After the core network has finished decrypting the SUCI into a SUPI, in which function does it verify the SUPI？
I think the function of verifying SUPI is placed in UDM.
From the picture, AMF will find SUPI based on 5G-GUTI and use SUPI to complete the authentication. If the 5G-GUTI cannot find the corresponding SUPI, the AMF will request the SUCI from the UE and re-authenticate according to the SUCI.
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As I know,
AUSF is responsible for authentication.
UDM is just decrypt the
SUCI. when decryption work finished,
UDM will returns the
AUSF for authentication.