We propose a scalable self-sovereign identity (S3I) system architecture that uses a hierarchically structured Byzantine fault tolerance layer of validating authorities and a permissioned blockchain to record and manage user identities. Users and service providers interact with the S3I system through nearby proxy nodes that store copies of the blockchain but do not participate in the consensus protocol. We identify different challenges of such a system and discuss design choices that allow those challenges to be addressed and ultimately resolved, with focus on networking issues such as performance and coverage. We also show preliminary performance evaluation results that confirm the validity of the proposed approach.

中文翻译：

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可扩展的自我主权身份架构


我们提出了一种可扩展的自我主权身份（S3I）系统架构，该架构使用分层结构的拜占庭容错层验证权限和许可的区块链来记录和管理用户身份。用户和服务提供商通过附近的代理节点与 S3I 系统进行交互，这些代理节点存储区块链的副本，但不参与共识协议。我们确定了此类系统的不同挑战，并讨论了能够应对并最终解决这些挑战的设计选择，重点关注性能和覆盖范围等网络问题。我们还展示了初步的性能评估结果，证实了所提出方法的有效性。