{
  "$schema": "/api/schemas/documents.schema.json",
  "apiVersion": "1.1.0",
  "lastModified": "2026-10-16T18:57:05.525Z",
  "sourcePath": "src/main/data/docs",
  "docId": "RFC6238",
  "document": {
    "abstract": "This document describes an extension of the One-Time Password (OTP) algorithm, namely the HMAC-based One-Time Password (HOTP) algorithm, as defined in RFC 4226, to support the time-based moving factor. The HOTP algorithm specifies an event-based OTP algorithm, where the moving factor is an event counter. The present work bases the moving factor on a time value. A time-based variant of the OTP algorithm provides short-lived OTP values, which are desirable for enhanced security. The proposed algorithm can be used across a wide range of network applications, from remote Virtual Private Network (VPN) access and Wi-Fi network logon to transaction-oriented Web applications. The authors believe that a common and shared algorithm will facilitate adoption of two-factor authentication on the Internet by enabling interoperability across commercial and open-source implementations. This document is not an Internet Standards Track specification; it is published for informational purposes.",
    "abstract$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML abstract",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6238/",
      "updated": "2026-10-16T18:57:05.524Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "authors": [
      {
        "name": "David M'Raihi"
      },
      {
        "name": "Salah Machani"
      },
      {
        "name": "Mingliang Pei"
      },
      {
        "name": "Johan Rydell"
      }
    ],
    "authors$meta": {
      "confidence": "high",
      "note": "Parsed from Datatracker doc page article:author (profile full names)",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6238/",
      "updated": "2026-10-16T18:57:05.525Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "docId": "RFC6238",
    "docId$meta": {
      "confidence": "high",
      "note": "Derived from RFC number or Datatracker identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6238/",
      "updated": "2026-10-16T18:57:05.524Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "docLabel": "IETF RFC 6238",
    "docLabel$meta": {
      "confidence": "high",
      "note": "Constructed from provider and document identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6238/",
      "updated": "2026-10-16T18:57:05.524Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "docNumber": "6238",
    "docNumber$meta": {
      "confidence": "high",
      "note": "Parsed from RFC info page report metadata",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6238/",
      "updated": "2026-10-16T18:57:05.524Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "docTitle": "TOTP: Time-Based One-Time Password Algorithm",
    "docTitle$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML title",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6238/",
      "updated": "2026-10-16T18:57:05.524Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "docType": "Informational",
    "docType$meta": {
      "confidence": "high",
      "note": "Mapped from Datatracker std_level or RFC status text",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6238/",
      "updated": "2026-10-16T18:57:05.524Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "doi": "10.17487/RFC6238",
    "doi$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML doi",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6238/",
      "updated": "2026-10-16T18:57:05.525Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "href": "https://doi.org/10.17487/RFC6238",
    "href$meta": {
      "confidence": "high",
      "note": "Derived from DOI (https://doi.org/<doi>)",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6238/",
      "updated": "2026-10-16T18:57:05.524Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "keywords": [
      "OTP",
      "OATH",
      "HOTP",
      "Two Factor Authentication",
      "Strong Authentication"
    ],
    "keywords$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML keywords",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6238/",
      "updated": "2026-10-16T18:57:05.525Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "pages": "16",
    "pages$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML page-count",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6238/",
      "updated": "2026-10-16T18:57:05.525Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "publicationDate": "2011-05-01",
    "publicationDate$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML date",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6238/",
      "updated": "2026-10-16T18:57:05.524Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "publisher": "IETF",
    "publisher$meta": {
      "confidence": "high",
      "note": "Static: provider",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6238/",
      "updated": "2026-10-16T18:57:05.524Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "references": {
      "bibliographic": [
        "RFC4301",
        "RFC5246",
        "RFC6030",
        "orphan/RFC6238/h:d1310bca",
        "orphan/RFC6238/h:df291e57"
      ],
      "bibliographic$meta": {
        "confidence": "medium",
        "flag": "MIXED_REF_LAYOUT_RISK anchored=10 proseBlocks=13 skippedAnchorBlocks=11",
        "note": "Parsed from RFC HTML references/informative sections",
        "originalValue": [],
        "reviewRequired": true,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6238/",
        "updated": "2026-10-16T18:57:05.525Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      },
      "normative": [
        "RFC2104",
        "RFC2119",
        "RFC4086",
        "RFC4226",
        "NIST.FIPS.180-3"
      ],
      "normative$meta": {
        "confidence": "high",
        "note": "Parsed from RFC HTML normative references sections",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6238/",
        "updated": "2026-10-16T18:57:05.525Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      }
    },
    "resolvedHref": "https://www.rfc-editor.org/info/rfc6238/",
    "resolvedHref$meta": {
      "confidence": "high",
      "note": "Final URL resolved via URL redirect verification",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6238/",
      "updated": "2026-10-16T18:57:05.525Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "status": {
      "active": true,
      "active$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6238/",
        "updated": "2026-10-16T18:57:05.525Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      },
      "errataExist": true,
      "errataExist$meta": {
        "confidence": "high",
        "note": "Derived from presence of errata links on RFC/Datatracker pages",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6238/",
        "updated": "2026-10-16T18:57:05.525Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      },
      "errataUrl": [
        "https://www.rfc-editor.org/errata/rfc6238",
        "https://www.rfc-editor.org/errata_search.php?rfc=6238",
        "https://www.rfc-editor.org/rfc/inline-errata/rfc6238.html"
      ],
      "errataUrl$meta": {
        "confidence": "high",
        "note": "Parsed from errata links on RFC/Datatracker pages",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6238/",
        "updated": "2026-10-16T18:57:05.525Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      },
      "latestVersion": true,
      "latestVersion$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6238/",
        "updated": "2026-10-16T18:57:05.525Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      },
      "statusNote": "Informational",
      "statusNote$meta": {
        "confidence": "high",
        "note": "Mapped from Datatracker doc.json std_level",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6238/",
        "updated": "2026-10-16T18:57:05.525Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      },
      "superseded": false,
      "superseded$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6238/",
        "updated": "2026-10-16T18:57:05.525Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      }
    }
  }
}