HA‐Med: A Blockchain‐Based Solution for Sharing Medical Data with Hidden Policies and Attributes
Xiaohui Yang, Jing Yi Liu · IET Information Security · 2024
Existing healthcare data‐sharing solutions often combine attribute‐based encryption techniques with blockchain technology to achieve fine‐grained access control. However, the transparency of blockchain technology may introduce potential risks of exposing access structures and user attributes. To address these concerns, this paper proposes a novel healthcare data‐sharing scheme called HA‐Med. By leveraging blockchain technology, HA‐Med ensures the concealment of access policies and attributes, providing a secure solution for fine‐grained access control of medical data. Furthermore, the scheme supports attribute revocation and forward secrecy to enhance user privacy. The security of HA‐Med is rigorously verified through theoretical analysis, and its feasibility is demonstrated through experiments conducted using the Java‐based JPBC library.