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Siyuan LiuThe Joint NTU-UBC Research Centre of Excellence in Active Living for the Elderly (LILY), Nanyang Technological University, Singapore, Singapore Design/methodology/approach -The study proposed modeling, model analysis and architecture design.Findings -The proposed solution uses the blockchain technology to build an open, trusted, decentralized and tamper-proof system, which provides the indisputable mechanism to verify that the data of a transaction has existed at a specific time in the network.Originality/value -To the best of our knowledge, this is the first work that integrates blockchain technology and LoRaWAN IoT technology.