[wbond]

My personal learning style generally involves learning in layers, and I would imagine a high-level overview of TLS 1.2 would be good since it provides some frame of reference before jumping into TLS 1.3, which from what I understand is an evolution of TLS 1.2 to provide better security. I seem to recall quite a bit of discussion during the development in regards to making TLS 1.3 look similar to TLS 1.2 for the sake of dealing with middleboxes.

If someone knows of a high-level document about 1.3 that goes through the handshake process and differences with 1.2, that would be a great reference to have!

[brians]

You can imagine it, but the person you’re replying to is closer. 1.3 is a ground-up redesign, packaged to not bother middleboxes that look for TLS 1.2.

The handshake process and difference is complete.

[blattimwind]

The cryptographic protocols of 1.3 could be said to be largely unrelated to 1.2. If you wanted to learn in layers then Noise is a lot closer to 1.3 than 1.2.

[wbond]

I'm not particularly interested in the cryptography specifically, but rather the network protocol, in order to be able to obtain information about the connection.