{
  "$schema": "/api/schemas/documents.schema.json",
  "apiVersion": "1.1.0",
  "lastModified": "2026-10-20T21:46:14.579Z",
  "sourcePath": "src/main/data/docs",
  "docId": "RFC8547",
  "document": {
    "abstract": "Despite growing adoption of TLS, a significant fraction of TCP traffic on the Internet remains unencrypted. The persistence of unencrypted traffic can be attributed to at least two factors. First, some legacy protocols lack a signaling mechanism (such as a STARTTLS command) by which to convey support for encryption, thus making incremental deployment impossible. Second, legacy applications themselves cannot always be upgraded and therefore require a way to implement encryption transparently entirely within the transport layer. The TCP Encryption Negotiation Option (TCP-ENO) addresses both of these problems through a new TCP option kind providing out-of-band, fully backward-compatible negotiation of encryption.",
    "abstract$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML abstract",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc8547/",
      "updated": "2026-10-20T21:46:14.579Z",
      "version": "extractDocs.js@commit:92f3ced618ff"
    },
    "authors": [
      {
        "name": "Andrea Bittau"
      },
      {
        "name": "Daniel B. Giffin"
      },
      {
        "name": "Mark J. Handley"
      },
      {
        "name": "David Mazieres"
      },
      {
        "name": "Eric W. Smith"
      }
    ],
    "authors$meta": {
      "confidence": "high",
      "note": "Parsed from Datatracker doc page article:author (profile full names)",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc8547/",
      "updated": "2026-10-20T21:46:14.579Z",
      "version": "extractDocs.js@commit:92f3ced618ff"
    },
    "docId": "RFC8547",
    "docId$meta": {
      "confidence": "high",
      "note": "Derived from RFC number or Datatracker identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc8547/",
      "updated": "2026-10-20T21:46:14.579Z",
      "version": "extractDocs.js@commit:92f3ced618ff"
    },
    "docLabel": "IETF RFC 8547",
    "docLabel$meta": {
      "confidence": "high",
      "note": "Constructed from provider and document identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc8547/",
      "updated": "2026-10-20T21:46:14.579Z",
      "version": "extractDocs.js@commit:92f3ced618ff"
    },
    "docNumber": "8547",
    "docNumber$meta": {
      "confidence": "high",
      "note": "From the RFC index entry (rfc-index.xml <doc-id>)",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc8547/",
      "updated": "2026-10-20T21:46:14.579Z",
      "version": "extractDocs.js@commit:92f3ced618ff"
    },
    "docTitle": "TCP-ENO: Encryption Negotiation Option",
    "docTitle$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML title",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc8547/",
      "updated": "2026-10-20T21:46:14.579Z",
      "version": "extractDocs.js@commit:92f3ced618ff"
    },
    "docType": "Experimental",
    "docType$meta": {
      "confidence": "high",
      "note": "Mapped from Datatracker std_level or RFC status text",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc8547/",
      "updated": "2026-10-20T21:46:14.579Z",
      "version": "extractDocs.js@commit:92f3ced618ff"
    },
    "doi": "10.17487/RFC8547",
    "doi$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML doi",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc8547/",
      "updated": "2026-10-20T21:46:14.579Z",
      "version": "extractDocs.js@commit:92f3ced618ff"
    },
    "href": "https://doi.org/10.17487/RFC8547",
    "href$meta": {
      "confidence": "high",
      "note": "Derived from DOI (https://doi.org/<doi>)",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc8547/",
      "updated": "2026-10-20T21:46:14.579Z",
      "version": "extractDocs.js@commit:92f3ced618ff"
    },
    "keywords": [
      "TCP",
      "Encryption"
    ],
    "keywords$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML keywords",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc8547/",
      "updated": "2026-10-20T21:46:14.579Z",
      "version": "extractDocs.js@commit:92f3ced618ff"
    },
    "pages": "31",
    "pages$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML page-count",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc8547/",
      "updated": "2026-10-20T21:46:14.579Z",
      "version": "extractDocs.js@commit:92f3ced618ff"
    },
    "publicationDate": "2019-05-01",
    "publicationDate$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML date",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc8547/",
      "updated": "2026-10-20T21:46:14.579Z",
      "version": "extractDocs.js@commit:92f3ced618ff"
    },
    "publisher": "IETF",
    "publisher$meta": {
      "confidence": "high",
      "note": "Static: provider",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc8547/",
      "updated": "2026-10-20T21:46:14.579Z",
      "version": "extractDocs.js@commit:92f3ced618ff"
    },
    "references": {
      "bibliographic": [
        "RFC3493",
        "RFC4253",
        "RFC4987",
        "RFC5116",
        "RFC5382",
        "RFC5802",
        "RFC6394",
        "RFC6994",
        "RFC7413",
        "RFC7435",
        "RFC7616",
        "RFC8446"
      ],
      "bibliographic$meta": {
        "confidence": "medium",
        "flag": "MIXED_REF_LAYOUT_RISK anchored=19 proseBlocks=23 skippedAnchorBlocks=21",
        "note": "Parsed from RFC HTML references/informative sections",
        "originalValue": [],
        "reviewRequired": true,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc8547/",
        "updated": "2026-10-20T21:46:14.579Z",
        "version": "extractDocs.js@commit:92f3ced618ff"
      },
      "normative": [
        "NIST.SP.800-57",
        "RFC793",
        "RFC2119",
        "RFC4086",
        "RFC7120",
        "RFC8126",
        "RFC8174"
      ],
      "normative$meta": {
        "confidence": "high",
        "note": "Parsed from RFC HTML normative references sections",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc8547/",
        "updated": "2026-10-20T21:46:14.579Z",
        "version": "extractDocs.js@commit:92f3ced618ff"
      }
    },
    "resolvedHref": "https://www.rfc-editor.org/info/rfc8547/",
    "resolvedHref$meta": {
      "confidence": "high",
      "note": "Final URL resolved via URL redirect verification",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc8547/",
      "updated": "2026-10-20T21:46:14.579Z",
      "version": "extractDocs.js@commit:92f3ced618ff"
    },
    "status": {
      "active": true,
      "active$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc8547/",
        "updated": "2026-10-20T21:46:14.579Z",
        "version": "extractDocs.js@commit:92f3ced618ff"
      },
      "errataExist": false,
      "errataExist$meta": {
        "confidence": "high",
        "note": "Derived from presence of errata links on RFC/Datatracker pages",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc8547/",
        "updated": "2026-10-20T21:46:14.579Z",
        "version": "extractDocs.js@commit:92f3ced618ff"
      },
      "latestVersion": true,
      "latestVersion$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc8547/",
        "updated": "2026-10-20T21:46:14.579Z",
        "version": "extractDocs.js@commit:92f3ced618ff"
      },
      "statusNote": "Experimental",
      "statusNote$meta": {
        "confidence": "high",
        "note": "Mapped from Datatracker doc.json std_level",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc8547/",
        "updated": "2026-10-20T21:46:14.579Z",
        "version": "extractDocs.js@commit:92f3ced618ff"
      },
      "superseded": false,
      "superseded$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc8547/",
        "updated": "2026-10-20T21:46:14.579Z",
        "version": "extractDocs.js@commit:92f3ced618ff"
      }
    }
  }
}