Design And Implementation Of Electronic Medical Record System Based On Blockchain

With the development of the times,from the original paper storage to the current cloud server storage,the medical record system is constantly updated.In order to solve the problems of easy data leakage and difficult information sharing caused by the current centralized storage methods,a blockchain-based electronic medical record sharing scheme is proposed.Realize the sharing of electronic medical records of patients under the premise of ensuring the safety of medical data and not infringing on the privacy of patients.The main work is as follows:1)Use a system model combining consortium chain and private chain.The ciphertext of the patient’s medical records is stored on the database of the medical institution server.Medical institutions build their own private chain to store the storage location of the ciphertext and the hash value of the ciphertext.Medical institutions and insurance companies build a consortium chain to store the identification of medical institutions and private chain block identification.2)Study the storage mechanism of the transaction chain.Drawing lessons from the advantages of the blockchain chain structure,construct the chain structure of transactions in the block.It solves the problem of difficulty in positioning the data traceability of the existing chain storage structure due to the disorder of transactions in the block,and realizes the fast traceability of the operation record under the condition of huge amount of node data,and realizes the blockchain Efficient accountability.3)Explain the storage model and data search model of the electronic medical record system.Analyze the process of storing and obtaining medical records.Analyze the existing problems of the current electronic medical record system and the design goals.Analyze related technologies from two aspects: blockchain design and cryptographic security.Finally,an electronic medical record system based on blockchain is designed and implemented,and its performance is tested and analyzed.