funsec mailing list archives

Re: GSMA statement on media reports relating to the breaking of GSM encryption


From: Juha-Matti Laurio <juha-matti.laurio () netti fi>
Date: Mon, 11 Jan 2010 14:01:50 +0200 (EET)

I'm not sure if this was posted to list already:

"The demonstration of cracking A5/1 at 26C3 planed for today [30th Dec] is canceled."

http://events.ccc.de/congress/2009/wiki/Workshops#Day_4_-_2009-12-30_Wed
http://events.ccc.de/congress/2009/wiki/The_demonstration_is_canceled

Juha-Matti

Juha-Matti Laurio [juha-matti.laurio () netti fi] kirjoitti: 
'Cellular group says mobile calls safe from hackers':
http://www.reuters.com/article/idUSTRE60641G20100107

"The London-based GSM Association said on Thursday that it has spent the past few years figuring out
ways to thwart hackers who might try to tap into wireless calls using Nohl's research,
which it first learned of in 2007.

GSM Association engineers have figured out a short-term solution to block eavesdroppers, said James Moran,
head of security for the association.
It involves making slight changes to the settings in each wireless operator's network.

Carriers can quickly make those adjustments by tweaking existing features in the technology, Moran said in an 
interview."
--clip--

Juha-Matti

Gadi Evron [ge () linuxbox org] kirjoitti: 
On 1/2/10 7:28 AM, Dan Kaminsky wrote:
Pay no attention to the relatively large number of open source GSM base
stations in development and preliminary deployment.

The statement is just funny as GSM was completely broken years ago, I am 
proud to say, largely by Israeli researchers at the Technion institute, 
Elad Barkan and Eli Biham, as far as I know, as they share credit with 
some others for previous work.

http://tx.technion.ac.il/~barkan/academic/index.html

This guy at CCC made it practical for the layman.

So them saying it hasn't been explained in details is ridiculous.

    Gadi.



On Fri, Jan 1, 2010 at 8:46 PM, Les Bell <lesbell () lesbell com au
<mailto:lesbell () lesbell com au>> wrote:


    Juha-Matti Laurio <juha-matti.laurio () netti fi
    <mailto:juha-matti.laurio () netti fi>> wrote:

     >>
    GSM Association has posted their statement
    <<

     From the statement:

    "So far, this aspect of the methodology has not been explained in any
    detail and we strongly suspect that the teams attempting to develop an
    intercept capability have underestimated its practical complexity."

    So, it's business as usual for the telecommunications industry, then:
    security by obscurity. Yep, that'll work.

    Best,

    --- Les Bell
    [http://www.lesbell.com.au]
    Tel: +61 2 9451 1144


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-- 
Gadi Evron,
ge () linuxbox org.

Blog: http://gevron.livejournal.com/

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