Security access control method and device

Provided are a security access control method and device, applied to the technical field of communications, the method comprising: sending an access request to a network storage function (NRF) network element, the access request being used for requesting to access a service providing network function (SP-NF) network element; receiving response information sent by the NRF network element based on the access request; the response information comprises first knock port information of the SP-NF network element and a token (Token); sending a port knock request to the SP-NF network element based on the first knock port information, wherein the port knock request is used for requesting the SP-NF network element to open a first service port; and after response information which is sent by the SP-NF network element and indicates that the verification of the port knocking request is passed is received, accessing the SP-NF network element based on the Token. 本发明提供一种安全访问控制方法和设备，应用于通信技术领域，该方法包括：向网络存储功能NRF网元发送访问请求，所述访问请求用于