I was at the talk. He didn't claim he cracked GSM and went over the history of the development of A5 attacks. He explained that their work is the first time the

I was at the talk. He didn't claim he cracked GSM and went over the history of the development of A5 attacks. He explained that their work is the first time the data necessary to crack A5 has been made public. This work is important because it is a major step towards producing a working open source real-time GSM cracker.