The Backend Engineering Show with Hussein Nasser

Encrypted Client Hello - The Pros & Cons

The Backend Engineering Show with Hussein Nasser

Show Notes

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

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