Phone Call Security

Mikko Rauhala mjrauhal at
Sun Jun 3 15:08:49 CEST 2007

su, 2007-06-03 kello 07:08 +0200, Ortwin Regel kirjoitti:
> IIRC there has been lots of discussion about this a few months back.
> Take a look at the mailing list archives or the wiki if you can find
> it!

Spesifically, see subjects "Voice over GPRS?" and "Encrypting
voice communications" in the February archive page at

Summary: Possible to code support for this using GSM data calls (not GSM
voice calls due to GSM chip restrictions), which come with the quality
of service GPRS lacks. May cost a bit extra depending on your provider.
Compatibility with probably possible, since their
protocol seems to be up for reimplementation. Either way, at least
Moko-to-Moko encrypted calls are quite possible to implement, just that
somebody (TM) needs to do the work.

Mikko Rauhala <mjrauhal at>
University of Helsinki

More information about the community mailing list