关键词: 区块链, 医疗数据, 安全, 授信, 隐私保护

Abstract: With the deepening development of the trend of open and shared data, issues such as low matching between data demand and supply, weak protection of data security and personal privacy, and imperfect mutual trust mechanisms between medical institutions are becoming increasingly prominent. In this paper, the “onestop” expense settlement scenario of Medicaid was taken as the application research object, the traceability and audit of medical data were strengthened based on blockchain technology, secure exchange was implemented by extracting shared data definitions, access control of medical data was  implemented based on attribute encryption technology, and personal privacy data protection was strengthened by using privacy computing model, data hierarchical credit and other means, automatic, efficient, and secure data sharing was realized through smart contract management and control of data sharing mechanisms. Based on the security system architecture of blockchain, this paper strengthened the elements of “compliance”, “credit”, “security”, “privacy”, and promotes the global security and compliance of medical data sharing through the integration of business requirements and data security compliance.

Key words: blockchain;medical data;security, credit;privacy protection