Abstract
This paper addresses the need for a secure data management framework for lightweight Internet of Things (IoT) networks. Existing approaches rely on capable nodes or external cloud technology to carry out key functions for the lightweight IoT nodes, such as data processing, storage or routing. Instead, this paper considers a fully lightweight network or an existing network where the more capable nodes have failed. We propose a novel data management framework using a lightweight distributed ledger for IoT networks. This includes a trust-based data aggregation protocol in which data from untrustworthy nodes is not disregarded, but is instead utilised to strengthen the aggregation result. MATLAB simulations show that the proposed aggregation scheme infers data with high accuracy for both trustworthy and untrustworthy networks. Neutral networks exhibit a higher error rate but the maximum error rate decreases for larger networks.
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