I have a question dealing with the EAP-AKA' used in 5G to authenticate clients coming from a 3GPP-Network.
I read the latest specification on ETSI. The problem which I have is based on Step 2 on Page 37/38, where it says (at least I understood it like that), that when the UDM/ARPF got the SUCI it shall continue as shown in RFC 5448 (a description of a EAP-AKA'), otherwise it shall follows the EAP-AKA' shown in the specification (TS 133 501).
That's what confuses me. Are there really two different implementations of the EAP-AKA'? I tried to layer those two, but for me those two are different, due to the message flow. Is that correct?