Authentication Server Function

Authentication Server Function (AUSF)

Authentication Server Function

Part of Alepos Converged Core offeringsAlepo’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)?

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

5G Authentication

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 AUSF 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
3GPP 5G AUSF
Authentication Server Function

Flexible Deployment Models

Alepo’s 5G Authentication Server Function 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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