A Decentralized System for Integrating Electronic Health Records (EHR) and Personal Health Records (PHR) Using Ethereum Smart Contracts and IPFS

This paper proposes and implements a decentralized framework for integrating Electronic Health Records (EHR) and Personal Health Records (PHR) using Ethereum smart contracts and the Interplanetary File System (IPFS). The system encrypts patient data, stores it off-chain on IPFS, and records immutable Content Identifiers (CIDS) on the Ethereum blockchain for access control and integrity verification [۱, ۲]. Dedicated IPFS nodes ensure high availability and further reduce storage costs compared to traditional cloud or on-chain solutions [۳, ۶]. The primary innovation is the simultaneous integration of PHR (patient-managed data) and EHR (provider-managed data) - a combination rarely addressed in existing literature - while leveraging IPFS as a decentralized, content-addressed storage layer [۷, ۹]. Evaluation results show effective data upload/retrieval, strong resistance to unauthorized access, significant cost savings, and improved transparency and resilience against single-point failures [۴, ۵]. This approach provides a scalable, patient-centric, and secure model for next-generation digital health systems.

کلیدواژه ها:

PHR ، EHR ، Blockchain ، IPFS ، Smart Contract ، Decentralized Storage