| 基于联盟链的医疗数据安全共享方案 |
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| 引用本文： | 周正强,陈玉玲,李涛,任晓军,卿欣艺.基于联盟链的医疗数据安全共享方案[J].应用科学学报,2021,39(1):123-134. |
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| 作者姓名： | 周正强 陈玉玲 李涛 任晓军 卿欣艺 |
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| 作者单位： | 1. 贵州大学 计算机科学与技术学院, 贵州 贵阳 550025;2. 贵州大学 公共大数据国家重点实验室, 贵州 贵阳 550025;3. 潍坊科技学院 农蔬区块链实验室, 山东 寿光 262700 |
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| 基金项目： | 国家自然科学基金（No.61962009）；贵州省科技重大专项计划基金（No.20183001）；贵州省公共大数据重点实验室开放课题基金（No.2018BDKFJJ005，No.2019BDKFJJ011）资助 |
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| 摘 要： | 基于区块链的医疗数据共享方案并未从时间维度进行访问控制。为解决这一问题，提出了一个基于联盟链的具有时间维度的医疗数据安全共享方案。首先，用云存储器存储医疗数据密文，以联盟链存储元数据，能实现医疗数据的安全存储与共享；其次，将智能合约和密文策略属性加密（ciphertext-policy attribute-based encryption，CP-ABE）技术相结合，设计数据安全共享协议，实现具有时间维度的细粒度访问控制。安全性分析及实验结果表明，该方案可以在安全存储医疗数据的同时实现具有时间维度的细粒度访问控制。
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| 关 键 词： | 医疗联盟链 属性基加密 安全存储 限时访问 智能合约 |
| 收稿时间： | 2020-11-12 |
Medical Data Security Sharing Scheme Based on Consortium Blockchain |
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| ZHOU Zhengqiang,CHEN Yuling,LI Tao,REN Xiaojun,QING Xinyi.Medical Data Security Sharing Scheme Based on Consortium Blockchain[J].Journal of Applied Sciences,2021,39(1):123-134. |
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| Authors: | ZHOU Zhengqiang CHEN Yuling LI Tao REN Xiaojun QING Xinyi |
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| Institution: | 1. College of Computer Science and Technology, Guizhou University, Guiyang 550025, Guizhou, China;2. State Key Laboratory of Public Big Data, Guizhou University, Guiyang 550025, Guizhou, China;3. Blockchain Laboratory of Agricultural Vegetables, Weifang University of Science and Technology, Shouguang 262700, Shandong, China |
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| Abstract: | The existing blockchain-based medical data sharing schemes perform access control without the consideration of time dimension. To solve this problem, this paper proposes a medical data security sharing scheme, based on consortium blockchain in consideration of time dimension to perform access control. Firstly, medical data ciphertext is stored in cloud storage, and the metadata is stored in the consortium blockchain, such that the medical data can be stored and shared safely. Secondly, by combining smart contract with ciphertext-policy attribute-based encryption (CP-ABE), a data security sharing protocol is designed to realize fine-grained access control with time dimension. The security analysis and experimental results show that this scheme could realize fine-grained access control with time dimension, besides ensuring the security of the stored medical data. |
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| Keywords: | medical consortium blockchain attribute-based encryption secure storage limited time access smart contract |
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