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by arcfour 61 days ago
CloudFlare has supported it since 2023: https://blog.cloudflare.com/announcing-encrypted-client-hell... Firefox has had it enabled by default since version 119: https://support.mozilla.org/en-US/kb/faq-encrypted-client-he... so you can use it today.
2 comments
1vuio0pswjnm7 61 days ago
"... so you can use it today."

What if he wanted to use it for requesting blog.cloudflare.com

   ;; ANSWER SECTION:
   blog.cloudflare.com. 300 IN HTTPS 1 . alpn="h3,h2" ipv4hint=104.18.28.7,104.18.29.7 ipv6hint=2606:4700::6812:1c07,2606:4700::6812:1d07
Where are the ECH keys

For example,

   ;; ANSWER SECTION:
   test.defo.ie. 300 IN HTTPS 1 . ech="AEb+DQBCqQAgACBlm7cfDx/gKuUAwRTe+Y9MExbIyuLpLcgTORIdi69uewAEAAEAAQATcHVibGljLnRlc3QuZGVmby5pZQAA"
or

   ;; ANSWER SECTION:
   cloudflare-ech.com. 300 IN HTTPS 1 . alpn="h3,h2" ipv4hint=104.18.10.118,104.18.11.118 ech="AEX+DQBBpQAgACB/RU5hAC5mXe3uOZtNY58Bc8UU1cd4QBxQzqirMlWZeQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA=" ipv6hint=2606:4700::6812:a76,2606:4700::6812:b76
It's true one can "use it today". One could use it for the past several years as well. The software has been around for a while

But ECH has never been consistently enabled for the general public beyond a small number of test sites that are only for testing ECH

link
bombcar 61 days ago
https://tls-ech.dev indicates that Safari doesn't support it, but Chrome does.
link
altairprime 61 days ago
That’s likely due to iOS/macOS not supporting it in production-default-enabled yet; there’s an experimental opt-in flag at the OS level, but Safari apparently hasn’t (yet) added a dev feature switch for it.

https://developer.apple.com/documentation/security/sec_proto...

Presumably anyone besides Safari can opt-in to that testing today, but I wouldn’t ship it worldwide and expect nice outcomes until (I suspect) after this fall’s 27 releases. Maybe someone could PR the WebKit team to add that feature flag in the meantime?

link