区块链技术在电子病历共享的应用研究  

Research on the application of blockchain technology in the sharing of electronic medical records

作　　者：翟社平 汪一景 陈思吉 ZHAI Sheping;WANG Yijing;CHEN Siji(School of Computer Science and Technology,Xi’an University of Posts and Telecommunications,Xi’an 710121,China;Shaanxi Key Laboratory of Network Data Analysis and Intelligent Processing,Xi’an 710121,China)

机构地区：[1]西安邮电大学计算机学院,陕西西安710121 [2]陕西省网络数据分析与智能处理重点实验室,陕西西安710121

出　　处：《西安电子科技大学学报》2020年第5期103-112,共10页Journal of Xidian University

基　　金：国家自然科学基金(61373116);工业化和信息化部通信软科学项目(2018-R-26);陕西省教育厅科学研究计划(18JK0697);西安邮电大学研究生创新基金。

摘　　要：由于医疗数据的私密性和敏感性,数据共享和隐私保护是电子病历的关键问题。针对区块链的分散性和抗篡改性等特点,提出基于区块链的电子病历共享模型。首先,构建私有链和联盟链,分别存储用户加密的电子病历与电子病历安全索引记录。其次,提出分布式密钥生成技术与基于类型和身份的代理重加密方案相结合,设计了一种多中心的方案作为数据共享协议,采用委托权益证明算法选取代理节点。最后,对所提方案与现存方案从防篡改、抵抗攻击等多方面进行分析与评估。结果表明,该方案在通信开销与算力方面耗能较少,能有效地实现医疗数据之间的安全共享。Electronic health records contain the occurrence,development and treatment of patients′diseases,and have a high medical value.Due to the privacy and sensitivity of medical data,data sharing and privacy protection are key issues for electronic medical records.Aiming at the characteristics of decentralization and tamper resistance of the blockchain,an electronic medical record sharing model based on the blockchain is proposed.First,a private chain and an alliance chain are built to store the encrypted electronic medical and electronic medical′s security index records of users,respectively.Second,a combination of distributed key generation technology and a type and identity based proxy re-encryption scheme is proposed,and a multi-center scheme is designed as a data sharing protocol,which uses the entrusted-proof-of-rights-and-interests algorithm to select proxy nodes.Finally,an analysis and calculation of the proposed scheme and the existing scheme in various aspects such as tamper resistance and attack resistance are conducted.The result shows that the scheme consumes less energy in terms of communication overhead and computing power so that it can achieve the safe sharing of medical data effectively.

关 键 词：电子病历 数据共享 分布式密钥生成 区块链 代理重加密 

分 类 号：R197.323[医药卫生—卫生事业管理] TP311.13[医药卫生—公共卫生与预防医学]