Full Disclosure mailing list archives
Re: Israeli boffins crack GSM code
From: Damian Gerow <damian () sentex net>
Date: Tue, 9 Sep 2003 17:08:54 -0400
Thus spake Gregory A. Gilliss (ggilliss () netpublishing com) [09/09/03 14:11]:
Sorry, which GSM code would this be? Because I distinctly remember being at a party years ago where the GSM code (some weak variant of A5) was shown to be weak and hackable. This was back in 1998...
Discussion on the cryptography mailing list indicated that all this does is force a downgrade from A5/3 to A5/2, which can then be cracked. I can't find the archives online, so I'll paraphrase... The attack forces the terminal end of the call to use A5/2, which is known to be insecure. It then cracks the key, and continues to use this cracked key for A5/3. A5/3 itself still hasn't been cracked, it looks like it's just the initial negotiation. _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.netsys.com/full-disclosure-charter.html
Current thread:
- Israeli boffins crack GSM code Richard Spiers (Sep 09)
- RE: Israeli boffins crack GSM code Kevin Spett (Sep 09)
- Re: Israeli boffins crack GSM code Gregory A. Gilliss (Sep 09)
- RE: Israeli boffins crack GSM code Kevin Spett (Sep 09)
- Re: Israeli boffins crack GSM code Damian Gerow (Sep 09)
- Re: Israeli boffins crack GSM code Damian Gerow (Sep 09)
- Re: Israeli boffins crack GSM code Richard Spiers (Sep 10)
- Re: Israeli boffins crack GSM code Johan Denoyer (Sep 10)
- Re: Israeli boffins crack GSM code vosipov (Sep 10)
- <Possible follow-ups>
- RE: Israeli boffins crack GSM code Rainer Gerhards (Sep 09)
- Re: Israeli boffins crack GSM code Adam Shostack (Sep 09)