Abstract
Abstract— Years of heavy regulation and bureaucratic ineffificiency have slowed innovation for electronic medical records (EMRs). We employ a security risk management (SRM) domain model and a methodology to investigate two security risks – Sybil and Double-spending – that have been identified and are regarded the most significant security issues in blockchain systems. We tested a newly developed framework by looking at the hazards of Sybil and Double-spending in Ethereum-based healthcare apps. MedRec thus enables the emergence of data economics, supplying big data to empower researchers while engaging patients and providers in the choice to release metadata. Finally, we deploy the MIStore on the Ethererum blockchain and give the corresponding performance evaluation. We wrap off the study by laying out our plans for developing an ontology-based blockchain security reference model. Keywords— Sybil risk, Double-spending risk, Ethereum-based healthcare apps, Electronic medical records, big data
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