Decoding reCAPTCHA
DEF CON 18 · 2010
Presenter: Chad Houck · Jason Lee
Attributed source ↗ · Plaintext record
Independent InfoconDB index. Title: source supplied. Credit: talk-specific credits verified. Delivery: Not independently verified.
Rights: Metadata and source links only; abstracts, biographies, transcripts and media not republished
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.
Watch the talk
Official DEFCONConference recording: Chad Houck & Jason Lee — Decoding reCAPTCHA
Event: DEF CON 18, 2010. Video upload: 8 November 2013. Upload date is not the talk date. Playback has not been tested. Standalone slides and transcript are not verified; no full text is hosted.
Credits checked against the talk-specific independent index and official recording metadata. Historical source credit: Jason Lee. No unverified alias is added.
Inspect structured metadata and provenance
{
"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"
}
}