College of Physics and Electronic Information, Anhui Normal Univresity, Wuhu, Anhui, 241000, China.
Faculty of Science, Wilfrid Laurier University, 75 University Avenue West, Waterloo, ON, N2L 3C5, Canada.
J Med Syst. 2018 Jun 28;42(8):140. doi: 10.1007/s10916-018-0995-5.
Electronic health record sharing can help to improve the accuracy of diagnosis, where security and privacy preservation are critical issues in the systems. In recent years, blockchain has been proposed to be a promising solution to achieve personal health information (PHI) sharing with security and privacy preservation due to its advantages of immutability. This work proposes a blockchain-based secure and privacy-preserving PHI sharing (BSPP) scheme for diagnosis improvements in e-Health systems. Firstly, two kinds of blockchains, private blockchain and consortium blockchain, are constructed by devising their data structures, and consensus mechanisms. The private blockchain is responsible for storing the PHI while the consortium blockchain keeps records of the secure indexes of the PHI. In order to achieve data security, access control, privacy preservation and secure search, all the data including the PHI, keywords and the patients' identity are public key encrypted with keyword search. Furthermore, the block generators are required to provide proof of conformance for adding new blocks to the blockchains, which guarantees the system availability. Security analysis demonstrates that the proposed protocol can meet with the security goals. Furthermor, we implement the proposed scheme on JUICE to evaluate the performance.
电子健康记录共享有助于提高诊断的准确性，而在系统中，安全性和隐私保护是至关重要的问题。近年来，由于区块链具有不可变的优势，已被提议作为实现个人健康信息（PHI）共享的安全和隐私保护的有前途的解决方案。本工作提出了一种基于区块链的安全和隐私保护 PHI 共享（BSPP）方案，用于改善电子健康系统中的诊断。首先，通过设计其数据结构和共识机制，构建了两种区块链，私有区块链和联盟区块链。私有区块链负责存储 PHI，而联盟区块链则保存 PHI 的安全索引记录。为了实现数据安全性、访问控制、隐私保护和安全搜索，包括 PHI、关键字和患者身份在内的所有数据都使用关键字搜索进行公钥加密。此外，要求块生成器提供合规性证明，以将新块添加到区块链中，从而保证系统的可用性。安全分析表明，所提出的协议可以满足安全目标。此外，我们在 JUICE 上实现了所提出的方案，以评估其性能。
