Performance Evaluation of Ethereum-based On-chain Sensor Data Management Platform f or Industrial IoT

CIA (Confidentiality, Integrity and Availability) is getting more and more important in the cloud based manufacturing and HoT (Industrial Internet-of-Things)/Indutry 4.0 domain. Recently, blockchain, a decentralized ledger technique, has attracted considerable attention to realize secure and robust data management systems for HoT. Although several blockchain-based data management platforms HoT have been proposed, sensor data are stored outside of the blockchain, meaning that the data integrity and accessibility are not improved. In this paper, we take a different blockchain-based approach for sensor data management; any important sensor data are stored in the blockchain. For realizing this, a series of sensor data is compressed-thenstored in the blockchain by leveraging a fact that many sensor data often have a certain level of periodicity and stability. We have tested our idea against the real sensor data measured at our model factory, and evaluated several performance metrics such as compression ratio, compression/decompression time, process time required to store and retrieve sensor data from our Proof-of-Concept system with Ethereum and the expected blockchain size. From the results, it can he concluded that the proposed platform is viable for small factory cases but needs more technological advancement is required for large scale cases.