Fog-Blockchain Fusion for Event Evaluation and Trust Management
Youssef Sellami, Youcef Imine, Antoine Gallais · IEEE Transactions on Dependable and Secure Computing · 2025
Trustworthiness is a critical element influencing every entity in fog computing architectures, which raises reliability and security issues for data exchanged between fog nodes and data sources. Malicious entities can introduce incorrect or manipulated information, requiring trust assessment and management. Maintaining trust throughout the fog computing architecture requires robust trust mechanisms, secure communication protocols, constant trust management and evaluation models. The integration of blockchain technology also provides a transparent and traceable environment, enabling the preservation of trust scores and promoting accountability. Indeed, we propose a new way of calculating event trustworthiness by exploiting trust factors such as Dempster-Shafer theory, temporal relevance and distance relevance. As a result, malicious entities can be discovered and trustworthy behavior can be promoted in the fog computing environment. Finally, we prove that our protocol is highly efficient, as demonstrated by extensive simulations and in-depth theoretical analysis that confirmed its security.