A Research on Micropayment with IOTA <Abstract> There is an increasing demand for using micropayment, a small amount of electronic payment of several yen or tens of yen, such as IoT applications. That type of payment method can be enabled by cryptocurrency and distributed ledger technology. However, conventional cryptocurrency, such as Bitcoin, faces several challenges, including transaction fees and latency. IOTA, a new type of cryptocurrency, potentially achieves the microtransaction. IOTA does not require a mining process and can do transactions without fee at high speed. In this work, we implement a micropayment system using IOTA and evaluate its feasibility on an emulator and IoT devices (i.e., Raspberry Pi). Moreover, we measure and compare the delay values in the systems. On the emulator systems using mininet-wifi and IoT devices, we have successfully confirmed the micropayment with IOTA. For the latency comparison, the IoT device with less computing power has longer latency due to the heavier hash calculation task. |