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.
For details, see TS31.102 (minimum Version 16 for 5G stuff).