https://groups.google.com/a/chromium.org/g/blink-dev/c/CmlXjQeNWDI
Intent to Ship: TLS Encrypted Client Hello (ECH)
intent to shipencrypted client hellotlsech
https://www.ietf.org/archive/id/draft-ietf-tls-esni-08.html
TLS Encrypted Client Hello
This document describes a mechanism in Transport Layer Security (TLS) for encrypting a ClientHello message under a server public key.
tlsencryptedclienthello