BSSPD: A Blockchain-Based Security Sharing Scheme for Personal Data with Fine-Grained Access Control

This paper introduces a Blockchain-based Security Sharing Scheme for Personal Data (BSSPD), addressing the critical issues of security and privacy in the era of AI-driven data governance. Leveraging the combined strengths of Blockchain, Ciphertext-Policy Attribute-Based Encryption (CP-ABE), and the InterPlanetary File System (IPFS), the proposed scheme empowers data owners with fine-grained access control over their shared data. Data encryption and storage on IPFS maximize decentralization, while CP-ABE ensures secure access through attribute-based encryption. Blockchain is utilized for publishing data-related information and distributing decryption keys to authorized users, eliminating the reliance on third-party Cloud Service Providers. BSSPD supports attribute-level revocation and employs ciphertext keyword search to enhance data user privacy. The implementation involves the creation of a Smart Contract using Solidity, providing robust user registration and attribute management functionalities for secure data sharing.

Keywords:

Blockchain, CP-ABE, IPFS, Data Sharing, Security, Privacy, Smart Contract, Attribute-Based Encryption, Fine-Grained Access Control.