I'm interested in the end-to-end encryption via Linphone. I didn't see any information in the user guide:
http://www.linphone.org/user-guide.html I also searched the web but found very little except for a couple people saying they couldn't get it to work.
Currently I'm testing Linphone by making calls between a linphone account on my phone and a linphone account on my desktop.
On the phone, Linphone displays a red lock with a slash through it. Does that mean it is not encrypted? When I tap on the lock nothing happens. On the desktop I don't see any visual UI about encryption or secure communication.