Encrypted calls - Cryptophone.de protocol
thomas at gstaedtner.net
Sat Aug 23 17:56:42 CEST 2008
Mikko Rauhala schrieb:
> ed for security review purposes only.
> However, they do also state that they have no problem with somebody else
That is really interesting!
We discussed this topic several times, but I think so far nobody had the
idea to use old fashioned CSD data calls.
I said myself it wouldn't be possible as getting encrypted data over GSM
voice calls is pretty much impossible and over GPRS the latency makes
calls useless, but this really seems to be a decent way.
Most GSM networks support 9.6k, some of the better networks 14.4k, what
means even with some overhead it should be possible to get 6-12k speex
over it, what should allow an acceptable voice quality.
More information about the devel