name: AP
full_form: Access preamble
context: An Authentication Proxy (AP) is a proxy which takes the role of an AF and delegates a group of Application Servers (ASs). It may reside between the UE and the AS as depicted in the figures below. The AP helps the ASs behind the AP to execute AKMA procedures to save the consumption of signalling resources and AAnF computing resources. It may also relieve the AS of security tasks. The use of an AP is fully compatible with the architecture specified in the present document. The AP can assure the ASs that the request is coming from an authorized subscriber of the MNO. Figure 4.7.1-1: Environment and reference points of AP when AP is internal Figure 4.7.1-2: Environment and reference points of AP when AP is external If the Ua* is HTTP based, the UE is configured with the FQDN of AS, and the AP is a reverse proxy to handle the communication between the UE and the AS. The AP takes the role of an AF. The AKMA Application Key (i.e. KAF), which is utilized between the UE and the AP, is derived
description: An Authentication Proxy (AP) is a network function that acts as a proxy for Application Servers (ASs), delegating tasks such as executing AKMA procedures to conserve signaling resources and AAnF computing resources. It may also perform security tasks on behalf of the AS.
explanation: The text describes AP as performing specific functions within a network, acting as an intermediary between users and application servers, and managing resource allocation and security tasks. These characteristics align with the definition of a Network Function.
section_title: 4.7.1	Architecture of using AP
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