Security Protection Method for the Edge Equipment of Power Internet of Things based on Blockchain

With the construction of the power Internet, the safety and reliability of edge Equipment of power grid have been put forward higher requirements. This paper proposes a blockchain-based security protection method for edge Equipment of power Internet of Things. Based on Blockchain technology, Hash chain and distributed storage scheme are used to realize lightweight authentication method, and an identity authentication scheme for edge Equipment is proposed in line with the characteristics of security and stability control system. A hierarchical access control strategy based on multi-attributes is established by mining the relationship of attribute permissions among data access roles in power Internet. The experiment shows that the average operation time of the new equipment's network access and certification is in the order of ms, which effectively meets the high requirements of timeliness and security of the power system. The access control strategy can meet the requirements of multi-entity and multi-role access in the power Internet scenario, and can monitor and identify the behavior compliance of various access Equipment, which greatly improving the communication security and efficiency between power Equipment.