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A Blockchain-Enabled Multi-Authority Secure IoT Data-Sharing Scheme with Attribute-Based Searchable Encryption for

Fu Zhang¹, Xueyi Xia^1,2, Hongmin Gao^2,3,4

¹School of Cyberspace Security, Beijing University of Posts and Telecommunications, Beijing 100876, China.

Sensors (Basel, Switzerland)

|October 16, 2025

Summary

This summary is machine-generated.

This study introduces a secure blockchain-based data-sharing scheme for the Internet of Things (IoT). It enhances security and efficiency for intelligent systems by using multi-authority control and attribute-based searchable encryption.

Keywords:

Internet of Things attribute-based searchable encryption blockchain multi-authority security

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Area of Science:

Computer Science
Cybersecurity
Information Systems

Background:

The Internet of Things (IoT) is crucial for intelligent systems, driving digitalization across industries.
Exponential growth in IoT connections increases attack surfaces, overwhelming resource-constrained devices.
Existing data-sharing solutions struggle with IoT security, authorization, and authentication.

Purpose of the Study:

To propose a secure, efficient, and verifiable blockchain-based multi-authority IoT data-sharing scheme.
To address limitations of traditional data-sharing in cloud environments for IoT.
To enhance security and manageability in intelligent IoT systems.

Main Methods:

Developed a blockchain-based multi-authority scheme with attribute-based searchable encryption (BM-ABSE).
Utilized blockchain's immutability and smart contracts for data integrity and search reliability.
Offloaded decryption computations to the cloud to reduce IoT device burden.

Main Results:

The scheme decentralizes management, mitigating single-point failure risks.
Ensures data integrity and reliable search results through blockchain features.
Demonstrated static security and IND-CKA security requirements via theoretical analysis.
Experimental results show millisecond execution times on resource-constrained IoT devices.

Conclusions:

The proposed BM-ABSE scheme effectively enhances security, efficiency, and verifiability for IoT data sharing.
It provides robust defense against ciphertext and keyword tampering.
The scheme offers controllable performance overhead, even with increasing attributes.