Blockchain-based synchronized data transmission with dynamic device management for digital twin in IIoT

In the Industrial Internet of Things (IIoT), the data integrity in secure transmission improves the reliability of data analysis. To further reduce bandwidth consumption, the aggregate signature (AS) methodology is widely deployed in IIoT. Nevertheless, existing solutions are infeasible for digital twin empowered IIoT due to the following limitations: (i) the inconsistent time state of the data; and (ii) the ignored addition/removal issues of devices. Therefore, we propose a blockchain-based synchronized data transmission protocol (BT-SDT), which provides a synchronized clock for digital twin and implements dynamic device management. Specifically, we deploy the chaincode to maintain a clock synchronization service for AS between virtual space and physical space and re-design the chameleon hash modular on the redactable blockchain to update device information. We implement state-of-the-art solutions and BT-SDT to evaluate their computational and communication cost under a real IIoT dataset in Raspberry Pi and blockchain, which confirms the practical feasibility of BT-SDT.