5G • Core Network
Nausf Interface
AUSF Service-Based Interface
RESTful service interface exposed by AUSF executing primary authentication (5G-AKA and EAP-AKA').
Technical Explanation
Exposed over HTTP/2, Nausf_UEAuthentication provides authentication services to AMF. It verifies user response tokens (RES*), coordinates with UDM to validate vectors, confirms serving network authorization, and derives master anchor keys (K_SEAF).
Key Functions
- Executes primary authentication verification for AMF
- Supports 5G-AKA and EAP-AKA' authentication protocols
- Derives master security key K_SEAF and distributes it securely to AMF
Specifications
3GPP TS 29.509
Interfaces
NausfSBI
Related 5G Concepts
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