基于区块链的医疗记录安全共享方案

A Secure Medical Record Sharing Scheme Based Blockchain

目前电子医疗记录存放在不同的医院中,这阻碍了患者医疗数据的共享并使患者的隐私面临严重威胁。提出了一种基于区块链的医疗记录安全共享方案SMRSBC。在SMRSBC中,原始的EMR被安全地存放在云存储服务器中,索引被保留在防篡改联盟区块链中。这样可以大大降低医疗数据泄露的风险,同时,区块链中的索引确保了EMR不能被任意修改。通过患者的预定义访问权限,可以通过区块链的智能合约自动完成电子医疗记录的安全共享。此外,在患者的电子医疗记录存储和提取阶段采用非对称加密技术,能够很好的保护患者的隐私。SMRSBC能够实现EMR安全有效的共享,并且能保证病人的隐私不被泄露。

Electronic medical records are vital and highly sensitive private information in medical data and need to be shared frequently between hospitals.Sharing medical data is considered a key method to improve the quality of medical services and reduce medical costs.However,electronic medical records are currently stored in different hospitals,which hinders the sharing of patient medical data and poses a serious threat to patient privacy.In order to solve these problems,a secure medical record sharing scheme based blockchain(SMRSBC)is proposed.In SMRSBC,the original EMR is securely stored in the cloud storage server,and the index is kept in the tamper-resistant alliance blockchain.This means that the risk of medical data leakage can be greatly reduced,and at the same time,the index in the blockchain ensures that the EMR cannot be arbitrarily modified.Through the patient's predefined access rights,the secure sharing of electronic medical data can be automatically completed through smart contracts on the blockchain.In addition,the use of elliptic curve encryption and asymmetric encryption technology in the patient's electronic medical data storage and extraction phases can protect the patient's privacy well.Analysis shows that SMRSBC is a safe and effective method to realize EMR data sharing.