Trusted Authentication Mechanism of IoT Terminal Based on Authorization Consensus and Reputation Evaluation

With the deep integration of a new generation of information technology and physical manufacturing, equipment in all walks of life and fields has transformed to digitalization, networking, and intelligence, and the Internet of Things puts forward higher requirements for ubiquitous interconnection, security, reliability, intelligence, and efficiency. The data interaction of IoT terminal devices has cross-system, cross-enterprise, and cross-business requirements, but this also leads to many sensitive information in the Internet of Things network, such as hidden leakage and difficulty in distinguishing the authenticity of data information. Based on the above challenges, this article proposes a distributed authentication scheme based on Delegated Proof of Stake consensus algorithm and a dynamic reputation evaluation mechanism based on smart contracts, which improves the authentication efficiency and the anti-attack ability of the authentication network and maintains the security and stability of the network. At the same time, the dynamic reputation evaluation results are uploaded to the blockchain storage, which not only ensures the security and immutability of data but also provides queryable historical reputation records for subsequent terminal access authentication evaluation. Safety analysis and performance simulation experiments show that the proposed scheme has high safety and good performance.