[145585] in cryptography@c2.net mail archive
Re: GSM eavesdropping
daemon@ATHENA.MIT.EDU (John Kemp)
Mon Aug 2 13:20:10 2010
From: John Kemp <john@jkemp.net>
In-Reply-To: <20100802110831.14271fde@jabberwock.cb.piermont.com>
Date: Mon, 2 Aug 2010 12:45:46 -0400
Cc: Bill Squier <groo@old-ones.com>,
Cryptography <cryptography@metzdowd.com>
To: "Perry E. Metzger" <perry@piermont.com>
On Aug 2, 2010, at 11:08 AM, Perry E. Metzger wrote:
> On Mon, 2 Aug 2010 11:02:54 -0400 Bill Squier <groo@old-ones.com>
> wrote:
>> "...In his presentation at the Black Hat Conference, German GSM
>> expert Karsten Nohl presented a tool he calls Kraken, which he
>> claims can crack the A5/1 encryption used for cell phone calls
>> within seconds."
>>=20
>> =
http://www.h-online.com/security/news/item/Quickly-decrypting-cell-phone-c=
alls-1048850.html
>=20
> This is a really important development.
Others have previously cracked A5/1, and Mr Nohl's efforts are not news: =
http://www.pcworld.com/businesscenter/article/185552/gsm_encryption_cracke=
d_showing_its_age.html but the main thing here appears to be the =
compilation of the rainbow tables.
Also, it's worth noting that the GSMA has had A5/3 GSM encryption =
available =
(http://gsmworld.com/documents/a5_3_and_gea3_specifications.pdf -- PDF) =
since 2008, but that the improved technology has apparently not yet seen =
large-scale adoption by mobile operators.=20
Regards,
- johnk
> --=20
> Perry E. Metzger perry@piermont.com
>=20
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