name: TTP
full_form: Trusted Third Party
context: HN for the NG-UE. The message contains the IMSI, temp ID or MSISDN of the NG-UE. The message may be sent to the PCF / NEF over the N5, the reference point between PCF and AF, or over the Nnef, the service-based interface exhibited by the NEF. The PCF / NEF obtains the subscription profile associated with the NG-UE from the UDM (ARPF / SIDB). The PCF / NEF sends the authorization policies that are required for authorization to the TTP (AuthF). The TTP (AuthF) performs authorization check(s) of the NG-UE based on policies and context info. This may entail one or more checks that may involve the NG-UE. If the authorization check(s) were passed by the NG-UE, the TTP (AuthF) generates a PoA. The PoA may be in the form of an Access Token. The TTP (AuthF) sends a Service Authorization Response message containing the PoA to the NG-UE. In case of a failed authorization a failure code is sent. The Service Authorization Response message is sent over a pre-established secure NG-UE â TTP
description: The Trusted Third Party (TTP) is a network function that performs authorization checks on the Next Generation User Equipment (NG-UE) based on policies and context information. It generates a Proof of Authorization (PoA), which may be in the form of an Access Token, upon successful authorization.
explanation: The TTP is classified as a Network Function because it plays a crucial role in the authorization process of NG-UEs within the network, interacting with other network functions like PCF/NEF and UDM to obtain subscription profiles and perform authorization checks.
section_title: 5.6.4.3.2	Solution details
biotag_Context: B-Network,O,O,O,O,O,O,O,O,O,B-Parameter,O,B-Parameter,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,B-Network Function,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,B-Network Function,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,B-Network Function,O,B-Network Function,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network Function
biotag_Description: O,B-Network Function,I-Network Function,I-Network Function,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,O,O,O,O,O,O