Open Source GSM Cracking Software Released

angry tapir writes "The GSM technology used by the majority of the world's mobile phones will get some scrutiny at next week's Black Hat security conference. An open source effort to develop GSM-cracking software has released software that cracks the A5/1 encryption algorithm used by some GSM networks. Called Kraken, this software uses new, very efficient, encryption cracking tables that allow it to break A5/1 encryption much faster than before."