Attacking the QUIC handshake

QUIC is an encrypted control protocol. That’s a big difference with TCP, and it prevents some of the known attacks against TCP, such as a third party sending a TCP “Reset” packet (RST) and closing a TCP connection. In QUIC, the equivalent of the RST packet would be a “Connection Close”. It will only be accepted if sent inside an encrypted packet, and once the connection is established only the two…