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An Ethereum Blockchain Based Electronic Health Record System for Inter-Hospital Secure Data Sharing

Medical Records (MR) consisting of Personal Health Record (PHR), Electronic Health Record (EHR), dan Electronic Medical Record (EMR). Electronic Health Record (EHR) is a medical record that can be accessed and have certain limitations. The challenge in implementing MR is how to be able to collect, store, and analyze patient data in a comprehensive and integrated manner without having to violate patient privacy. The implementation of MR is how to transmit data between hospitals. To solve the problems and issues faced in implementing MR, there is a technology that can overcome this, one of which is using blockchain technology. Blockchain is a distributed ledger that managed by many participants in an availability manner. Ethereum is a blockchain platform that anyone can use to create and deploy decentralized applications that run on the blockchain network. The data stored on the Ethereum blockchain will always be there and can be seen as long as the blockchain network is still online. With ethereum, the process of sharing data will be easy to do using a computer belonging to the hospital as a blockchain node. The result of implementing blockchain into medical record is now the data can be shared securely between hospitals.