{
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  "docId": "RFC8891",
  "document": {
    "abstract": "In addition to a new cipher with a block length of n=128 bits (referred to as \"Kuznyechik\" and described in RFC 7801), Russian Federal standard GOST R 34.12-2015 includes an updated version of the block cipher with a block length of n=64 bits and key length of k=256 bits, which is also referred to as \"Magma\". The algorithm is an updated version of an older block cipher with a block length of n=64 bits described in GOST 28147-89 (RFC 5830). This document is intended to be a source of information about the updated version of the 64-bit cipher. It may facilitate the use of the block cipher in Internet applications by providing information for developers and users of the GOST 64-bit cipher with the revised version of the cipher for encryption and decryption.",
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      "confidence": "high",
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      "sourceUrl": "https://www.rfc-editor.org/info/rfc8891/",
      "updated": "2026-10-20T09:42:41.567Z",
      "version": "extractDocs.js@commit:6ff5f1bb34e3"
    },
    "authors": [
      {
        "name": "Vasily Dolmatov"
      },
      {
        "name": "Dmitry Baryshkov"
      }
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      "confidence": "high",
      "note": "Parsed from Datatracker doc page article:author (profile full names)",
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      "source": "parsed",
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      "updated": "2026-10-20T09:42:41.567Z",
      "version": "extractDocs.js@commit:6ff5f1bb34e3"
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      "confidence": "high",
      "note": "Derived from RFC number or Datatracker identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc8891/",
      "updated": "2026-10-20T09:42:41.567Z",
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    "docLabel": "IETF RFC 8891",
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      "confidence": "high",
      "note": "Constructed from provider and document identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc8891/",
      "updated": "2026-10-20T09:42:41.567Z",
      "version": "extractDocs.js@commit:6ff5f1bb34e3"
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    "docNumber": "8891",
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      "confidence": "high",
      "note": "Parsed from RFC info page report metadata",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc8891/",
      "updated": "2026-10-20T16:07:57.010Z",
      "version": "extractDocs.js@commit:cc2368606b5f"
    },
    "docTitle": "GOST R 34.12-2015: Block Cipher \"Magma\"",
    "docTitle$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML title",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc8891/",
      "updated": "2026-10-20T09:42:41.567Z",
      "version": "extractDocs.js@commit:6ff5f1bb34e3"
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    "docType": "Informational",
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      "confidence": "high",
      "note": "Mapped from Datatracker std_level or RFC status text",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc8891/",
      "updated": "2026-10-20T09:42:41.567Z",
      "version": "extractDocs.js@commit:6ff5f1bb34e3"
    },
    "doi": "10.17487/RFC8891",
    "doi$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML doi",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc8891/",
      "updated": "2026-10-20T09:42:41.567Z",
      "version": "extractDocs.js@commit:6ff5f1bb34e3"
    },
    "href": "https://doi.org/10.17487/RFC8891",
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      "confidence": "high",
      "note": "Derived from DOI (https://doi.org/<doi>)",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc8891/",
      "updated": "2026-10-20T09:42:41.567Z",
      "version": "extractDocs.js@commit:6ff5f1bb34e3"
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    "keywords": [
      "Block Cipher"
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    "keywords$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML keywords",
      "originalValue": [
        "Magma",
        "Block Cipher"
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      "overridden": true,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc8891/",
      "updated": "2026-10-20T16:07:57.011Z",
      "version": "extractDocs.js@commit:cc2368606b5f"
    },
    "pages": "13",
    "pages$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML page-count",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc8891/",
      "updated": "2026-10-20T09:42:41.567Z",
      "version": "extractDocs.js@commit:6ff5f1bb34e3"
    },
    "publicationDate": "2020-09-01",
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      "confidence": "high",
      "note": "Parsed from RFC index XML date",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc8891/",
      "updated": "2026-10-20T09:42:41.567Z",
      "version": "extractDocs.js@commit:6ff5f1bb34e3"
    },
    "publisher": "IETF",
    "publisher$meta": {
      "confidence": "high",
      "note": "Static: provider",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc8891/",
      "updated": "2026-10-20T09:42:41.567Z",
      "version": "extractDocs.js@commit:6ff5f1bb34e3"
    },
    "references": {
      "bibliographic": [
        "ISO.10116",
        "ISO.18033-1.2015",
        "ISO.18033-3.2010",
        "RFC7836",
        "orphan/RFC8891/h:829b0f06"
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      "bibliographic$meta": {
        "confidence": "high",
        "note": "Parsed from RFC HTML references/informative sections",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc8891/",
        "updated": "2026-10-20T09:42:41.567Z",
        "version": "extractDocs.js@commit:6ff5f1bb34e3"
      },
      "normative": [
        "RFC5830",
        "RFC7801",
        "orphan/RFC8891/h:c3f67f5f"
      ],
      "normative$meta": {
        "confidence": "high",
        "note": "Parsed from RFC HTML normative references sections",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc8891/",
        "updated": "2026-10-20T09:42:41.567Z",
        "version": "extractDocs.js@commit:6ff5f1bb34e3"
      }
    },
    "resolvedHref": "https://www.rfc-editor.org/info/rfc8891/",
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      "confidence": "high",
      "note": "Final URL resolved via URL redirect verification",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc8891/",
      "updated": "2026-10-20T09:42:41.567Z",
      "version": "extractDocs.js@commit:6ff5f1bb34e3"
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        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc8891/",
        "updated": "2026-10-20T09:42:41.567Z",
        "version": "extractDocs.js@commit:6ff5f1bb34e3"
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      "amends": [
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      "amends$meta": {
        "confidence": "high",
        "note": "Parsed from RFC index XML",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc8891/",
        "updated": "2026-10-20T09:42:41.567Z",
        "version": "extractDocs.js@commit:6ff5f1bb34e3"
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      "errataExist": false,
      "errataExist$meta": {
        "confidence": "high",
        "note": "Derived from presence of errata links on RFC/Datatracker pages",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc8891/",
        "updated": "2026-10-20T09:42:41.567Z",
        "version": "extractDocs.js@commit:6ff5f1bb34e3"
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      "latestVersion": true,
      "latestVersion$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc8891/",
        "updated": "2026-10-20T09:42:41.567Z",
        "version": "extractDocs.js@commit:6ff5f1bb34e3"
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      "statusNote": "Informational",
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        "confidence": "high",
        "note": "Mapped from Datatracker doc.json std_level",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc8891/",
        "updated": "2026-10-20T09:42:41.567Z",
        "version": "extractDocs.js@commit:6ff5f1bb34e3"
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      "superseded": false,
      "superseded$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc8891/",
        "updated": "2026-10-20T09:42:41.567Z",
        "version": "extractDocs.js@commit:6ff5f1bb34e3"
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