Blockchain-Based Privacy-Preserving Electronics Healthcare Records in Healthcare 4.0 Using Proxy Re-Encryption

Sharing patient data across health organizations is currently not secure, and doing so without mutual trust may result in data privacy violations. Through the implementation of Industry 4.0 principles, the whole ecosystem is advancing toward Healthcare 4.0. Periodic medical data sensing, aggregation, data transfer, data sharing, and data storage were the core components of Healthcare 4.0. The blockchain provides trust in the flow of patient medical information between health institutions. In this research, a permissioned blockchain network based on the Hyperledger Fabric architecture is built among patients and medical institutions to achieve secure and trustworthy data exchange for patients. Using the Hyperledger Fabric framework, blockchain can effectively handle electronic health records by combining the customized access-control method with asymmetric cryptography to remove inconsistency in data interchange. This work provides the results with different chaincodes and assesses Fabric’s performance as the number of chaincodes and peers grow.