This is the gist of the TLS 1.3 Handshake you need to understand TLS. TLS 1.3's handshake includes many optimizations to the prior TLS 1.2 handshake, by making fewer round-trips and only using securing ciphers and key exchange algorithms. This is one of the many videos in the mini-series of HTTPS 0:00 Intro 0:30 Client Hello 2:30 Server Hello & Server Finish 2:50 Client Finish 3:29 Communication with AEAD encryption