区块链电子病历中基于密钥聚合的密文检索方案

doi:10.19678/j.issn.1000-3428.0059641

计算机工程 ›› 2021, Vol. 47 ›› Issue (5): 36-43. doi: 10.19678/j.issn.1000-3428.0059641

区块链电子病历中基于密钥聚合的密文检索方案

牛淑芬¹, 韩松¹, 于斐¹, 王彩芬², 杜小妮³

1. 西北师范大学计算机科学与工程学院, 兰州 730070;
2. 深圳技术大学大数据与互联网学院, 广东深圳 518118;
3. 西北师范大学数学与统计学院, 兰州 730070

收稿日期:2020-10-04 修回日期:2020-11-16 发布日期:2021-05-11
作者简介:牛淑芬(1976-),女,副教授、博士,主研方向为网络隐私保护、云计算;韩松、于斐,硕士研究生;王彩芬、杜小妮,教授、博士。
基金资助:
国家自然科学基金（61562077，61662069，61662071，61772022）。

Ciphertext Retrieval Scheme Based on Key Aggregation for Electronic Medical Record on Blockchain

NIU Shufen¹, HAN Song¹, YU Fei¹, WANG Caifen², DU Xiaoni³

1. College of Computer Science and Engineering, Northwest Normal University, Lanzhou 730070, China;
2. College of Big Data and Internet, Shenzhen Technology University, Shenzhen, Guangdong 518118, China;
3. College of Mathematics and Statistics, Northwest Normal University, Lanzhou 730070, China

Received:2020-10-04 Revised:2020-11-16 Published:2021-05-11

摘要/Abstract

摘要： 为实现对多个电子病历文件的密文检索，提出一种基于密钥聚合的密文检索方案。当数据用户对多个文件进行搜索时，利用密钥聚合技术生成一个聚合陷门即可实现对多个文件的批量搜索。当数据用户检索得到医疗云服务返回的文件时，通过区块链中的智能合约技术完成检索数据的完整性和正确性验证。分析结果表明，该方案满足聚合密钥、陷门和关键字隐私安全需求，在数据加密阶段和关键字搜索阶段相比现有方案具有更高的检索效率。

关键词: 区块链, 电子病历, 密钥聚合, 密文检索, 智能合约

Abstract: This paper proposes a ciphertext retrieval scheme based on key aggregation for the ciphertext retrieval of Electronic Medical Record(EMR).Leveraging the technique of key aggregation,the scheme generates an aggregation trapdoor for the batch search of multiple files when it is requested by data users.After the medical cloud service returns the files,the integrity and correctness of retrieved data is verified by using the smart contract technology in blockchain.Analysis results show that the scheme satisfies the privacy security requirements of key aggregation,trapdoors and keywords,and has higher efficiency than the existing schemes during data encryption and keyword search.

Key words: blockchain, Electronic Medical Record(EMR), key aggregation, ciphertext retrieval, smart contract

中图分类号:

TP309.7

牛淑芬, 韩松, 于斐, 王彩芬, 杜小妮. 区块链电子病历中基于密钥聚合的密文检索方案[J]. 计算机工程, 2021, 47(5): 36-43.

NIU Shufen, HAN Song, YU Fei, WANG Caifen, DU Xiaoni. Ciphertext Retrieval Scheme Based on Key Aggregation for Electronic Medical Record on Blockchain[J]. Computer Engineering, 2021, 47(5): 36-43.

http://www.ecice06.com/CN/Y2021/V47/I5/36

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