CONFERENCE METADATA — incomplete historical coverage; source presence is not proof of delivery.
Research dataset: Lukas Walter, Clemens Sauerwein, Daniel Woods, InfoSec.pptx, https://doi.org/10.5281/zenodo.15989593, CC BY 4.0 https://creativecommons.org/licenses/by/4.0/. Changes: metadata extraction, exact-match reconciliation and uncertainty flags. No endorsement implied.

{
  "id": "defcon-index-18-0bd11a57d51ba424",
  "title": "Decoding reCAPTCHA",
  "presenters": [
    "Chad Houck",
    "Jason Lee"
  ],
  "event": "DEF CON 18",
  "year": "2010",
  "source_url": "https://infocondb.org/con/def-con/def-con-18/decoding-recaptcha",
  "source_kind": "Independent InfoconDB index",
  "source_file": "infocondb-def-con-18.html",
  "rights": "Metadata and source links only; abstracts, biographies, transcripts and media not republished",
  "delivery_status": "Not independently verified",
  "title_status": "source supplied",
  "presenter_status": "Talk-specific credits verified against independent page and official recording metadata",
  "media": [
    {
      "kind": "official video recording",
      "url": "https://www.youtube.com/watch?v=KxBsrm-wkKs",
      "publisher": "DEFCONConference",
      "title": "DEF CON 18 - Chad Houck & Jason Lee - Decoding reCAPTCHA",
      "upload_date": "2013-11-08",
      "event_year": "2010",
      "verification": "Official channel/title/upload metadata checked by research worker through search index; independently linked from InfoconDB talk page; playback not tested",
      "playback_status": "Not tested; direct page retrieval cache-missed for researcher",
      "rights": "External link only; no video or transcript republished"
    }
  ],
  "provenance": [
    {
      "file": "infocondb-def-con-18.html",
      "url": "https://infocondb.org/con/def-con/def-con-18/",
      "source_kind": "secondary independent index",
      "sha256": "69e1e4389fde9d0ed6cddfea557a2786a8c7b8ca2c423b2b822e907d2e905465",
      "checked": "2026-10-16T03:48:51Z"
    },
    {
      "url": "https://infocondb.org/con/def-con/def-con-18/decoding-recaptcha",
      "file": "recaptcha-source.html",
      "sha256": "ba5adf6fbca4489a14abdb4c9b4fec0b7f613706f7e4d19a47282bb049a0d83a",
      "checked": "2026-10-16T05:15:16Z",
      "extraction": "Exact talk-specific presenter links and YouTube href; abstract and biographies omitted"
    },
    {
      "url": "https://www.youtube.com/watch?v=KxBsrm-wkKs",
      "checked": "2026-10-16",
      "verification": "Parent research worker verified DEFCONConference title, credits and upload date; no local video download"
    }
  ],
  "alias_status": "Source credit is Jason Lee. Jay and JayLee aliases not established by these sources; no inferred identity merge.",
  "media_coverage": {
    "video_recording": "linked official recording",
    "slides": "not separately verified",
    "transcript": "not verified",
    "licensed_full_text": "none hosted"
  }
}