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-dN7QONPJousa5xBD6XQxgg",
  "title": "DP5: PIR for Privacy-preserving Presence",
  "presenters": [
    "Ian Goldberg",
    "George Danezis",
    "Nikita Borisov"
  ],
  "event": "31C3: a new dawn",
  "year": "2014",
  "source_url": "https://media.ccc.de/v/31c3_-_6140_-_en_-_saal_1_-_201412291715_-_dp5_pir_for_privacy-preserving_presence_-_ian_goldberg_-_george_danezis_-_nikita_borisov",
  "source_kind": "CCC recording catalog",
  "source_file": "ccc-31c3.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/31c3_-_6140_-_en_-_saal_1_-_201412291715_-_dp5_pir_for_privacy-preserving_presence_-_ian_goldberg_-_george_danezis_-_nikita_borisov"
    }
  ],
  "provenance": [
    {
      "event": "31c3",
      "title": "31C3: a new dawn",
      "source": "https://api.media.ccc.de/public/conferences/31c3",
      "file": "ccc-31c3.json",
      "sha256": "6c4ecd0a44420645e340cdae2185a2a000b4a8d9aab51348a48d85f58e03107c",
      "checked": "2026-10-16T03:44:46Z",
      "source_records": 136
    }
  ],
  "source_guid": "dN7QONPJousa5xBD6XQxgg",
  "source_event_api": "https://media.ccc.de/public/events/dN7QONPJousa5xBD6XQxgg",
  "date": "2014-12-29T17:15:00.000+01:00",
  "duration_seconds": 3591,
  "language": "eng",
  "tags": [
    "Security & Hacking"
  ],
  "event_acronym": "31c3",
  "source_schedule_url": "http://events.ccc.de/congress/2014/Fahrplan/schedule.xml"
}