Secure Access Method of Power Internet of Things Based on Zero Trust Architecture

With the development of the energy Internet, the terminals of the power Internet of Things are open and interactive, the grid protection boundary is ambiguous, and the traditional boundary based security system is difficult to ensure the secure access of the power Internet of things terminals. The program proposed a secure access method for the power system based on the zero-trust architecture. It takes the identity of the terminal as the center to carry out security authentication and dynamic access control. Based on the device fingerprint extraction and the Identification Public Key algorithm, the lightweight security authentication of the power terminal is realized. Through the trust calculation method based on terminal operating characteristics, continuous trust assessment and dynamic access control are carried out. The method is verified in the distributed power security access scenario. For common flood attacks, packet attacks and malicious code attacks, the security access method of the power Internet of Things based on the zero-trust architecture can effectively detect and block them in time, which can avoid attackers from conducting cyber attacks on the grid by controlling power IoT terminals (This work was supported by the State Grid Shanghai Technology Project, Research on Key Technologies for Network Security Access of Power Monitoring System Based on Zero Trust.).