信息安全研究2025，Vol.11Issue(1)：74-80,7.DOI:10.12379/j.issn.2096-1057.2025.01.11
基于区块链的电子病历安全高效共享方法
A Secure and Efficient Sharing Method for Electronic Medical Records Based on Blockchain
摘要
Abstract
In response to the challenges faced by medical institutions in sharing electronic medical records,such as privacy leakage risks and inefficient retrieval issues,this paper proposes an efficient encrypted retrieval and sharing scheme for electronic medical records based on blockchain technology.We propose a blockchain-based scheme for efficient encryption,retrieval,and sharing of EMRs.Firstly,the scheme stores encrypted EMRs on cloud servers and implements the retrieval process on a consortium blockchain,effectively achieving separation of storage and retrieval.It incorporates a confusion trapdoor set,significantly reducing the risk of keyword guessing attacks.Secondly,considering the unique nature of medical data,we introduce an optimized inverted index structure that effectively resolves efficiency concerns when handling a large volume of EMRs.Lastly,based on this index structure,we develop a ciphertext retrieval algorithm that efficiently retrieves ciphertexts by combining searchable encryption's trapdoor technique with keyword ciphertexts in the inverted index.Experimental results demonstrate that our proposed solution successfully addresses the challenges in the healthcare industry's EMR sharing,enhancing system operational efficiency while ensuring privacy protection.关键词
区块链/可搜索加密/隐私保护/国密算法/数据共享Key words
blockchain/searchable encryption/privacy protection/state cryptography algorithms/data sharing分类
信息技术与安全科学引用本文复制引用
谷占新,马利民,王佳慧,张伟..基于区块链的电子病历安全高效共享方法[J].信息安全研究,2025,11(1):74-80,7.基金项目
国家重点研发计划项目(2022YFC3320900) （2022YFC3320900）
北京市教育委员会科研计划项目(KM202311232005) （KM202311232005）
