TLS Encrypted Client Hello (ECH) Configuration Extensions

Created

• 2025-07-30

Last Updated

• 2026-04-16

Available Formats

• XML
• HTML
• TXT

TLS ECHConfig Extension

Registration Procedure(s)

• Specification Required

Expert(s)

• Rich Salz, Nick Sullivan

Reference

• RFC 9849: TLS Encrypted Client Hello

Note

The role of the designated expert is described in RFC 8447. The designated expert RFC 8126 ensures that the specification is publicly available. It is sufficient to have an Internet-Draft (that is posted and never published as an RFC) or a document from another standards body, industry consortium, university site, etc. The expert may provide more in-depth reviews, but their approval should not be taken as an endorsement of the extension.

Available Formats

• CSV