Design and Implementation of a Secure Interoperable EHR System Using Ethereum, Hyperledger Fabric, and Decentralized IPFS Storage
DOI:
https://doi.org/10.26438/ijcse/v13i11.2936Keywords:
Blockchain, Electronic Health Records, GDPR Compliance, Ethereum, Hyperledger Fabric, IPFS, Interoperability, Smart Contracts, Healthcare Data PrivacyAbstract
The rapid growth of digital healthcare has increased the demand for electronic health record (EHR) systems that ensure secure data exchange, strong privacy controls, and seamless interoperability across institutions. Traditional EHR platforms depend heavily on centralized storage a infrastructure, which exposes sensitive medical information to security breaches, system failures, and limited patient oversight. These limitations also make compliance with data protection regulations, including the General Data Protection Regulation (GDPR), difficult to achieve. This research presents an interoperable EHR management framework built on a hybrid blockchain architecture that integrates Ethereum for transparent and immutable verification, Hyperledger Fabric for permissioned and institution-level control, and the InterPlanetary File System (IPFS) for efficient decentralized storage of encrypted medical files. Smart contracts automate critical operations such as consent authorization, access auditing, and cryptographic key revocation to support GDPR-aligned data governance. The system is implemented through a Django backend and a React.js interface, enabling secure and intuitive interaction for patients and healthcare professionals. Experimental evaluation demonstrates reduced on-chain storage, improved access transparency, and stable transaction latency, confirming the suitability of the proposed framework for scalable and regulation-compliant healthcare data exchange.
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