Authentication Server Function (AUSF)

Authentication Server Function

Part of Alepo’s Converged Core offerings, Alepo’s Authentication Server Function (AUSF) is a 3GPP Release 16 compliant network function. Crucial for secured network access, the AUSF is responsible for the security procedure for SIM authentication using the 5G-AKA authentication method.

5g 5gc 5g core ausf

What is Authentication Server Function (AUSF) in 5g ?

Authentication Server Function performs 5G authentication and Key Agreement method 5G AKA. AUSF also offers additional support to handle concealed or privacy-protected subscription identifiers.

What function does AUSF perform in 5G?

5G AUSF receives authentication requests from the Access and Mobility Management Function (AMF) and interacts with Unified Data Management (UDM) to obtain authentication vectors for processing 5G AKA authentication, and validates network responses to determine whether or not the authentication was successful. It also handles re-synchronization procedures as a part of 5G AKA authentication.

Network Function: 5G AUSF

Seamless Authentication Support

Alepo AUSF provides authentication support for 5G services. In the 5G network, it performs various actions:

Handles routing based on SUCI and SUPI
Manages authentication confirmation timeout
Supports re-synchronization procedure
Maintains session states in an external centralized database for stateless operations

Microservice-Based Architecture

Alepo’s Authentication Server Function employs a microservice-based architecture in line with 5G Service-Based Architecture (SBA). Alepo Authentication Server Function supports:

REST-based APIs in compliance with open API 3.0 standards
An open, agnostic, and multi-vendor environment
Continuous integration and continuous deployment, reducing time-to-market

Flexible Deployment Models

Alepo’s 5G Authentication Server Function (AUSF in 5g) supports containerized deployments as well as virtual machine-based (VM-based) deployment models to meet diverse business requirements. Features include:

Can be deployed in public, private, and hybrid cloud environments (with support for multiple cloud systems: Redhat Openshift, AWS, Windriver, MS Azure, and more)
Supports PaaS-agnostic deployments

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Authentication Server Function (AUSF)