Associate Professor · Graduate School of Informatics, Nagoya University
Research project
We combine Internet of Things (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 Internet of Things (IoT) devices, however, users are usually expected to rely on manuals and software updates to keep devices secure.
Detail
Device logs, sensor readings, and operational data are often collected and reused without the owner clearly seeing how. Manufacturers may put such data to use for monitoring or AI training, while the users themselves have little control or access.
Even when owners do want to share or reuse data from their own devices, the interfaces and permissions needed to do so are frequently unclear or simply not available.
Detail
We are developing a software framework that combines Internet of Things (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 Systems of Systems (SoS — arrangements in which multiple independent systems cooperate to achieve an emergent purpose) as socio-technical systems in which autonomous actors interact, and we aim to establish engineering methods for designing their overall behavior.