[General] tox multi-party audio encryption

[VovansystemS]

Hi,

Recently, I have figured out that WebRTC does not provide end-to-end
encryption, nor does ZRTP!

http://lists.jitsi.org/pipermail/dev/2014-March/020318.html
https://openitp.org/design-review/open-source-secure-voice-tools-lay-of-land.html

Does tox provide end-to-end encryption for multi-party audio calls?

( I've read https://wiki.tox.chat/users/techfaq and I know that "All
Tox communications (text, audio, video, file transfers, etc) are
encrypted", but what is an algorithm used for MP voice encryption? how
does it work? )