UDM AUSF Service:

• Supports subscriber authentication request from AMF for 3GPP access only
• Requests authentication vector for UDM Authentication service and also generates key material for the AMF
• Processes and notifies UDM Authentication service about the authentication completion status of the UE
• Uses DB tier to store context information for each authentication session, which is indexed by contextId
• Subsequently processing of 5G-AKA authentication confirmation request from AMF, which is linked to the authentication session using the contextId and upon processing, the entry is deleted from DB

For more information, refer to AuSF Service User configuration parameters in UDM Installation Guide.