metasystema.org
CurrentPROPOSED STANDARDIETF stream

RFC 9973: TLS 1.3 Extension for Using Certificates with an External Pre-Shared Key

In plain English — editorial summary, not part of the RFC

This document specifies a TLS 1.3 extension that allows TLS clients and servers to authenticate with certificates and provide confidentiality based on encryption with a symmetric key from the usual key agreement algorithm and an external pre-shared key (PSK). This Standards Track RFC obsoletes RFC 8773, which was an Experimental RFC.

Document record

Document ID
RFC9973
Published
July 2026
Authors
R. Housley
Status
PROPOSED STANDARD
Stream
IETF
Area
sec
Pages
13
Also known as
—
Obsoletes:
RFC 8773

Topics

Related documents

Ranked automatically by shared keywords, IETF area and stream — not by editorial selection.

Also filed under

About this page

The document record above — title, authors, date, status, stream, area, relationships, DOI and errata — is imported verbatim from the public RFC Editor index. The “in plain English” section is editorial: written by The metasystema editorial team, not part of the RFC. Where the two differ, the RFC text governs.

Last checked against the RFC Editor index on . RFCs are never revised after publication; changes are issued as new documents.

Data sources · Editorial policy · Report a correction · What is an RFC?

canonical URL: /rfc/9973-tls-1-3-extension-for-using-certificates-with-an-external-pre-shared-key