> Oh errh yes. Channel hopping is really a hurdle.
> Not everyone knows how to multiply with a sin/cos and how to filter
> afterwards ;) (kidding)
frequency shift in host only if you have the IQ data for the whole
band. Can't do that with a USRP or cheap modified phone hw.
But sure if you can capture and record the whole band and then can
process the ciphered TCH assignements (to get the hopping sequence)
offline, there is no issues.
That's the first workaround I listed in my original mail.
> But the most "interesting" part for criminals would be SMS communication
> (intercepting homebanking TANs and such stuff).
> And in my hopping cells, I haven't seen a hopping SDCCH yet. Did anyone?
> Not sure if they are possible at all :)
Of course they are possible ... my local cell always used SDCCH8
hopping among 32 ARFCNs spread over the GSM900 spectrum.
Cheers,
Sylvain
_______________________________________________
A51 mailing list
[email protected]
http://lists.lists.reflextor.com/cgi-bin/mailman/listinfo/a51
