name: EF
full_form: Elementary File
context: Examples of such authorization checks may involve, an equipment authentication Based on the results of the authorization checks, the AuthF provides a PoA to the UE. The PoA may be in the form of one or more Access Token(s). It is assumed that the PoA is provided to the UE using a secure communications channel. The NG-UE securely stores the PoA, depending upon the type and validity of the PoA. In the case, of the access token, its scope and usage may be described in similar terms as the OAuth token. The NG-UE presents the PoA to the PEP / EF (e.g. eNB, MME). It is assumed that the UE presents the PoA to the EF using a secure communications channel. The EF verifies the PoA and determines the type of service access that has to be provided to the NG-UE. It is assumed that EF and AuthF share a trust relationship. After the EF verifies the PoA the NG-UE is granted access to the service. Procedure for a Dynamic Authorization by a Trusted Third-party is depicted in Figure 5.6.4.3.2-3. Figure
description: The Elementary File (EF) is a network function that verifies the Proof of Authorization (PoA) presented by the Next Generation User Equipment (NG-UE) and determines the type of service access to be provided. It shares a trust relationship with the Authentication Function (AuthF).
explanation: EF is classified as a Network Function because it performs a specific task within the network: verifying user authorization and controlling service access. This aligns with the definition of a Network Function as a component responsible for processing and managing network traffic.
section_title: 5.6.4.3.2	Solution details
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biotag_Description: O,B-Network Function,I-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network,I-Network,B-Device,I-Device,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O