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A Blockchain-Based Secure Data Transaction and Privacy Preservation Scheme in IoT System.

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This study introduces a blockchain framework for secure Internet of Things (IoT) data sharing. It enhances privacy protection and access control for massive IoT devices using attribute-based encryption and homomorphic encryption.

Keywords:
IoTattribute-based encryptionblockchaindata tradinghomomorphic encryptionprivacy protection

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Area of Science:

  • Computer Science
  • Cybersecurity
  • Data Science

Background:

  • The proliferation of Internet of Things (IoT) devices generates vast amounts of heterogeneous data, posing significant challenges for secure transactions and data sharing.
  • Key issues include limited device resources, untrustworthy networks, sensitive user privacy, and data silos, hindering effective data circulation.
  • Achieving fine-grained access control and privacy protection for massive IoT devices is a critical, urgent problem in the IoT field.

Purpose of the Study:

  • To propose a novel blockchain-based framework for secure data transaction and privacy protection in the Internet of Things (IoT).
  • To address the challenges of massive data generation, heterogeneous devices, and sensitive information within IoT ecosystems.
  • To ensure secure and reliable data circulation while maintaining fine-grained access control and user privacy.

Main Methods:

  • A multi-layer security architecture integrating blockchain and InterPlanetary File System (IPFS), tailored for the end-edge-cloud characteristics of IoT.
  • A data sharing mechanism employing attribute-based encryption (ABE) for dynamic, fine-grained access control and a game theory-driven dynamic pricing model for interest balancing.
  • A secure computing scheme utilizing CKKS fully homomorphic encryption for confidential statistical analysis of encrypted sensor data.

Main Results:

  • The proposed framework demonstrates security under standard cryptographic assumptions and resilience against common IoT attacks.
  • Prototype system testing confirmed the functional completeness and performance feasibility of the solution.
  • The scheme effectively addresses data integrity, verifiable transactions, and fine-grained access control, reducing reliance on central authorities.

Conclusions:

  • The blockchain-based framework provides a comprehensive technical solution for secure IoT data sharing and privacy protection.
  • It enables efficient and secure data circulation, access control, and confidential analysis in complex IoT environments.
  • The integration of blockchain, IPFS, ABE, and homomorphic encryption offers a robust approach to mitigating IoT data challenges.