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IMSI Catcher - AKA GSM Sniffer

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#21 Lio


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Posted 17 October 2007 - 04:32 PM

if one is to get really involved with this i think USRP would be a good investment(together with studying gnu radio) - they use gnu radio for a5 cracking in that chaos communications congres video too(i think its on thc.org somewhere)

#22 Andre van dem Helge

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Posted 23 October 2007 - 06:55 PM

I recall something around 1999 or 2000 reading GSM encryption already had been cracked...

I some books that do a good job of explaining the GSM air interface I need to dig those up but I don't think a software radio would be adequate its not a simple analog transmission but there are more than 1 error correcting algorithms and to write a GSM radio from scratch would be a challenge... probably you'd gain the knowledge needed to just about anything on GSM.

Anyways I wonder if these cards would be of any use: http://www.junghanns...ci_produkt.html

#23 ac3bf1


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Posted 29 November 2007 - 06:54 AM

Hey all!
I am so happy to find a thread like this!
Anyways I am planning to develop my thesis on this area...
and possibly build an IMSI catcher within 3/ months. Possible? We will see!
I am based in the London, UK, and on our campus we have some good equipment we can use...

Possibly if someone wants to come over and work here I might be able to make you come down and work here.

Also I can get a budget for this project from the UNIV
which can help!

So where do we start?


#24 ac3bf1


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Posted 30 November 2007 - 01:21 PM

Useful links:



Edited by ac3bf1, 30 November 2007 - 02:01 PM.

#25 canet


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Posted 13 April 2008 - 08:59 PM

I want to know how to enjoy the gsm Software Project!

#26 happy_hax


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Posted 18 July 2014 - 06:23 PM

For all of you that are sick of all this BS and want to do something about it, here's a great project you should check out: The "Android-IMSI-Catcher-Detector (AIMSICD)". It is an Android open-source based project to detect and (hopefully one day) avoid fake base stations (IMSI-Catchers) or other base-stations (mobile antennas) with poor/no encryption. This project aim to warn users if the ciphering is turned off and also enables several other protection-mechanisms. Since it is under constant development, we constantly search for testers and security-enthusiastic developers with balls. Don't be shy, feel free to contribute, in any way you can. They're on GitHub and XDA.

Edited by happy_hax, 18 July 2014 - 07:02 PM.

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