A Lightweight Certificateless Group Key Agreement Method without Pairing Based on Blockchain for Smart Grid

In smart grids, the access verification of a large number intelligent gateways and terminal devices has become one main concerns to ensure system security. This means that grids need new key management method is safe efficient low computational cost. Although scholars have conducted relevant research, most these schemes cannot balance overhead Therefore, we propose lightweight secure method, having overhead, based on blockchain for grids. Firstly, redesigned architecture grid completed division various entities. Furthermore, designed pairing-free certification authenticated group agreement under architecture. Finally, achieved higher security attributes, lower authentication delay compared traditional schemes, as shown in performance analysis comparison.