TLS 1.3 is the new version of TLS that is being finalized by the IETF. Currently the spec is pretty much settled, except for a debate regarding the ability to do inspection (MITM decryption). This gist has links relevant to TLS 1.3 and the enterprise network inspection debate.
Overview of TLS 1.3
- Summary from CloudFlare https://blog.cloudflare.com/tls-1-3-overview-and-q-and-a/
- Video from 33c3 https://blog.cloudflare.com/tls-1-3-explained-by-the-cloudflare-crypto-team-at-33c3/