Industrial Internet of Things (IIoT) is revolutionizing plenty of industrial applications by utilizing large-scale smart devices in manufacturing and industrial processes. However, IIoT is facing the disclosure of identity privacy. The identity information is precious and critical, thereby inspiring a line of follow-up privacy-preserving studies, i.e., anonymous credential protocols, or privacy-preserving identity management schemes. However, they are either too anonymous to be used in the IIoT environment, or the system is highly centralized, which implies the risk of a single point of failure. In this article, we propose PBidm, a privacy-preserving blockchain-based identity management scheme for IIoT. Specifically, by leveraging blockchain and diversified cryptographic tools, PBidm can fully support the desirable properties, i.e., unforgeability, blindness, unlikability, traceability, revocability, and public verifiability. Then, we provide security analysis to ensure reasonable security assurance. Finally, we present a performance evaluation of the proposed scheme to demonstrate the practicability in IIoT applications.

中文翻译：

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PBidm：基于区块链的隐私保护工业物联网身份管理系统


工业物联网 (IIoT) 通过在制造和工业流程中利用大规模智能设备，正在彻底改变大量工业应用。然而，工业物联网正面临着身份隐私的泄露。身份信息是宝贵且关键的，从而激发了一系列后续的隐私保护研究，即匿名凭证协议或隐私保护身份管理方案。然而，它们要么过于匿名，无法在工业物联网环境中使用，要么系统高度集中，这意味着存在单点故障的风险。在本文中，我们提出了 PBidm，这是一种基于区块链的隐私保护 IIoT 身份管理方案。具体来说，通过利用区块链和多样化的密码学工具，PBidm可以充分支持不可伪造性、盲目性、不可喜性、可追溯性、可撤销性和公开可验证性等特性。然后，我们提供安全分析，以确保合理的安全保证。最后，我们对所提出的方案进行了性能评估，以证明其在工业物联网应用中的实用性。