A secure interoperable method for electronic health records exchange on cross platform blockchain network

An Electronic Health Record (EHR) store essential and sensitive patient's medical information. Since health information is highly confidential data, it should be accessible with the consent of the patient. Blockchain based EHR management system offers improvised privacy and patient- centric approach. HR management systems are available with multiple blockchain platforms. Generally, EHRs are maintained at several independent blockchain platforms. EHR management systems should be capable of securely exchange data on cross platform blockchain network. The interoperability in such blockchain platforms should facilitate seamless cross-chain interaction and information eichange. This article proposes a method that facilitates secure EHR exchange on Ethereum and Hyperledger fabric network using hepatitis dataset. The key contributions of the proposed method include: Hash lock based interoperable cross-chain method for EHR exchange across Ethereum and Hyperledger fabric. Additional security to the EHR is ensured by partitioning EHR as on-chain (blockchain plat- form) and off-dhain InterPlanetary File System (IPFS) Secure Password Authentication-Based Key Exchange (SPAKE) based session management for EHR exchange across two parties. The proposed patient centric method is validated to ensures the successful exchange of patient EHR across Etheream and Hyperledger fabric.