Cellular Network Infrastructure » IMSI Pseudonymization

04/11/2020

08:34 AM Feature #4402: Specification: Create draft

Thanks, looks good in general.
I've pushed some minor changes, please review if they seem OK to you.
Some open topi... laforge

08:21 AM Revision b053436e (imsi-pseudo): spec: Refer to standard OTA SMS security

The encryption is "out of scope" because it already exists. Hence
we specify that the existing means of 23.048 shall... laforge

08:21 AM Revision 37981b6d (imsi-pseudo): spec: don't use Release 99 spec numbers (03.19 -> 43.019)

laforge

08:21 AM Revision 4dc664dd (imsi-pseudo): spec: Not all countries require proof of ID when buying SIMs

laforge

08:21 AM Revision 9d63d6fd (imsi-pseudo): spec: minor language/wording improvements

laforge

04/09/2020

01:24 PM Feature #4402: Specification: Create draft

I've created the proper specification draft with asciidoc in the git repository, and attached the PDF to this issue.
... osmith

01:19 PM Revision 247c8759 (imsi-pseudo): remove text replaced by specification

osmith

01:15 PM Revision 0feaa89a (imsi-pseudo): spec: move reference implementation to the end

osmith

01:13 PM Revision a0354de4 (imsi-pseudo): spec: User-configurable Minimum Duration Between IMSI Changes

osmith

12:54 PM Revision 69e3fa6b (imsi-pseudo): spec: Warning the Subscriber If the Pseudonymous IMSI Does Not Change

osmith

04/08/2020

01:38 PM Revision cbe90581 (imsi-pseudo): spec: end to end enc

osmith

01:26 PM Revision 18bf9bb1 (imsi-pseudo): spec: ATT = 0

osmith

12:58 PM Revision bb8d9127 (imsi-pseudo): spec: write section: reference implementation

osmith

12:37 PM Revision 5de45c08 (imsi-pseudo): spec: error scenarios

osmith

08:39 AM Revision 7b0dbb96 (imsi-pseudo): docs/spec: SMS structure

osmith

06:58 AM Revision 64d154ce (imsi-pseudo): spec: next pseudo_imsi_timer expires

osmith

04/07/2020

02:02 PM Revision ef43ac3a (imsi-pseudo): spec: write out until Insert Subscriber Data Result

osmith

01:05 PM Revision 7e33ef5e (imsi-pseudo): spec: add cancel location req to graph

osmith

12:51 PM Revision 92a2288f (imsi-pseudo): spec: elaborate on how optional this is

osmith

12:51 PM Revision 206a0fa9 (imsi-pseudo): spec: Process Update_Location_HLR: bullet points + graph

osmith

07:38 AM Revision 8b68e4ec (imsi-pseudo): spec: describe SIM applet

osmith

07:38 AM Revision 9748cdc6 (imsi-pseudo): IMSIPseudo.java: Cosmetic: fix missing space

osmith

07:36 AM Feature #4486 (New): Applet: gracefully handle case where timer is set twice

While working on the spec, I realize that we should cover this case too:
* SMS arrives, timer is set to 5 minutes ... osmith

06:44 AM Revision 8c81b556 (imsi-pseudo): spec: minor fixes

osmith

04/06/2020

01:46 PM Revision bf33c75a (imsi-pseudo): spec: Pseudonymous IMSI Storage in the HLR

osmith

12:29 PM Revision 6f9f2186 (imsi-pseudo): spec: use 2g example throughout the document

osmith

12:14 PM Revision 2c8a19c1 (imsi-pseudo): spec: re-organize headlines

osmith

11:34 AM Revision 7afd7010 (imsi-pseudo): spec: describe LU without pseudo IMSI

osmith

04/03/2020

12:04 PM Revision 5616ae82 (imsi-pseudo): specification.md: mark as deprecated

osmith

12:03 PM Revision 5c95bc9c (imsi-pseudo): spec: introduction, headlines

osmith

07:00 AM Revision 2baa0d53 (imsi-pseudo): doc: prepare for asciidoc based specification

osmith

04/02/2020

08:18 PM Feature #4402: Specification: Create draft

osmith wrote:
> https://gerrit.osmocom.org/plugins/gitiles/imsi-pseudo/+/refs/heads/master/README.md
>
> @lafor... laforge

01:15 PM Revision 4a3d8d3f (imsi-pseudo): docs/specification.md: note Process Update_Location_HLR

osmith

01:10 PM Feature #4476: OsmoHLR: support IMSI pseudo in location update

Regarding "LU: purge subscriber in VLR": the right GSUP procedure is Location Cancellation (Purge MS would be the opp... osmith

04/01/2020

02:00 PM Feature #4476: OsmoHLR: support IMSI pseudo in location update

WIP branch: osmith/imsi-pseudo osmith

08:40 AM Feature #4476 (In Progress): OsmoHLR: support IMSI pseudo in location update

osmith

08:05 AM Feature #4476 (Stalled): OsmoHLR: support IMSI pseudo in location update

Columns for subscriber_imsi_pseudo table ("reference":https://gerrit.osmocom.org/plugins/gitiles/imsi-pseudo#in-detai... osmith

11:06 AM Bug #4480: Applet/OsmoMSC: fix or workaround for OsmoMSC only paging attached MS

laforge wrote:
> I think it is unrealistic to assume that anyone would ever want to page subscribers
> that are not... osmith

10:30 AM Bug #4480: Applet/OsmoMSC: fix or workaround for OsmoMSC only paging attached MS

I think it is unrealistic to assume that anyone would ever want to page subscribers
that are not attached. It drasti... laforge

08:28 AM Bug #4480 (New): Applet/OsmoMSC: fix or workaround for OsmoMSC only paging attached MS

We have to set the "channel-description attach 0" option in OsmoBSC, so the MS does not detach from the network when ... osmith

08:34 AM Feature #4481 (New): Applet: test various REFRESH qualifiers to possibly shorten the time for changing the IMSI

@neels started a nice wiki page here: https://osmocom.org/projects/imsi-pseudo/wiki/Baseband_behavior_on_IMSI_change
... osmith

08:18 AM Feature #4479 (New): Applet: change IMSI after receiving SMS

When receiving the change IMSI SMS from OsmoHLR:
* verify the counter (prevent replay attacks / locking out if SMS a... osmith

08:14 AM Feature #4478 (New): Applet: proper warning after too many LU with same IMSI

In the current proof of concept, a message is shown after each location update. The current counter mechanism only wo... osmith

08:07 AM Feature #4477 (New): OsmoHLR: send next pseudo IMSI via SMS

* after successful LU with the newer pseudo IMSI, the old one gets deallocated (#4476)
* wait for some time
* alloc... osmith

07:31 AM Feature #4404 (Stalled): Research: Make sure that we can silently detach the IMSI

@laforge will send us OsmocomBB phones to test for ATT=0 in German real-world networks. osmith

03/31/2020

10:32 AM Feature #4404: Research: Make sure that we can silently detach the IMSI

osmith wrote:
> > How does a SIM/baseband behave when its IMSI is changed?
>
> When I checked last month on a fea... osmith

10:23 AM Revision 1acc89b8 (imsi-pseudo): README.md: SIM must not perform IMSI detach

osmith

10:12 AM Revision c4206534 (imsi-pseudo): README.md: improve headlines

osmith

10:09 AM Revision 8c3bd0b4 (imsi-pseudo): README: add user-configurable minimum duration

osmith

03/27/2020

04:08 PM Feature #4404 (In Progress): Research: Make sure that we can silently detach the IMSI

osmith

04:07 PM Feature #4404: Research: Make sure that we can silently detach the IMSI

> How does a SIM/baseband behave when its IMSI is changed?
When I checked last month on a feature phone, changing ... osmith

12:43 PM Feature #4400 (Resolved): Approach C: HLR decides and sends the entire next pseudo IMSI to SIM

This is the approach we will describe in our spec and implement. Closing. osmith

12:33 PM Feature #4402 (In Progress): Specification: Create draft

As discussed in the weekly telcos, the draft specification does not need to contain the exact references to ETSI spec... osmith

12:12 PM Revision 6d06adb8 (imsi-pseudo): README.md: fix typo

osmith