Building Secure and Decentralized EHR Systems with Blockchain and Smart Contracts

This paper proposes a method for managing electronic health records (EHRs) using blockchain technology. The system architecture consists of a decentralized network, smart contracts, and data models. Blockchain enables secure storage and access of EHRs by multiple parties while smart contracts define rules for accessing and updating EHR data. The method involves designing a decentralized database, setting up a blockchain network, developing smart contracts, implementing security and privacy measures, and designing user interfaces. The paper provides equations to model the blockchain network, and smart contracts are defined based on conditions for stakeholders and preconditions for actions. A smart contract determines whether an action is permitted for a stakeholder based on their conditions and action preconditions.