Abstract: This application pertains to the field of communication technologies, and provides a communication method and apparatus, to implement false base station detection. A false base station may attack a terminal in a denial of service manner, and consequently, the terminal cannot access the false base station after selecting the false base station, in other words, the terminal fails to set up a connection to a cell. In this case, if a first message indicates that a first terminal fails to set up a connection to a cell, it may be determined, based on the first message, that a false base station attack exists in the cell, to implement false base station detection.

Abstract: Embodiments of this application provide a method for obtaining a security classification result and a communication apparatus. The method includes: A security function network element determines to perform security analytics on a target location area; and the security function network element determines a security classification result of the target location area based on first information, where the security classification result indicates a degree to which a potential attack exists in the target location area, the first information is related to behavior information of a terminal device in the target location area, and the behavior information includes traffic data and/or movement track information. According to this application, security analytics may be performed on a location area, to obtain a security classification result of the location area.

Abstract: This application provides a network verification method and apparatus. The method may include: A slice statistics network element (30) receives a slice registration request message (410) from a mobility management network element (20), where the slice registration request message (410) includes an identifier of a terminal device (10) and an identifier of a network slice. In response to the slice registration request message (410), the slice statistics network element (30) determines whether the terminal device (10) occupies a resource of the network slice. The slice statistics network element (30) determines, based on a determining result, whether to count the terminal device (10) into statistics about a terminal accessing the network slice.

Abstract: First user equipment generates a first temporary identifier based on a first key; the first user equipment sends a first request to second user equipment, where the first request is used to establish a communication connection between the first user equipment and the second user equipment, and the first request includes the first temporary identifier and a relay service code; and the first user equipment generates a shared key based on a second key and the relay service code, where the shared key is used to protect the communication connection between the first user equipment and the second user equipment.