Ensuring data reliability in Internet of Things (IoT) environments is critical for enabling trustworthy AI systems. This paper introduces RFoT, a layered framework that integrates Blockchain, Smart Contracts, and Federated Learning (FL) to guarantee data confidentiality, integrity, availability, and authenticity across the IoT data lifecycle. Confidentiality is addressed via privacy-preserving automation with Fernet encryption and Smart Contracts, while traceability and immutability are ensured through a dual-layer Blockchain architecture. Experimental results, based on a thermal comfort classification task using FL, demonstrate that conventional IoT setups propagate corrupted data, impairing model accuracy. In contrast, RFoT successfully blocks compromised data, preserving classification performance. These findings validate RFoT as a reliable data source for edge-based learning systems. This paper presents the following key contributions:
Silva et al. (Wed,) studied this question.