Asterisk & chan_mobile + raspberry pi + encryption GSM


I have an idea that I would like to present to anyone who can advise me if it is a good one or a bad one. I want to develop an asterisk module that will encrypt the voice data that comes through a sip channel and forward it to a Bluetooth connected device. I understood that asterisk + chan_mobile will do the trick for some mobile phones. I need some pointers of how can I do this or why I can’t do this. Basically, I am trying to simulate a “vpn” connection through asterisk over GSM( 3G, etc. won’t do ). Asterisk PBX will run on a raspberry pi with connection to the Bluetooth device and an ad-hoc network. The client(s) will connect through wireless. At the other end there will be a similar device.

Waiting for any advice.

No answer after 50 views. Did I posted in the wrong category?

It was the wrong forum (should be Asterisk Support), but the real reason is that you have a very unusual configuration, and it is unlikely that anyone has relevant experience.