Abstract: The present disclosure discloses an authentication and/or key management method, a first device, a terminal and a communication device. The method includes: receiving, by a first device, a session establishment request message initiated by a user equipment (UE), where the request message carries a key identifier, acquiring, by the first device, a first key between the first device and the UE according to the key identifier.

Abstract: Disclosed in the present application are a secure channel establishing method and apparatus, and an MSGin5G UE, an MSGin5G server and a storage medium. The method comprises: an MSGin5G UE generating a first key on the basis of an authentication and key management for application (AKMA) service; and on the basis of the first key, establishing a secure channel between the MSGin5G UE and an MSGin5G server.

Abstract: Disclosed in the embodiments of the present disclosure are an information processing method and a related network device. The method comprises: the network device receiving a first message which is sent by an access and mobility management function (AMF) and is used for slice authentication, the first message comprising a first slice identification, a first slice user identification and a first card user identification; determining a first pseudo code corresponding to the first slice identification and a first address of an authentication server, and generating a second message comprising the first pseudo code, the first slice user identification and the first card user identification; and sending the second message to the authentication server on the basis of the first address.