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Originally Posted by Tim H
I confess to not having listened to the interview but I wonder how big the market for this is? Air -interface encryption for both GSM and CDMA is extremely good and as far as I know there has not been a single reported incident of it being compromised outside a lab environment.
Even law enforcement agencies take their interception at the mobile switch exchange, obviously you don't have to follow the person around but also because they don't have the technology to decrypt the air-interface on the fly.
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This is not exactly correct. Air-interface encryption on GSM networks (A5.1, A5.2) has been shown to have many flaws and has been defeated as early as the 1990’s. Furthermore, On-the-fly decryptors are readily available for puchase. They are called "IMSI Catchers" or "GSM Interceptors".
At the same time, given that the GSM channel provides limited protection between the phone and base station, by way of A5.1, A5.2 encryption algorithms, the transmission between base stations is known to be completely unencrypted and so can be intercepted and listened to quite easily.
All yo need to do is a Google search on “
"GSM interception", and see how much information is available, from how it is done, to how and where to buy devices. If you do the same search on CDMA interception, you will also find articles on the compromise of CDMA.
In business, where trade secrets are of paramount importance, corporate espionage is rampant.
As far as no reported incidents go, just have a look at this link, this page is full of news stories from major networks relating to eavesdropping:
http://www.tetrascanner.com/gsm-scanners.html