In a related story, hacker Chris Paget created his own cell-phone base station 
that turned off encryption on all devices connecting to it. The station then 
routes the calls through VoIP.

http://www.wired.com/threatlevel/2010/07/intercepting-cell-phone-calls/

-Adrian

On 2 Aug 2010, at 16:02, Bill Squier 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."
> 
> http://www.h-online.com/security/news/item/Quickly-decrypting-cell-phone-calls-1048850.html
> 
> -wps
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