The Encrypted Client Hello or ECH is a new RFC that encrypts the TLS client hello to hide sensitive information like the SNI. In this video I go through pros and cons of this new rfc.

0:00 Intro

2:00 SNI

4:00 Client Hello

8:40 Encrypted Client Hello

11:30 Inner Client Hello Encryption

18:00 Client-Facing Outer SNI

21:20 Decrypting Inner Client Hello

23:30 Disadvantages

26:00 Censorship vs Privacy ECH

https://blog.cloudflare.com/announcing-encrypted-client-hello/

https://chromestatus.com/feature/6196703843581952