Abstract: Embodiments of this application provide a method for obtaining a security classification result for a location area. A security function network element receives an identifier of a target location area and determines to perform security analytics on the target location area based on the identifier of the target location area. The security function network element may determine 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, where the behavior information includes traffic data and/or movement track information.

Abstract: This application provides a communication method, a communication device, a storage medium, and a program product, and may be applied to the field of 5th generation (5G) new radio (NR) technologies. When a communication apparatus meets an authentication trigger condition, authentication information is obtained from the communication apparatus by using an authentication request. The authentication information may be used to verify authenticity of first identification information of the communication apparatus, to implement security authentication on the communication apparatus. When a communication apparatus that passes the security authentication accesses a communication network, security of the communication network can be improved.

Abstract: The present application provides an automatic method for forecasting strong cold waves from horizontal-to-vertical trough transition using wave truncation, which includes: reading geopotential height data within a 500 hPa forecast key region in forecasting operations, and converting a screen coordinate system into a Cartesian coordinate system; analyzing contour lines of the geopotential height field; repeatedly truncating and splitting waves to extract truncation points; selecting trough candidate nodes from a set of truncation points; screening trough candidate nodes and organizing and constructing a trough line; detecting a slope of the trough fitting line to find a horizontal trough; calculating a north-south extension distance of the found horizontal trough; comparing this north-south extension distance with a north-south extension distance at a next time; and in a case where an increase amount exceeds a preset threshold, determining the start of a horizontal-to-vertical trough transition, thereby foreca

Abstract: This application relates to the field of wireless communication technologies, and discloses a random access method, a terminal, a network device, and a communication system. In this application, an RRC establishment cause may be determined in a random access procedure based on a network congestion status, and an uplink scheduling message including the RRC establishment cause is sent to the network device.

Abstract: A communication method and apparatus, wherein a first network element obtains a service authorization certificate. The service authorization certificate includes authorized resource information, and the service authorization certificate is used by the first network element to access an authorized resource indicated by the authorized resource information. The first network element generates a service request, and signs the service request, where the service request is used to request to access a target resource of a second network element, and the target resource is included in the authorized resource. The second network element receives the service authorization certificate and the signed service request from the first network element, and determines a service response based on the service authorization certificate and the signed service request, where the response message indicates whether the second network element provides an access service corresponding to the target resource.

Abstract: Embodiments of this application provide a communication method and an apparatus. The method includes: A second entity receives a request message from a network function entity, where the request message includes an initial certificate signed by a first entity for the network function entity and identity information of the network function entity, and the first entity is a trusted entity of the second entity; verifies consistency between the initial certificate signed by the first entity for the network function entity and the identity information of the network function entity; and signs an end entity certificate for the network function entity when a verification result is that the verification succeeds.