[A51] Using multiple ATI cards

[Frank A. Stevenson]

I just supplemented my computer with a second 5850 card, and I am now
computing 2 tables at once. The instruction for doing this is rather
easy.

1) Make a new folder with gen_table.py and A5Brook.so
2) Download new table parameters to a51id.cgi
3) Write "export BRT_ADAPTER=1" before running gen_table.py

Thus the table will be calculated on the specified GPU (1)

Currently my computer is outputting 1000 chains / second. What I really
need now is for the python script to automatically fetch new table
parameters when a table has been completed (easy to do really, I may
comitt this soon).

But when I am not doing A51 (after all it is -25 centigrade outside) I
also wrote a Mandelbulb renderer. Sample video here (in HD):

http://www.youtube.com/watch?v=oe2bzLH65_A

Then I had a brainwave: Making a combined Mandelbulb + A5/1 screensaver
for the unwashed masses (Windows) should easily get us all the tables we
need :-)


Happy new year!

Frank 

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[A51] CCC Karsten Presentation (Mp3 and Mp4)

[javier falbo]

Hi,

I would like to share for those who could not attend the CCC, the Karsten 
Presentation in mp3 format and mp4.

Audio Mp3:
http://mirror.fem-net.de/CCC/26C3/mp3/26c3-3654-en-gsm_srsly.mp3

Video Mp4:
http://mirror.fem-net.de/CCC/26C3/mp4/26c3-3654-en-gsm_srsly.mp4

BONUS TRACK:
All CCC presentations here :)
http://mirror.fem-net.de/CCC/26C3/



Interesting slide: 
Playing with the GSM RF 
Interfacehttp://events.ccc.de/congress/2009/Fahrplan/attachments/1500_Playing_with_the_GSM_RF_Interface

(NOTE: Just add ".pdf" at the end of the downloaded file in order to be viewed 
correctly in Adobe Acrobat)


Javier
  
_
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Re: [A51] CCC Karsten Presentation (Mp3 and Mp4)

[Jacques _]

Thanks !

On Thu, Dec 31, 2009 at 2:32 PM, javier falbo wrote:

>  Hi,
>
> I would like to share for those who could not attend the CCC, the Karsten
> Presentation in mp3 format and mp4.
>
> Audio Mp3:
> http://mirror.fem-net.de/CCC/26C3/mp3/26c3-3654-en-gsm_srsly.mp3
>
> Video Mp4:
> http://mirror.fem-net.de/CCC/26C3/mp4/26c3-3654-en-gsm_srsly.mp4
>
> BONUS TRACK:
> All CCC presentations here :)
> http://mirror.fem-net.de/CCC/26C3/
>
>
>
> Interesting slide:
> Playing with the GSM RF Interface
> http://events.ccc.de/congress/2009/Fahrplan/attachments/1500_Playing_with_the_GSM_RF_Interface
>
> (NOTE: Just add ".pdf" at the end of the downloaded file in order to be
> viewed correctly in Adobe Acrobat)
>
>
> Javier
>
> --
> ¿Cansado de borrar spam de tu bandea de entrada? ¡Ganá tiempo con el nuevo
> filtro anti spam de Hotmail! 
>
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>
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Re: [A51] CCC Karsten Presentation (Mp3 and Mp4)

[omes]

I second that thanks!

--
- omes
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[A51] a51_rt_2272.torrent - 403

[R00T[ATI]]

Hello,
i can't download a51_rt_2272.torrent because apache replay me: 403
Wrong chmod?

Let me know
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[A51] A51 RT also available on Megaupload

[R00T[ATI]]

If you prefer, you can download A51 RT from Megaupload too:
h**ps://www.ihteam.net/blog/hacking-news/via-al-download-delle-rainbowtables-per-a5/

Regards
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[A51] GSMA Statement on Media Reports Relating to the Breaking of GSM Encryption

[javier falbo]

Here i include the GSM Association feedback from the breaking of GSM. Below, my 
comments.
http://www.gsmworld.com/newsroom/index.htm

GSMA Statement on Media Reports Relating to the Breaking of GSM 
Encryption
  
  
30 December 2009
  

  
GSM networks use encryption technology to make it difficult for
criminals to intercept and eavesdrop on calls. On most GSM networks,
the communications link between the handset and the radio base station
uses the A5/1 privacy algorithm to scramble the signal. 

   Over the past few years, a number of
academic papers setting out, in theory, how the A5/1 algorithm could be
compromised have been published. However, none to date have led to a
practical attack capability being developed against A5/1 that can be
used on live, commercial GSM networks. 

   Reports of an imminent GSM
eavesdropping capability are common. The GSMA, which welcomes research
designed to improve the security of communications networks, routinely
monitors the work of groups in this area. In 2007-8, a hacking group
claimed to be building an attack on A5/1 by constructing a large
look-up table1 of approximately 2 Terabytes – this is equivalent to the
amount of data contained in a 20 kilometre high pile of books. In
theory, someone with access to the data in such a table could use it to
analyse an encrypted call and recover the encryption key. 

   Another group has announced similar
plans in 2009. However, before a practical attack could be attempted,
the GSM call has to be identified and recorded from the radio
interface. 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. A hacker would need a radio receiver system and
the signal processing software necessary to process the raw radio data.
The complex knowledge required to develop such software is subject to
intellectual property rights, making it difficult to turn into a
commercial product. 

   Today, mobile networks are typically
configured to optimise call set-up times, capacity and other aspects
related to operational efficiency. But mobile operators could, if it
ever proved necessary, quickly alter these configurations to make the
interception and deciphering of calls considerably harder. Moreover,
intercepting a mobile call is likely to constitute a criminal offence
in most jurisdictions. 

   All in all, we consider this research,
which appears to be motivated in part by commercial considerations, to
be a long way from being a practical attack on GSM. More broadly, A5/1
has proven to be a very effective and resilient privacy mechanism. By
comparison, inexpensive and readily available radio scanners could be
used to intercept calls on the analogue cellular networks that
pre-dated GSM and which did not use encryption. 

   The mobile industry is committed to
maintaining the integrity of GSM services and the protection and
privacy of customer communications is at the forefront of operators’
concerns. The GSMA has been working to further enhance privacy
protection on GSM networks and has developed a new high-strength
algorithm, A5/3. Over the past decade, export control agencies have
removed many of the traditional barriers to the sale of cryptographic
technologies enabling the development and use of A5/3. This new privacy
algorithm is being phased in to replace A5/1. 



--
Comments:


1) "none to date have led to a
practical attack capability being developed against A5/1 that can be
used on live, commercial GSM networks" :  

Reply: Yes. There are many commercial companies that are offering them for u$s 
500.000.-!
For instance:
http://www.shoghi.co.in/passive_gsm_interception.htm
More here: http://gsm.my1.ru/load/


2) "a hacking group
claimed to be building an attack on A5/1 by constructing a large
look-up table1 of approximately 2 Terabytes – this is equivalent to the
amount of data contained in a 20 kilometre high pile of books".
Reply: What does it means 20 kilometers of books? je. It is a CHILD 
comparison... :)

Or simply buy a hard disk from Western Digital (Less than u$s 900)

http://www.wdc.com/en/products/Products.asp?DriveID=733


3) The complex knowledge required to develop such software is subject to
intellectual property rights, making it difficult to turn into a
commercial product. 
Reply: There is NO copyright materials in coding an Opensource software. GNU 
Radio is a good example.


4) Moreover,
intercepting a mobile call is likely to constitute a criminal offence
in most jurisdictions. 

Reply: Wrong Statement, completely wrong. Any judge or the justice could order 
to intercept a call. Intercepting or decoding your own phone is not a crime (or 
it is a crime that they encrpyt your voice without permission?). Intercepting 
third-parties phones is a cr

Re: [A51] GSMA Statement on Media Reports Relating to the Breaking of GSM Encryption

[Gregory Maxwell]

On Thu, Dec 31, 2009 at 5:28 PM, javier falbo  wrote:
[snip]
> networks, routinely monitors the work of groups in this area. In 2007-8, a
> hacking group claimed to be building an attack on A5/1 by constructing a
> large look-up table1 of approximately 2 Terabytes – this is equivalent to
> the amount of data contained in a 20 kilometre high pile of books. In
> theory, someone with access to the data in such a table could use it to
> analyse an encrypted call and recover the encryption key.
> Another group has announced similar plans in 2009. However, before a
> practical attack could be attempted, the GSM call has to be identified and
> recorded from the radio interface. 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. A hacker would need a radio receiver system and the
> signal processing software necessary to process the raw radio data. The

Hilarious.

But really— this is what you get for not running a demo: Continued
lies and misdirection from an industry which has had many years to get
its act straight but hasn't.


http://myrandomnode.dyndns.org:8080/~gmaxwell/omg_radios.jpg
I would have added a 2TB hdd and a GTX275 to the picture but that
would have required pulling them out of busy systems.  This is such a
joke— not only is the attack possible, its relatively cheap to
perform.
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