachi, Koganei, Tokyo 184-8795, Japan.
ABOUT
Biography
I received a B.E. from the National Defense Academy of Japan in 2009, an M.S. from the Japan Advanced Institute of Science and Technology in 2015, and a Ph.D. in engineering from Osaka University in 2019.
From 2009 to 2020, I served in the Japan Air Self-Defense Force under the Ministry of Defense. I joined the National Institute of Information and Communications Technology (NICT) as a Senior Researcher in 2020. I currently serve as a Planning Manager in the Strategic Planning Office and a Research Manager in the Security Fundamentals Laboratory.
My research interests include the cryptanalysis and design of symmetric-key ciphers, as well as the security analysis of real-world systems, particularly messaging applications and video conferencing systems that employ end-to-end encryption.
UPDATES
News
A journal paper titled “Generalizing Bit-based Rebound Attacks on AES-like Hashing” has been accepted for publication in IACR Communications in Cryptology.
An international conference paper titled “Finding Collision for HMAC-SHA Forgery in the Secret-State Setting” has been accepted to ASIACRYPT 2026.
An international conference paper titled “Accelerated Differential Search for Gleeok Using Hamming-Weight-Guided SAT Solving” has been accepted to CANS 2026.
An international conference paper “Refining the Evaluation of Diffusion Property for Simon Variants” has been accepted to ISITA 2026.
Two international conference papers titled “Automated Tool for Finding Practical Collisions on SPN-based Hash Functions” and “Analyzing Forgery Security of LeMac: Tight Bounds and Impact of Padding” have been accepted to ACISP 2026.
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A talk titled “Payload Compromised: Full Key Recovery in Rocket.Chat E2EE” has been accepted in presentation at Black Hat Asia 2026 Briefings.