[WIP] Make IMSI Pseudonymization an optional extension of 3GPP TS
NOTE: this file is deprecated, it will be replaced by imsi-pseudo-spec.adoc.
Relevant specs:
- 3GPP TS 23.008: Organization of subscriber data
- Add pseudo IMSI and pseudo_imsi_i optionally to be saved in the HLR
- "Process Update_Location_HLR" of TS 09.02
- Cancel location in old VLR/SGSN if IMSI pseudonymization is enabled, and a previous pseudonymous IMSI exists for the subscriber
Optional additions we need to make, and where to make them:
- Initial provisioning of the SIM: can optionally have a pseudo IMSI
- During location update, the HLR uses the pseudo IMSI for all communication with the VLR / MSC
- Is there anything to update? We just replace the IMSI, so the SIM and the VLR / MSC don't act any different
- After successful location update:
TODO:
- extend the list above with the exact sections of the spec, where the new information should be placed
- Is there a spec for SIM applets, or do we put the SIM applet behaviour in the regular spec for SIM cards, or mention its behavior in the location update related change?
- describe everything in detail, fill in the full contents for the SMS etc.