A distribution automation quantum key construction algorithm based on K-medoids

There is a huge demand for distributed power sources for the new type of power systems. Power electronic devices and flexible loads need to be integrated into the electrical grid. The security and reliability of equipment access directly affect the stable operation of the power system. The traditional centralized device access management mode is no longer applicable, because the terminal devices are diverse and widely distributed, and the applications of each terminal are complex, so the authentication and access efficiency based on centralized device access management is limited. Therefore, it is urgent to study the distributed identity authentication and trusted access technology of devices. To address the issues of compatibility and weak resilience against attacks in centralized access management during the device identity authentication process, a distributed terminal device identity authentication method based on cryptography and blockchain is presented in this paper. A detailed process for certificate issuance and identity authentication is designed. In conclusion, the devised approach has undergone testing, revealing its resilience against a variety of malicious attacks and highlighting its cost-effective characteristics in both computational and storage aspects.