Associate Professor ยท Graduate School of Informatics, Nagoya University
Research project
We combine IoT devices with blockchain and smart contracts so that device permissions, data sharing, and lifecycle management can be handled in a transparent way.
Detail
Network-connected devices are now used in many places, from homes to factories and vehicles. Some of these devices are managed by trained professionals, while others are operated by ordinary users.
For professional systems, maintenance and lifecycle management are often organized as part of a business process. For consumer IoT devices, however, users are usually expected to rely on manuals and software updates to keep devices secure.
Detail
In many cases, users do not clearly see how device logs, sensor data, and operational information are collected and reused. Manufacturers may use such data for monitoring or AI training, while users themselves often have little control or access.
Even when users want to share or use their own device data, the necessary interfaces and permissions are often unclear or unavailable.
Detail
We are developing a software framework that combines IoT devices with Web3 technologies such as blockchain and smart contracts. The goal is to automate device lifecycle management and data sharing in a verifiable way.
Users can grant permissions to manufacturers or third parties, and those permissions are recorded and enforced through smart contracts. By leaving a trace of agreements on the blockchain, the framework improves transparency and accountability.
Related publications
Yuxiao Wu, Yutaka Matsubara, Shoji Kasahara, Electronics, Vol.14, Issue 14, 2025.
Luyonghe Li, Yuichiro Yasue, Yutaka Matsubara, B4TI at BCCA 2025, Croatia, Oct 2025.
Yuxiao Wu, Kenta Kawai, Yutaka Matsubara, BCCA 2025, Croatia, Oct 2025.
Kenta Kawai, Yuxiao Wu, Yutaka Matsubara, Hiroaki Takada, BRAIN 2025 at PerCom 2025, Washington D.C., Mar 2025.
Akari Sasaki, Ryo Kurachi, Yutaka Matsubara, Hiroaki Takada, CCNC 2026, Las Vegas, Jan 2026.
Hiromasa Ito, Yutaka Matsubara, Hiroaki Takada, WSSE 2024, Kyoto, Aug 2024.
Hiromasa Ito, Yutaka Matsubara, Hiroaki Takada, ENASE 2023, Prague, pp.273-282, Apr 2023.
Ryota Nakanishi, Yutaka Matsubara, Hiroaki Takada, DICOMO 2022. Excellent Paper Award.
Hiromasa Ito, Yutaka Matsubara, Hiroaki Takada, IPSJ Journal, Vol.62, pp.877-890, 2021.
Wufei Wu, Ryo Kurachi, Gang Zeng, Yutaka Matsubara, Hiroaki Takada, Renfa Li, Keqin Li, IEEE Access, Vol.6, pp.54607-54623, 2018.
Related themes
We study how to keep mixed-criticality systems fast, predictable, and safe even when many applications share CPUs, memory, storage, and networks.
We study large socio-technical systems where many independent systems and people interact, and we develop ways to explain and improve safety, security, and resilience over time.