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Related Experiment Video

Updated: Dec 25, 2025

Setup of Consumer Wearable Devices for Exposure and Health Monitoring in Population Studies

Setup of Consumer Wearable Devices for Exposure and Health Monitoring in Population Studies

Published on: February 3, 2023

Exploiting Smart Contracts for Capability-Based Access Control in the Internet of Things.

Yuta Nakamura¹, Yuanyu Zhang¹, Masahiro Sasabe¹

¹Graduate School of Science and Technology, Nara Institute of Science and Technology, 8916-5 Takayama-Cho, Ikoma, Nara 630-0192, Japan.

Sensors (Basel, Switzerland)

|March 28, 2020

Summary

We propose a decentralized Capability-Based Access Control (CapBAC) scheme using Ethereum smart contracts for enhanced IoT security. This novel approach offers more flexible and granular access control compared to existing methods.

Keywords:

Capability-Based Access Control (CapBAC)Ethereum Blockchain Internet of Things

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Last Updated: Dec 25, 2025

Setup of Consumer Wearable Devices for Exposure and Health Monitoring in Population Studies

Setup of Consumer Wearable Devices for Exposure and Health Monitoring in Population Studies

Published on: February 3, 2023

Area of Science:

Computer Science
Cybersecurity
Blockchain Technology

Background:

The proliferation of Internet of Things (IoT) devices necessitates robust security measures against unauthorized access.
Traditional access control methods struggle with the distributed and untrusted nature of IoT environments.
Capability-Based Access Control (CapBAC) offers a promising solution for managing access rights.

Purpose of the Study:

To propose a decentralized and trustworthy CapBAC scheme for IoT systems.
To leverage Ethereum smart contract technology for secure and efficient access control.
To enhance fine-grained control and flexibility in capability delegation.

Main Methods:

Developed a CapBAC scheme utilizing Ethereum smart contracts, with each object having a dedicated smart contract.
Implemented a token management system based on access rights/actions rather than subjects.
Deployed and tested the scheme on a private Ethereum blockchain network.

Main Results:

The proposed CapBAC scheme demonstrates feasibility and effectiveness in a simulated IoT environment.
The scheme achieves more fine-grained and flexible capability delegation compared to subject-unit management.
Performance comparison shows comparable monetary cost to existing schemes (BlendCAC) with superior flexibility, granularity, and consistency.

Conclusions:

The novel CapBAC scheme provides a decentralized, trustworthy, and flexible access control solution for IoT.
Smart contract-based token management offers significant advantages for IoT security.
The proposed approach enhances security and usability in distributed IoT ecosystems.