Section: 14.1.3 Nausf_SoRProtection service
Content: The following table illustrates the security related services for SoR that AUSF provides. Table 14.1.3-1: NF services for SoR provided by AUSF Service operation name: Nausf_SoRProtection. Description: The AUSF calculates the SoR-MAC-IAUSF as specified in the Annex A.17 of this document using UE specific home key (KAUSF), the Steering Information List and ACK Indication received from the requester NF and delivers the SoR-MAC-IAUSF and CounterSoR to the requester NF. If the ACK Indication input is set to indicate that the acknowledgement is requested, then the AUSF shall compute the SoR-XMAC-IUE as specified in Annex A.18 of the present document, and return it in the response. NOTE: At reception of Nausf_SoRProtection_Protect request from the UDM, the AUSF constructs the SOR header, as described in clause 9.11.3.51 of TS 24.501[ Non-Access-Stratum (NAS) protocol for 5G System (5GS); Stage 3 ]  [35], based on the information received from the requester NF, i.e. ACK Indication and list of preferred PLMN/access technology combinations or a secured packet (if provided). Input, Required: Requester ID, SUPI, service name, ACK Indication. Input, Optional: list of preferred PLMN/access technology combinations or secured packet or SoR transparent container. Output, Required: SoR-MAC-IAUSF, CounterSoR or error (counter_wrap). Output, Optional: SoR-XMAC-IUE (if the ACK Indication input is set to indicate that the acknowledgement is requested, then the SoR-XMAC-IUE shall be computed and returned).