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SPChain: Blockchain-based Medical Data Sharing and Privacy-preserving eHealth System
arXiv - CS - Cryptography and Security Pub Date : 2020-09-21 , DOI: arxiv-2009.09957
Renpeng Zou (1), Xixiang Lv (1), Jingsong Zhao (1) ((1) School of Cyber Engineering, Xidian University, Xian, China)

The development of eHealth systems has brought great convenience to people's life. Researchers have been combining new technologies to make eHealth systems work better for patients. The Blockchain-based eHealth system becomes popular because of its unique distributed tamper-resistant and privacy-preserving features. However, due to the security issues of the blockchain system, there are many security risks in eHealth systems utilizing the blockchain technology. i.e. 51% attacks can destroy blockchain-based systems. Besides, trivial transactions and frequent calls of smart contracts in the blockchain system bring additional costs and security risks to blockchain-based eHealth systems. Worse still, electronic medical records (EMRs) are controlled by medical institutions rather than patients, which causes privacy leakage issues. In this paper, we propose a medical data Sharing and Privacy-preserving eHealth system based on blockChain technology (SPChain). We combine RepuCoin with the SNARKs-based chameleon hash function to resist underlying blockchain attacks, and design a new chain structure to make microblocks contribute to the weight of blockchain. The system allows patients to share their EMRs among different medical institutions in a privacy-preserving way. Besides, authorized medical institutions can label wrong EMRs with the patients' permissions in the case of misdiagnosis. Security analysis and performance evaluation demonstrate that the proposed system can provide a strong security guarantee with a high efficiency.

中文翻译:

SPChain:基于区块链的医疗数据共享和隐私保护电子健康系统

电子医疗系统的发展给人们的生活带来了极大的便利。研究人员一直在结合新技术使电子医疗系统更好地为患者服务。基于区块链的电子健康系统因其独特的分布式防篡改和隐私保护功能而变得流行。然而,由于区块链系统的安全问题,利用区块链技术的电子医疗系统存在诸多安全隐患。即 51% 的攻击可以破坏基于区块链的系统。此外,区块链系统中的琐碎交易和智能合约的频繁调用给基于区块链的电子健康系统带来了额外的成本和安全风险。更糟糕的是,电子病历(EMR)由医疗机构而非患者控制,这会导致隐私泄露问题。在本文中,我们提出了一个基于区块链技术(SPChain)的医疗数据共享和隐私保护电子健康系统。我们将 RepuCoin 与基于 SNARKs 的变色龙哈希函数相结合来抵抗底层区块链攻击,并设计了一种新的链结构,使微块对区块链的权重做出贡献。该系统允许患者以保护隐私的方式在不同的医疗机构之间共享他们的电子病历。此外,授权医疗机构可​​以在误诊的情况下,在患者的许可下标记错误的电子病历。安全分析和性能评估表明,所提出的系统可以提供强大的安全保障,并且效率很高。我们将 RepuCoin 与基于 SNARKs 的变色龙哈希函数相结合来抵抗底层区块链攻击,并设计了一种新的链结构,使微块对区块链的权重做出贡献。该系统允许患者以保护隐私的方式在不同的医疗机构之间共享他们的电子病历。此外,授权医疗机构可​​以在误诊的情况下,在患者的许可下标记错误的电子病历。安全分析和性能评估表明,所提出的系统可以提供强大的安全保障,并且效率很高。我们将 RepuCoin 与基于 SNARKs 的变色龙哈希函数相结合来抵抗底层区块链攻击,并设计了一种新的链结构,使微块对区块链的权重做出贡献。该系统允许患者以保护隐私的方式在不同的医疗机构之间共享他们的电子病历。此外,授权医疗机构可​​以在误诊的情况下,在患者的许可下标记错误的电子病历。安全分析和性能评估表明,所提出的系统可以提供强大的安全保障,并且效率很高。经授权的医疗机构可​​以在患者许可的情况下标记错误的电子病历,以防误诊。安全分析和性能评估表明,所提出的系统可以提供强大的安全保障,并且效率很高。经授权的医疗机构可​​以在患者许可的情况下标记错误的电子病历,以防误诊。安全分析和性能评估表明,所提出的系统可以提供强大的安全保障,并且效率很高。
更新日期:2020-09-22
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