Section: 14.1.4 Nausf_UPUProtection service
Content: The following table illustrates the security related services for UE Parameters Update that AUSF provides. Table 14.1.4-1: NF services for UE Parameters Update provided by AUSF Service operation name: Nausf_UPUProtection. Description: The AUSF calculates the UPU-MAC-IAUSF as specified in the Annex A.19 of this document using UE specific home key (KAUSF) along with the UE Parameters Update Data received from the requester NF (see clause A.19) and delivers the UPU-MAC-IAUSF and CounterUPU to the requester NF. If the ACK Indication input is present, then the AUSF shall compute the UPU-XMAC-IUE and return the computed UPU-XMAC-IUE as specified in Annex A.20 of the present document, in the response. The details of the UE Parameters Update Data is specified in TS 24.501[ Non-Access-Stratum (NAS) protocol for 5G System (5GS); Stage 3 ]  [35]. Input, Required: Requester ID, SUPI, service name, UE Parameters Update Data. Input, Optional: ACK Indication. Output, Required: UPU-MAC-IAUSF, CounterUPU or error (counter_wrap). Output, Optional: UPU-XMAC-IUE (if the ACK Indication input is present, then the UPU-XMAC-IUE shall be computed and returned).