SUPI/SUCI Concealment is a new 5G-Standalone (SA) feature to encrypt the IMSI/SUPI with a network operator public key. pySIM now supports writing these 5G-specific files to USIM cards.
In short:
- USIM Service 124 enables SUCI calculation
- SUCI_Calc_Info, stores the public keys, required
- Routing Indicator, required
To enable SUCI concealment, follow all steps. If you want to disable the feature, you can just disable USIM Service 124.