CPC H04W 12/0431 (2021.01) [G06F 7/582 (2013.01); H04L 9/32 (2013.01); H04L 12/04 (2013.01); H04L 12/06 (2013.01); H04W 12/041 (2021.01); H04W 12/062 (2021.01); H04L 2463/081 (2013.01)] | 10 Claims |
1. A communication system comprising:
a non-3GPP access network (AN) connecting to user equipment (UE);
a Non-3GPP Inter Working Function (N3IWF) node connecting to the non-3GPP AN;
an Access and Mobility Function (AMF) node connecting to the N3IWF node;
an Authentication Server Function (AUSF) node connecting to the AMF node via a Security Anchor Function (SEAF); and
an Unified Data Management (UDM) node connecting to the AUSF node,
wherein the N3IWF node receives a Registration Request message including a Key Set Identifier (KSI) and UE Security Capabilities from the UE via the non-3GPP AN,
wherein the N3IWF node forwards the Registration Request message to the AMF node,
wherein the AMF node sends, to the AUSF node, information for performing an authentication procedure for the UE, wherein the information is based on the received Registration Request message,
wherein the AUSF node receives an Authentication Vector (AV) including an expected response (XRES) from the UDM node,
wherein the AUSF node receives a response (RES) from the UE via the SEAF, and
wherein the AUSF node authenticates the UE by comparing the RES with the XRES.
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