Research On Medical Data Sharing Model Based On Blockchain And IPFS

In modern medical systems,patient data is generally stored in hospital databases and cloud storage.Due to the existence of hackers and malicious nodes,data maintenance in hospitals is very difficult,which leads to single point of failure and privacy leakage.In addition,patient data can only be transmitted and shared within the hospital,which can lead to treatment delays when patients need to be transferred externally from the hospital.In response to the slow data sharing and data leakage issues in modern medical systems,this article proposes a decentralized data sharing model based on blockchain and Interplanetary File System(IPFS).One is to propose a data sharing optimization strategy,which involves designing smart contracts to jointly encrypt the newly added medical data,upload the processed data to the IPFS system,and finally update patient identity information and hash addresses in blockchain nodes to ensure data security.Each hospital is then combined to form an interstellar file system for sharing and storing patient medical data,Improve data access efficiency;The second is to propose a decentralized identity authentication optimization strategy.In response to the problems of traditional public key infrastructure identity authentication centralization and low cost efficiency,verification nodes are designed in the blockchain to replace third-party institutions,and smart contracts are designed on the Ethereum platform to process user information on the chain,improving the security and timeliness of the identity authentication process.Finally,this paper deploys the development environment of the model,Ethereum alliance chain and IPFS,and completes the comparative experiment.The experimental results show that the P2 P technology transmission performance of IPFS is improved by 20% compared with HTTP(Hypertext Transfer Protocol)and FTP(File Transfer Protocol);Compared with the traditional centralized PKI authentication strategy,the decentralized identity authentication strategy has shorter average encryption time and higher efficiency.