SDACS: Blockchain-Based Secure and Dynamic Access Control Scheme for Internet of Things

Area of Science:

• Computer Science
• Information Security
• Distributed Systems

Background:

• The Internet of Things (IoT) generates massive data, necessitating reliable sharing for smart applications.
• Traditional centralized data sharing faces single points of failure, low reliability, and opaque access.
• Existing schemes struggle with the dynamic and decentralized nature of IoT environments.

Purpose of the Study:

• To propose a secure and dynamic access control scheme (SDACS) for decentralized IoT data sharing.
• To enable auditable and reliable fine-grained access control for data owners.
• To address the limitations of traditional centralized data sharing in IoT.

Main Methods:

• Implemented attribute-based control (ABAC) with Hyperledger Fabric and InterPlanetary File System (IPFS).
• Deployed four access control contracts on blockchain for policy coordination and implementation.
• Developed a lightweight, certificateless authentication protocol for secure identity management and data transmission.

Main Results:

• The proposed SDACS scheme provides decentralized and fine-grained access control for IoT data.
• It ensures double-layer data protection through off-chain authentication and secure message transmission.
• Experimental analysis confirmed high throughput, security, and stability in IoT data sharing.

Conclusions:

• SDACS effectively addresses the security and reliability challenges in IoT data sharing.
• The scheme offers a robust solution for decentralized, auditable, and fine-grained access control.
• It promotes the intelligence and trustworthiness of IoT ecosystems.