Re: [Discuss-gnuradio] IMSI Catcher Catcher?

[Ralph A. Schmid, dk5ras]

Hi,

> Thank you!!!
> 
> That's exactly the kind of information I've been looking for.

These few words?! 

In fact all you need already exists, software to decode GSM network data
already exists; you just need to put the pieces of information together.
Means, look for MCCs/MNCs and ARFCNs, compare if they fit into the official
band plan, check the LAC and cell IDs and T3212 and other timers and flags
and have a look if they follow the official scheme...

Means, it is not only a matter of building some fancy device and writing
some fancy code, you have to take the local network situation into account.
The technical side is one thing, but intelligence is the main factor. There
won't be a device to tell for sure that a tower is rogue, there must be some
heuristics or some human that evaluates the data and knows the local
network, knows how it should look like, to determine what may be wrong.

Ralph.