{
  "$schema": "/api/schemas/documents.schema.json",
  "apiVersion": "1.1.0",
  "lastModified": "2026-10-14T15:57:23.026Z",
  "sourcePath": "src/main/data/docs",
  "docId": "RFC6528",
  "document": {
    "abstract": "This document specifies an algorithm for the generation of TCP Initial Sequence Numbers (ISNs), such that the chances of an off-path attacker guessing the sequence numbers in use by a target connection are reduced. This document revises (and formally obsoletes) RFC 1948, and takes the ISN generation algorithm originally proposed in that document to Standards Track, formally updating RFC 793. [STANDARDS-TRACK]",
    "abstract$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML abstract",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6528/",
      "updated": "2026-10-13T22:26:02.184Z",
      "version": "extractDocs.js@commit:fd871efde64d"
    },
    "authors": [
      {
        "name": "Fernando Gont"
      },
      {
        "name": "Steven Bellovin"
      }
    ],
    "authors$meta": {
      "confidence": "high",
      "note": "Parsed from Datatracker doc page article:author (profile full names)",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6528/",
      "updated": "2026-10-13T22:26:02.184Z",
      "version": "extractDocs.js@commit:fd871efde64d"
    },
    "docId": "RFC6528",
    "docId$meta": {
      "confidence": "high",
      "note": "Derived from RFC number or Datatracker identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6528/",
      "updated": "2026-10-13T22:26:02.184Z",
      "version": "extractDocs.js@commit:fd871efde64d"
    },
    "docLabel": "IETF RFC 6528",
    "docLabel$meta": {
      "confidence": "high",
      "note": "Constructed from provider and document identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6528/",
      "updated": "2026-10-13T22:26:02.184Z",
      "version": "extractDocs.js@commit:fd871efde64d"
    },
    "docNumber": "6528",
    "docNumber$meta": {
      "confidence": "high",
      "note": "Parsed from RFC info page report metadata",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6528/",
      "updated": "2026-10-13T22:26:02.184Z",
      "version": "extractDocs.js@commit:fd871efde64d"
    },
    "docTitle": "Defending against Sequence Number Attacks",
    "docTitle$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML title",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6528/",
      "updated": "2026-10-13T22:26:02.184Z",
      "version": "extractDocs.js@commit:fd871efde64d"
    },
    "docType": "Standard",
    "docType$meta": {
      "confidence": "high",
      "note": "Mapped from Datatracker std_level or RFC status text",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6528/",
      "updated": "2026-10-13T22:26:02.184Z",
      "version": "extractDocs.js@commit:fd871efde64d"
    },
    "doi": "10.17487/RFC6528",
    "doi$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML doi",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6528/",
      "updated": "2026-10-13T22:26:02.184Z",
      "version": "extractDocs.js@commit:fd871efde64d"
    },
    "href": "https://doi.org/10.17487/RFC6528",
    "href$meta": {
      "confidence": "high",
      "note": "Derived from DOI (https://doi.org/<doi>)",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6528/",
      "updated": "2026-10-13T22:26:02.184Z",
      "version": "extractDocs.js@commit:fd871efde64d"
    },
    "keywords": [
      "TCP Security"
    ],
    "keywords$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML keywords",
      "originalValue": [
        "TCP Security",
        "TCP Sequence Numbers",
        "Sequence Number Randomization",
        "Obfuscation",
        "TCP Vulnerabilities"
      ],
      "overridden": true,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6528/",
      "updated": "2026-10-14T15:57:23.026Z",
      "version": "extractDocs.js@commit:ca62cd19765f"
    },
    "pages": "12",
    "pages$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML page-count",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6528/",
      "updated": "2026-10-13T22:26:02.184Z",
      "version": "extractDocs.js@commit:fd871efde64d"
    },
    "publicationDate": "2012-02-01",
    "publicationDate$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML date",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6528/",
      "updated": "2026-10-13T22:26:02.184Z",
      "version": "extractDocs.js@commit:fd871efde64d"
    },
    "publisher": "IETF",
    "publisher$meta": {
      "confidence": "high",
      "note": "Static: provider",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6528/",
      "updated": "2026-10-13T22:26:02.184Z",
      "version": "extractDocs.js@commit:fd871efde64d"
    },
    "references": {
      "bibliographic": [
        "RFC854",
        "RFC1034",
        "RFC1948",
        "RFC3022",
        "RFC4120",
        "RFC4251",
        "RFC4301",
        "RFC4954",
        "RFC5321",
        "RFC5925",
        "RFC5936",
        "RFC6151",
        "orphan/RFC6528/h:0402b1e0",
        "orphan/RFC6528/h:9a359081",
        "orphan/RFC6528/h:982aa1fe",
        "orphan/RFC6528/h:9008d726",
        "orphan/RFC6528/h:c2314e94",
        "orphan/RFC6528/h:2299c112",
        "orphan/RFC6528/h:9f9275f8",
        "orphan/RFC6528/h:c3e7b161",
        "orphan/RFC6528/h:83963b0a",
        "orphan/RFC6528/h:5989776a",
        "orphan/RFC6528/h:ff0c6f75",
        "orphan/RFC6528/h:f85ea47e"
      ],
      "bibliographic$meta": {
        "confidence": "medium",
        "flag": "MIXED_REF_LAYOUT_RISK anchored=31 proseBlocks=36 skippedAnchorBlocks=34",
        "note": "Parsed from RFC HTML references/informative sections",
        "originalValue": [],
        "reviewRequired": true,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6528/",
        "updated": "2026-10-13T22:26:02.184Z",
        "version": "extractDocs.js@commit:fd871efde64d"
      },
      "normative": [
        "RFC793",
        "RFC1321",
        "RFC1323",
        "RFC2119",
        "RFC4086",
        "RFC6056"
      ],
      "normative$meta": {
        "confidence": "high",
        "note": "Parsed from RFC HTML normative references sections",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6528/",
        "updated": "2026-10-13T22:26:02.184Z",
        "version": "extractDocs.js@commit:fd871efde64d"
      }
    },
    "resolvedHref": "https://www.rfc-editor.org/info/rfc6528/",
    "resolvedHref$meta": {
      "confidence": "high",
      "note": "Final URL resolved via URL redirect verification",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6528/",
      "updated": "2026-10-13T22:26:02.184Z",
      "version": "extractDocs.js@commit:fd871efde64d"
    },
    "status": {
      "active": false,
      "active$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6528/",
        "updated": "2026-10-13T22:26:02.184Z",
        "version": "extractDocs.js@commit:fd871efde64d"
      },
      "amends": [
        "RFC793"
      ],
      "amends$meta": {
        "confidence": "high",
        "note": "Parsed from RFC index XML",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6528/",
        "updated": "2026-10-13T22:26:02.184Z",
        "version": "extractDocs.js@commit:fd871efde64d"
      },
      "errataExist": false,
      "errataExist$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/rfc6528/",
        "updated": "2026-10-13T22:26:02.184Z",
        "version": "extractDocs.js@commit:fd871efde64d"
      },
      "latestVersion": false,
      "latestVersion$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6528/",
        "updated": "2026-10-13T22:26:02.184Z",
        "version": "extractDocs.js@commit:fd871efde64d"
      },
      "statusNote": "Proposed Standard",
      "statusNote$meta": {
        "confidence": "high",
        "note": "Mapped from Datatracker doc.json std_level",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6528/",
        "updated": "2026-10-13T22:26:02.184Z",
        "version": "extractDocs.js@commit:fd871efde64d"
      },
      "superseded": true,
      "superseded$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6528/",
        "updated": "2026-10-13T22:26:02.184Z",
        "version": "extractDocs.js@commit:fd871efde64d"
      },
      "supersededBy": [
        "RFC9293"
      ],
      "supersededBy$meta": {
        "confidence": "high",
        "note": "Parsed from RFC index XML",
        "originalValue": [],
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6528/",
        "updated": "2026-10-13T22:26:02.184Z",
        "version": "extractDocs.js@commit:fd871efde64d"
      },
      "supersedes": [
        "RFC1948"
      ],
      "supersedes$meta": {
        "confidence": "high",
        "note": "Parsed from RFC index XML",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6528/",
        "updated": "2026-10-13T22:26:02.184Z",
        "version": "extractDocs.js@commit:fd871efde64d"
      }
    }
  }
}