电子病历(electronic medical records,EMR)能够安全高效地跨域共享,给患者跨域就诊带来极大便利,但传统集中式的电子病历管理方式存在隐私泄露、单点故障和病历确权等安全问题,不利于患者跨域就诊.本文提出了基于联盟链和代理重加密的电子病历跨域共享方案,利用区块链和星际文件系统规避了集中式管理带来的单点故障问题.患者通过代理重加密算法授权跨域数据用户解密病历密文,确保只有被授权的用户才能访问文件,实现不同信任域间的密文转换.该方案能抵抗多种类型攻击且计算成本较低.
Electronic medical records(EMR)can be safely and efficiently shared across domains, bringing great convenience to patients seeking medical treatment across domains. However, traditional centralized electronic medical record management methods have security issues such as privacy leakage, single point of failure, and medical record ownership, which are not conducive to patients seeking medical treatment across domains. This article proposes a cross-domain sharing scheme for electronic medical records based on consortium chain and proxy re-encryption. By combining blockchain and Inter Planetary File System, a distributed file storage system is provided to avoid the problem of single point of failure caused by centralized management. Patients authorize cross-domain data users to decrypt medical record ciphertext through proxy re-encryption algorithms, ensuring that only authorized users can access files and achieving ciphertext conversion between different trust domains. This scheme can resist multiple types of attacks and has a lower computational cost.
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