I also think that it's implied, maybe like Telegram Private Chat - when you need to wait the peer to go online before complete the key exchange. However when s

I also think that it's implied, maybe like Telegram Private Chat - when you need to wait the peer to go online before complete the key exchange. However when scale to a group with N peers.. we need to wait all of them, maybe they do waking up the peer's via Silent Notification or something like that.. Yeah it's a real fight usability vs security.