> Sorry to nitpick but UDP seems like the wrong protocol for authentication. While authentication over UDP is indeed a bit more difficult if implementing it yo

> Sorry to nitpick but UDP seems like the wrong protocol for authentication. While authentication over UDP is indeed a bit more difficult if implementing it yourself, fortunately there is DTLS which is a very official and well-recognised way to implement authentication over UDP (very briefly - DTLS does make a handshake, and it does have a session, but this session operates in a packet-oriented mode which supports reordering and packet loss).