基于区块链的电子医疗记录安全共享  

Blockchain-based electronic medical record secure sharing

作　　者：林超[1] 何德彪 黄欣沂[1] LIN Chao;HE Debiao;HUANG Xinyi(College of Computer and Cyber Security,Fujian Normal University,Fuzhou Fujian 350117,China;School of Cyber Science and Engineering,Wuhan University,Wuhan Hubei 430072,China)

机构地区：[1]福建师范大学计算机与网络空间安全学院,福州350117 [2]武汉大学国家网络安全学院,武汉430072

出　　处：《计算机应用》2022年第11期3465-3472,共8页journal of Computer Applications

基　　金：国家自然科学基金资助项目(62102089);中央高校基本科研业务费专项资金资助项目(2042021kf1030)。

摘　　要：针对电子医疗记录(EMR)共享面临的数据提供商集权化、患者数据管理显被动、互操作效率低、恶意传播等问题,提出一种基于区块链的电子医疗记录安全共享方法。首先,基于商用密码SM2数字签名算法提出一种更加安全高效的泛指定验证者签名证明(UDVSP)方案;然后,设计具有上传、验证、检索、撤销等功能的智能合约,构造基于区块链的电子医疗记录安全共享系统;最后,通过安全性分析和性能分析论证UDVSP方案和共享系统的可行性。安全性分析结果表明,所设计的UDVSP方案满足可证明安全性。性能评估结果表明,与现有常用的UDVSP/UDVS方案相比,节省至少87.42%的计算开销和93.75%的通信代价。区块链智能合约原型系统的仿真结果进一步论证了共享系统的安全性和高效性。To solve various issues faced by Electronic Medical Record(EMR)sharing,such as centralized data provider,passive patient data management,low interoperability efficiency and malicious dissemination,a blockchain-based EMR secure sharing method was proposed.Firstly,a more secure and efficient Universal Designated Verifier Signature Proof(UDVSP)scheme based on the commercial cryptography SM2 digital signature algorithm was proposed.Then,a smart contract with functionalities of uploading,verification,retrieval and revocation was designed,and a blockchain-based EMR secure sharing system was constructed.Finally,the feasibilities of UDVSP scheme and sharing system were demonstrated through security analysis and performance analysis.The security analysis shows that the proposed UDVSP is probably secure.The performance analysis shows that compared with existing UDVSP/UDVS schemes,the proposed UDVSP scheme saves the computation cost at least 87.42%and communication overhead at least 93.75%.The prototype of blockchain smart contract further demonstrates the security and efficiency of the sharing system.

关 键 词：电子医疗记录 区块链 SM2数字签名算法 泛指定验证者签名证明 数据共享 

分 类 号：TP309.[自动化与计算机技术—计算机系统结构]