Network access authentication method and system based on quantum key

The application discloses a network access authentication method based on a quantum key. The method includes the following steps: enabling a management platform to receive a user password sent by a terminal; determining whether the user password is consistent with a default password, wherein the default password is a password generated according to a quantum key that is obtained by the managementplatform and a password distribution node by using a QKD protocol; and if yes, allowing the terminal to access the network. According to the technical scheme provided by the application, the default password is generated according to the quantum key that is obtained by the management platform and the password distribution node by using the QKD protocol, since the quantum key has absolute securityand cannot be duplicated, the default password generated according to the quantum key can also have absolute security, and the security of network access authentication can be greatly improved. The application also provides a