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A Decentralizing Attribute-Based Signature for Healthcare Blockchain

机译：基于分散的基于属性的HealthCare Slowchain签名

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摘要

Blockchain is one of the technology innovations for sharing data across organizations through a peer to peer overlay network. Many blockchain- based data sharing applications, such as sharing Electronic Health Records (EHRs) among different Care Delivery Organizations (CDOs), require privacy preserving verification services with dual capabilities. On one hand, the users want to verify the authenticity of EHR data as well as the identity of the signer. On the other hand, the signer wants to keep his real identity private such that others cannot trace and infer his identity information. However, typical blockchain systems that use pseudonyms as public keys, such as Bitcoin's blockchain, cannot support such privacy-preserving verification. In such systems, it is hard to verify the authenticity of signer's identity, and adversaries or curious parties can guess the real identity from the series of statements and actions taken with a specific pseudonym through inference attacks, such as by transaction graph analysis. In this paper, we propose a decentralized attribute- based signature scheme for healthcare blockchain, which provides efficient privacy-preserving verification of authenticity of EHR data and signer's identity. We also describe a holistic on-chain and off- chain collaborative storage system for efficient storage and verification EHR data. The analysis and experiments show that our scheme is effective and deployable.
机译：BlockChain是通过对等覆盖网络通过对等覆盖网络共享组织的技术创新之一。许多基于区块链的数据共享应用程序，例如在不同关怀传送组织（CDOS）之间共享电子健康记录（EHRS），要求隐私保留具有双重功能的验证服务。一方面，用户想要验证EHR数据的真实性以及签名者的身份。另一方面，签名者希望保持他的真实身份私有，以便其他人无法追踪和推断他的身份信息。但是，使用假名作为公钥的典型区块链系统，例如比特币的区块链，不能支持这种隐私保留验证。在这样的系统中，很难验证签名者身份的真实性，对手或好奇的缔约方可以通过推导攻击的特定假名与特定假名进行的陈述和动作估计真实身份，例如通过事务图分析。在本文中，我们提出了一种用于医疗区的基于财政基于的基于属性的签名计划，它提供了有效的隐私保留验证EHR数据和签名者身份的真实性。我们还描述了一个全面的链链和脱锁协作存储系统，用于高效存储和验证EHR数据。分析和实验表明，我们的计划是有效和可部署的。

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