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Cross-domain Authentication Mechanism for Power Terminals Based on Blockchain and Credibility Evaluation

As the Internet of Things (IoT) technology develops rapidly [1], complex process and privacy leakage during crossdomain authentication of power terminals have become obstacles to improve operational efficiency and user experience. To solve these problems, this paper proposes an identity authentication mechanism based on Blockchain. Via analyzing power communication network, three types of processes are designed in detail, including identity, in-domain authentication, as well as cross-domain authentication for terminals. Moreover, to solve security issues between different domains with various security levels in cross-certification, this paper evaluates identity security and then establishes a cross-domain authentication credibility matrix. Through optimizing the credibility matrix, identity levels for power terminals can be calculated more accurately. Finally, evaluation and analysis about the proposed cross-domain authentication mechanism are presented in terms of scenario, algorithm science, scalability as well as robustness.