Voice over GPRS?

Crane, Matthew mcrane03 at harris.com
Fri Feb 2 18:54:14 CET 2007

With a point to point link what would be the minimal software stack
needed?  There's only so much CPU, might it be more appropriate to use a
relatively lightweight process to rx/tx+encrypt/decrypt the data?  

In any case, the idea of an open encryption standard for cell phone
communications is pretty appealing.

-----Original Message-----
From: community-bounces at lists.openmoko.org
[mailto:community-bounces at lists.openmoko.org] On Behalf Of Paul Wouters
Sent: Friday, February 02, 2007 12:29 PM
To: Mikko J Rauhala
Cc: community at lists.openmoko.org
Subject: Re: Voice over GPRS?

On Fri, 2 Feb 2007, Mikko J Rauhala wrote:

> Of course, you can make a GSM data call (I presume) and thus reserve

That's what www.cryptophone.de does to avoid latency issues. Some
block mobile to mobile data calls though.

> (Also, _this_ is how you can accomplish a proper encrypted phone call
> using the GSM network with Neo, if you're into security and don't mind
> it costing a bit.

It doesnt need to cost a bit. In fact, this is why I am on this list and
why I'll be getting a Neo phone. We presented at CCC:
The video is available at: http://chameleon.cypherpunks.ca/

In essence, a phone using Openswan, Xl2tpd, openvpn, pjsua, Jabberclient
talking to an
server running Openswan, Xl2tpd, openvpn, asterisk, jabber server.

We hope to have Neo firmware available before you can order the hardware

For more details, see our presentation.


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