Lightweight Root Key Management Scheme in Smart Grid IoT Network based on Blockchain Technology

Abstract

Abstract In the context of Smart Grid Internet of Things (IoT), the current key management approach in LoRa su↵ers from limitations such as low storage capacity and lack of update capability. To address these issues and ensure compatibility with existing IoT protocols, we propose a permissioned blockchain-based root key management scheme. The proposed scheme involves three automated phases - device registration, request participation, and key update facilitated through smart contracts. In the device registration phase, the device adds a block containing device information to the blockchain. In the request participation phase, the gateway verifies the request to determine the success of participation. Finally, in the key update phase, a new root key is negotiated between the device and the participant server using the key update contract. Simulation results show that compared to traditional key management schemes, this proposed scheme o↵ers higher security and shorter access time.