A Blockchain-Powered Security Exchange For Individual Information With Detailed Access Management

Abstract

In the AI-driven era, safeguarding privacy while enabling open data sharing is paramount. Existing datasharing
solutions rely heavily on cloud servers, raising concerns about data ownership, security, and privacy.
While encryption and access control mitigate some risks, dependence on Cloud Service Providers (CSPs)
remains a challenge. To address this, we propose BSSPD, a blockchain-based security sharing scheme for
personal data. BSSPD integrates blockchain, ciphertext-policy attribute-based encryption (CP-ABE), and
InterPlanetary File System (IPFS) to maximize decentralization. Data owners encrypt and store data on IPFS,
while CP-ABE encrypts access keys based on specific policies. Blockchain facilitates data owner authentication
and key distribution. Fine-grained access control and attribute-level revocation enhance security without
compromising usability. Ciphertext keyword search protects data user privacy during retrieval. Security
analysis and EOS blockchain simulations demonstrate BSSPD's feasibility and performance. Our approach
offers a robust solution to the challenges of data governance in the AI era, empowering users with greater
control over their personal data while ensuring security and privacy