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The potential of blockchain to provide security, transparency, and data integrity in distributed IoT environments has fuelled immense interest from academic institutions and commercial enterprises. Recently, trust-based consensus protocol has become the key to supporting distributed IoT networks through blockchain. However, current research overlooks network mo-nopolization and infinite reputation (trust), while nodes with high trust escape validation duties, leaving open questions about participation incentives. In this paper, a protocol is proposed in which a quantifiable approach to IoT node reputation is established through a numerical reputation score. This value, informed by the node's historical behavior and performance, enables objective comparison and ranking of nodes, providing a robust foundation for conflict resolution and dispute adjudication within the IoT network. A simulation is conducted to choose the most suitable scaling factors for reputation, and the results confirm the proposed protocol's robustness against possible forks and malicious behavior with a block confirmation time suitable for IoT applications in comparison with previous related work.
Khairat et al. (Tue,) studied this question.
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