Smart grid security based on blockchain and smart contract

With the advent of the Fourth Industrial Revolution, the use of the smart grid is becoming more and more widespread. However, a large number of distributed smart grid devices currently have insecure authentication and low information sharing. As the use of blockchain technology can provide a secure and trustworthy interaction environment for smart grids, this paper proposes a blockchain-based smart grid security architecture, which resolves the conflict between distributed smart grid devices and centralized management is resolved. In the proposed architecture, we have newly designed blocks and gateway nodes, which improve the security and credibility of smart grid device identity authentication. Then we design a Computing Balance based Exchange (CBE) algorithm to improve the interaction efficiency between smart grid devices. In addition, the multi-layer smart contract based on smart grid is proposed to solve the problems of lack of mutual trust and information sharing between smart grid devices. Finally, the blockchain-based smart grid security architecture and multi-layer smart contract can achieve secure interaction and efficient identity authentication among smart grid devices.