Research on Blockchain-Based Privacy Data Storage and Sharing Scheme

This paper presents a novel blockchain-based privacy data storage and sharing scheme, which leverages the immutability, decentralization, and transparency of blockchain to ensure data integrity and traceability. The proposed system utilizes Pedersen’s secret sharing method to split encryption keys into multiple shares, distributed across different cloud servers, to prevent single-point failures and unauthorized access. Additionally, an Attribute-Based Access Control (ABAC) mechanism is integrated with smart contracts to enforce fine-grained, dynamic access policies. This system provides a solution for secure, scalable, and efficient data management in the digital age, ensuring that sensitive information remains confidential while allowing controlled and verifiable sharing between authorized parties. Experimental validation shows that the system achieves low latency for access policy queries and maintains high security and immutability through blockchain storage.