Electronic healthcare (eHealth) identity management (IdM) is a pivotal feature in the eHealth system. Distributed ledger technology (DLT) is an emerging technology that can achieve agreements of transactional data states in a decentralized way. Building identity management systems using Blockchain can enable patients to fully control their own identity and provide increased confidence in data immutability and availability. This paper presents the state of the art of decentralized identity management using Blockchain and highlights the possible opportunities for adopting the decentralized identity management approaches for future health identity systems. First, we summarize eHealth identity management scenarios. Furthermore, we investigate the existing decentralized identity management solutions and present decentralized identity models. In addition, we discuss the current decentralized identity projects and identify new challenges based on the existing solutions and the limitations when applying it to healthcare as a particular use case.

中文翻译：

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用于eHealth身份隐私的分布式分类帐技术：最新发展和未来展望。

电子医疗（eHealth）身份管理（IdM）是eHealth系统中的关键功能。分布式分类帐技术（DLT）是一种新兴技术，可以以分散的方式达成交易数据状态的协议。使用区块链构建身份管理系统可以使患者完全控制自己的身份，并提高对数据不变性和可用性的信心。本文介绍了使用区块链进行分散式身份管理的最新技术，并重点介绍了在未来的健康身份系统中采用分散式身份管理方法的可能机会。首先，我们总结了eHealth身份管理方案。此外，我们调查了现有的分散式身份管理解决方案，并提出了分散式身份模型。