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Revision 12 (Karsten, 12/20/2013 01:41 PM) → Revision 13/16 (Karsten, 09/22/2016 10:47 AM)
h3. Overview
This open source software allows the 'cracking' of A5/1 keys used to secure GSM 2G calls and SMS.
The cracking unitity Kraken, developed by Frank A. Stevenson, is written in C++/python and targets AMD (ATI) GPUs and CPUs.
h3. Mailing list
A public mailing list for announcements and discussion can be found "here":http://lists.srlabs.de/cgi-bin/mailman/listinfo/a51 .
Please fill bugs and support requests through the "issue tracker":http://opensource.srlabs.de/projects/a51-decrypt/issues/new as they may be of little relevance to the majority of the mailing list subscribers.
h3. Code
The (read only) Kraken git can be fetched with
<pre>
git clone git://git.srlabs.de/kraken
</pre>
h3. Related projects
The A5/1 decryption was originally meant to be used with "Airprobe":http://airprobe.org), which allows interfacing with the radio waves with
the help of gnuradio. "This tutorial":https://srlabs.de/airprobe-how-to/ explains the decryption process.
Airprobe has, for most users, since been replaced by the cheaper "Osmocom phones":http://bb.osmocom.org
h3. Further reading
[[A51|Cryptoanalysis in greater detail]]