ABSTRACT The proliferation of Internet of Things (IoT) devices has created an urgent demand for secure, scalable and interoperable data‐sharing architectures. Centralized paradigms exhibit single points of failure, inadequate access control and limited transparency, rendering them structurally misaligned with the distributed nature of IoT deployments. This paper presents a systematic review and taxonomy of blockchain‐based secure data‐sharing frameworks for IoT, synthesizing 20 peer‐reviewed studies published between 2019 and 2025. The literature is organized into four thematic clusters: (i) access control and authentication, (ii) decentralized storage and integrity verification using IPFS, (iii) privacy‐preserving federated learning integrated with blockchain and (iv) domain‐specific deployments in healthcare, industrial IoT, and intelligent transport systems. For each cluster, we synthesize consensus mechanism choices, chain‐type selection, storage strategy, access‐control model and threat‐model coverage.
Augustine et al. (Thu,) studied this question.
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