一种基于区块链的大健康数据存储和共享模型  

Big Health Data Storage and Sharing Model Based on Blockchain

作　　者：万征[1] 丁超 余岚[2] 李彦 胡佳鑫[1] WAN Zheng;DING Chao;YU Lan;LI Yan;HU Jia-xin(College of Information Management,Jiangxi University of Finance and Economics,Nanchang 330032,China;College of Sports,Jiangxi University of Finance and Economics,Nanchang 330032,China;School of Information Engineering,Nanchang Institute of Technology,Nanchang 330099,China)

机构地区：[1]江西财经大学信息管理学院,南昌330032 [2]江西财经大学体育学院,南昌330032 [3]南昌工程学院信息工程学院,南昌330099

出　　处：《小型微型计算机系统》2023年第3期636-645,共10页Journal of Chinese Computer Systems

基　　金：国家自然科学基金项目(61961021)资助;江西省教育厅科学技术研究重点项目(GJJ180251)资助;江西财经大学2020年度研究生创新专项资金个人项目(24)资助;江西财经大学第十六届学生科研课题(20210917221641654)资助。

摘　　要：针对各类机构健康数据共享困难、用户隐私保护不力等问题,提出一种基于区块链的大健康数据存储和共享模型,实现居民健康数据的安全存储和共享.为了处理跨链交易数据,保证数据跨域流转过程中的安全性、完整性、一致性,提出基于联盟链的双链网络模型.其中,联盟链存储数据的hash摘要、存储地址、关键字密文;大健康联盟链存储数据跨域访问记录,并利用代理重加密技术对跨域数据进行重加密操作.为了防止节点共谋并提高共识效率和模型容错率,设计一种基于节点信誉的当值节点选择方案.通过安全性分析和仿真实验得出方案的安全性与高效性,证明其适用于大健康数据存储和共享模型.In view of the difficulties in sharing health data of various institutions and the inadequate protection of user privacy, a blockchain-based big health data storage and sharing model is proposed to realize the safe storage and sharing of residents’ health data.In order to process cross-chain transaction data and ensure the security, integrity and consistency of the cross-domain transfer of data, a dual-chain network model based on the alliance chain is proposed.Furthermore, the alliance chain stores the hash summary, storage address, and keyword cipher text of the data, and the big health alliance chain stores data cross-domain access records which uses one-way multi-hop re-encryption technology to re-encrypt the cross-domain data.Due to prevent node collusion and improve the consensus efficiency and model fault tolerance, a node selection scheme based on node reputation is designed.The safety and efficiency of the scheme are obtained through safety analysis and simulation experiments, which is proved that it is suitable for the big health data storage and sharing model.

关 键 词：大健康 区块链 节点信誉 跨域共享 代理重加密 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]