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<p>Access control in healthcare is essential for ensuring secure and privacy-preserving data management, yet traditional centralized approaches are vulnerable to security breaches and inefficiencies. Blockchain-based access control offers a decentralized and transparent alternative; however, existing solutions suffer from high execution time, excessive gas consumption, and limited scalability. To address these limitations, this work proposes a Tag-Based Access Control (TBAC) framework using blockchain, where a tag score is dynamically computed for entities based on predefined attributes, and access is granted accordingly. This method enhances granularity and flexibility in access control while maintaining the immutability and security of blockchain. Experimental results demonstrate that the proposed system reduces execution time by 20.9%, lowers gas consumption by 13.8%, and improves scalability by 25%, making it a highly efficient solution for secure healthcare data management. The security analysis demonstrates the resilience of TBAC in healthcare 4.0 against various Sybil attacks, 51 % attacks, and Denial of Service (DoS) attacks through the proposed tag score.</p>

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A blockchain-based framework with cryptographic tags for healthcare security

  • 期刊论文

  • 发表日期：

    2025年4月10日

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  • Ashish Kumar,
  • Kakali Chatterjee

摘要

Access control in healthcare is essential for ensuring secure and privacy-preserving data management, yet traditional centralized approaches are vulnerable to security breaches and inefficiencies. Blockchain-based access control offers a decentralized and transparent alternative; however, existing solutions suffer from high execution time, excessive gas consumption, and limited scalability. To address these limitations, this work proposes a Tag-Based Access Control (TBAC) framework using blockchain, where a tag score is dynamically computed for entities based on predefined attributes, and access is granted accordingly. This method enhances granularity and flexibility in access control while maintaining the immutability and security of blockchain. Experimental results demonstrate that the proposed system reduces execution time by 20.9%, lowers gas consumption by 13.8%, and improves scalability by 25%, making it a highly efficient solution for secure healthcare data management. The security analysis demonstrates the resilience of TBAC in healthcare 4.0 against various Sybil attacks, 51 % attacks, and Denial of Service (DoS) attacks through the proposed tag score.