On 28.08.2014, at 01:57 , Felix Baumann <[email protected]> wrote:
> What do you guys think about working together with projects like these
> and helping them out:
> http://forum.xda-developers.com/showthread.php?t=1422969 
> <http://forum.xda-developers.com/showthread.php?t=1422969>

As an alternative URL, here’s their github repo: 
https://github.com/E3V3A/Android-IMSI-Catcher-Detector

> They are trying to make an IMSI-Catcher-Detector and probably need data
> from cells around the world to provide good results whether you are
> connected to an IMSI Catcher or not.

We and OpenCellID have both talked to them in the past.

As Chris pointed out, they’ll soon be able to download our cell data and use it 
for their purposes, though it’s not a particularly good fit. They’d be more 
interested in exact position of cell towers, whereas we care more about logical 
cells and where most people are inside those logical cell areas.

> MLS could share it's data with gsmmap.org <http://gsmmap.org> since the cell 
> database will
> be published soon. (they seem to use that map)
> 
> the mailing list of gsmmap:
> https://lists.srlabs.de/cgi-bin/mailman/listinfo/gsmmap 
> <https://lists.srlabs.de/cgi-bin/mailman/listinfo/gsmmap>

gsmmap is interested in a different set of data. For example what GSM 
encryption method is used by the provider (A5/1 vs. A5/3).

Capturing that information isn’t easy, and you need to actually make calls or 
send SMS to establish a connection. It’s not something you can passively 
collect. And it’s not something regular Android API’s expose, so you need to 
directly talk to the cell modem or SIM card.

That makes collaboration in terms of data gathering and exchange rather 
difficult.

Hanno
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