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Updated: May 15, 2025

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A secure and scalable IoT access control framework with dynamic attribute updates and policy hiding.

Zhigang Xu1, Wan Zhou1, Hongmu Han2

  • 1School of Computer Science, Hubei University of Technology, 28 Nanli Road, Wuhan, 430068, China.

Scientific Reports
|April 8, 2025
PubMed
Summary

This study introduces a new bidirectional attribute access control scheme for Internet of Things (IoT) data. It enhances security and privacy through dynamic attribute updates and policy hiding, improving upon existing blockchain-based methods.

Keywords:
Attribute-based encryption (ABE)Bidirectional attribute access controlDynamic updateInternet of Things (IoT)Policy hiding

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Area of Science:

  • Computer Science
  • Information Security
  • Blockchain Technology

Background:

  • Internet of Things (IoT) data security is crucial, often relying on cloud computing and attribute-based encryption (ABE).
  • Existing blockchain-based access control methods lack dynamic updates, two-way verification, and secure data transmission capabilities.
  • Public access policies in current systems compromise user privacy and data security.

Purpose of the Study:

  • To propose a novel attribute-based encryption scheme for secure and real-time data sharing in IoT environments.
  • To address limitations in dynamic attribute updates and policy visibility in blockchain-based access control.
  • To enhance the security and privacy of IoT data through a bidirectional verification process.

Main Methods:

  • Designed a dynamic update and policy hiding bidirectional attribute access control (DUPH-BAAC) scheme.
  • Implemented a strategy hiding technique for secure policy transmission.
  • Utilized blockchain for decentralized identity authentication, authorization, and key management.
  • Employed smart contracts for user permission verification and access transaction generation.

Main Results:

  • The DUPH-BAAC scheme enables real-time secure sharing with dynamic attribute updates and hidden access policies.
  • Blockchain replaces centralized IoT servers, reducing information leakage risks.
  • The scheme successfully resists indistinguishable choice access structures and selective plaintext attacks.
  • Achieved IND-sAS-CPA security, ensuring robust data protection.

Conclusions:

  • The DUPH-BAAC scheme offers a secure and efficient solution for IoT data access control.
  • Policy hiding and bidirectional verification significantly enhance user privacy and data integrity.
  • Decentralization via blockchain improves the overall security posture of IoT systems.