Encrypting voice comunications..
laforge at openmoko.org
Sat Feb 3 15:08:18 CET 2007
On Fri, Feb 02, 2007 at 07:13:12PM +0200, Mikko J Rauhala wrote:
> On pe, 2007-02-02 at 09:06 -0800, Tim Newsom wrote:
> > If we have access to the mic and speakers while a call is in process,
> > and we have the ability to record conversations etc... Where does the
> > processor sit in that chain? Can we consume the voice, encrypt it and
> > feed an encrypted datastream back out to the gsm module which would
> > transmit it and another neo1973 user could receive the stream, process
> > through decryption and play out?
> No. The GSM processor does its own audio de- and encoding, and its
> connection to the audio i/o is analog, as reported by LaF0rge on irc a
> while back (any misunderstanding is probably mine if present, though).
> We can get at the audio via the a/d converters, but not do anything
> really fancy directly.
> Thus, I refer you to my last mail; make a GSM data call (phone-to-phone
> if possible,
Yes, that's also how commercial products like GSMK's cryptophone work
- Harald Welte <laforge at openmoko.org> http://openmoko.org/
Software for the world's first truly open Free Software mobile phone
More information about the community