RFC 9849 TLS Encrypted Client Hello March 2026 Rescorla, et al. Standards Track [Page] TLS Encrypted Client Hello Abstract This document describes a mechanism in Transport Layer Security (TLS) for encrypting a ClientHello message under a server public key.¶ Status of This Memo This is an Internet Standards Track document.¶ This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been appro...