Section: 6.10.3.3 Negotiation of security algorithms
Content: The MN shall receive the UE security capabilities from the AMF or the previous NG-RAN node. These security capabilities include both LTE and NR security capabilities. When establishing one or more DRBs and/or SRBs for a UE at the SN, as shown on Figure 6.10.2.1-1, the MN shall provide the UE security capabilities of the UE to the SN in the SN Addition/Modification Request message. Upon receipt of this message, the SN shall select the algorithms with highest priority in its locally configured list of algorithms that are also present in the received UE security capabilities and include the selected algorithms in SN Addition/Modification Request Acknowledge. The MN shall provide the selected algorithms to the UE during the RRCConnectionReconfiguration procedure that configures the DRBs and/or SRB with the SN for the UE. The UE shall use the indicated algorithms for the DRBs and/or SRB whose PDCP terminates on the SN. NOTE: The algorithms that the UE uses with the MN can be the same or different to the algorithms used with the SN.