Section: 6.15 UE parameters update via UDM control plane procedure security mechanism 6.15.1 General
Content: This clause describes the security functions necessary to update the UE parameters using the UDM control plane procedure specified in TS 23.502[ Procedures for the 5G System (5GS) ]  [8]. The security functions are described in the context of the functions supporting the delivery of UE Parameters Update Data from the UDM to the UE after the UE has successfully registered to the 5G network. If the control plane procedure for UE parameters update is supported by the UDM, the AUSF shall store the latest KAUSF after the completion of the latest primary authentication. The content of UE Parameters Update Data and the conditions for sending it to the UE as well as how it is handled at the UE are specified in TS 24.501[ Non-Access-Stratum (NAS) protocol for 5G System (5GS); Stage 3 ]  [35]. NOTE : The home network relies on the serving network to deliver the UE parameters update.