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": "ccc-import-884b43d141f3f1d521",
  "title": "Tor and censorship: lessons learned",
  "presenters": [
    "Roger Dingledine"
  ],
  "event": "26C3: Here be Dragons",
  "year": "2009",
  "source_url": "https://media.ccc.de/v/26c3-3554-de-tor_and_censorship_lessons_learned",
  "source_kind": "CCC recording catalog",
  "source_file": "ccc-26c3.json",
  "rights": "Metadata and source links only; abstracts, biographies, transcripts and media not republished",
  "delivery_status": "Not independently verified",
  "title_status": "source supplied",
  "presenter_status": "source supplied",
  "media": [
    {
      "kind": "recording page",
      "url": "https://media.ccc.de/v/26c3-3554-de-tor_and_censorship_lessons_learned"
    }
  ],
  "provenance": [
    {
      "event": "26c3",
      "title": "26C3: Here be Dragons",
      "source": "https://api.media.ccc.de/public/conferences/26c3",
      "file": "ccc-26c3.json",
      "sha256": "c2c9a4db91909ef26f1f7a6245e50a62bb632f032f3a93adcb566f674bef19bc",
      "checked": "2026-10-16T03:44:25Z",
      "source_records": 86
    }
  ],
  "source_guid": "import-884b43d141f3f1d521",
  "source_event_api": "https://api.media.ccc.de/public/events/import-884b43d141f3f1d521",
  "date": "2009-12-27T01:00:00.000+01:00",
  "duration_seconds": 3832,
  "language": "eng",
  "tags": [
    "26c3",
    "Society"
  ],
  "event_acronym": "26c3",
  "source_schedule_url": null
}