Medical health data sharing scheme based on blockchain and attribute-based encryption

With the development of medical digitization, smart medical care and medical big data technologies, secure storage and sharing of medical data have become the hotspot of research in the field of medical technology. However, Fragmentation of medical data is much more serious, and many data becomes data islands that are difficult to apply to medical research. At the same time, the centralized control of medical data by third-party institutions has security bottlenecks and performance bottlenecks, which also lead to frequent data leakage incidents. To solve this problem, we propose a medical health data sharing scheme based on blockchain and attribute-based encryption. The model implements decentralized, tamper-proof, traceable data sharing based on a distributed blockchain system. And an attribute-based encryption is used to protect the privacy of patient's medical data. The cryptographic method is used to implement fine-grained access control of the data. The model can reduce the cost of data sharing and improve the efficiency of data utilization while protecting the data security. Finally, compared with the existing medical data sharing methods, our model has certain advantages and good scalability in some aspects.