{
  "draft": "draft-ietf-tls-8773bis-13",
  "doc_id": "RFC9973",
  "title": "TLS 1.3 Extension for Using Certificates with an External Pre-Shared Key",
  "authors": [
    "R. Housley"
  ],
  "format": [
    "XML",
    "TEXT",
    "HTML",
    "PDF"
  ],
  "page_count": "13",
  "pub_status": "PROPOSED STANDARD",
  "status": "PROPOSED STANDARD",
  "source": "Transport Layer Security",
  "abstract": "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.",
  "pub_date": "July 2026",
  "keywords": [
    "cryptography",
    "pre-shared key"
  ],
  "obsoletes": [
    "RFC8773"
  ],
  "obsoleted_by": [],
  "updates": [],
  "updated_by": [],
  "see_also": [],
  "doi": "10.17487/RFC9973",
  "errata_url": null
}