摘要
针对电子病历存在数据安全和存储、数据共享等方面的问题,提出区块链中可搜索加密电子病历数据共享方案。首先,所提方案利用云服务器实现电子病历的存储,并对相应密文进行重加密,以保证不同医疗机构之间的数据共享。其次,使用区块链存储索引,搜索阶段在联盟链上调用智能合约执行关键词密文搜索,实现索引安全存储的同时,降低半诚实的第三方不实搜索风险。同时,该方案将条件隐藏在重加密密钥中来保证数据的机密性,保证代理无法了解任何有关条件的信息。最后,通过实验分析可知,该方案是轻量级的,在计算和通信开销方面具有很大优势。
A searchable encrypted electronic medical record data sharing scheme in blockchain is proposed for the problems of data security,storage,and data sharing existing in electronic medical records.Firstly,the proposed scheme uses a cloud server to store electronic medical records and re-encrypts the corresponding ciphertexts to ensure data sharing among different medical institutions.Secondly,the blockchain is used to store indices.In the search phase,a smart contract is invoked on the consortium blockchain to execute keyword ciphertext search,which realizes secure storage of indexes and reduces the risk of malicious searches by semi-honest third parties.At the same time,this scheme hides conditions in re-encryption keys to ensure data confidentiality,ensuring that agents cannot learn any information about the conditions.Finally,analysis shows that the scheme is lightweight and has great advantages in terms of computational and communication overhead.
作者
李亚红
李哲玮
李强
王彩芬
张学军
LI Yahong;LI Zhewei;LI Qiang;WANG Caifen;ZHANG Xuejun(School of Electronic and Information Engineering,Lanzhou Jiaotong University,Lanzhou 730070;School of Computer Science and Engineering,University of Electronic Science and Technology of China,Chengdu 610054;College of Big Data and Internet,Shenzhen Technology University,Shenzhen 518118,China)
出处
《计算机工程与科学》
北大核心
2025年第8期1399-1407,共9页
Computer Engineering & Science
基金
国家自然科学基金(61063041,61901201,61762058,62002050,61872060)
甘肃省科技计划(22JR5RA158,22JR5RA350)
甘肃省高校教师创新基金项目(2023A-041,2023-ZD-234)
甘肃省教育厅产业支撑计划(2022CYZC-38)
甘肃省教育厅高校创新基金项目(2023A-041)
2023年度兰州市科技发展计划(2023-ZD-234)。
关键词
电子病历
区块链
可搜索加密
代理重加密
electronic medical record
blockchain
searchable encryption
proxy re-encryption
