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Restricted reference database distributing matching signals across participating platforms
The GIFCT Hash-Sharing Database is a shared collection of content fingerprints and associated labels used to help participating services identify qualifying terrorist and violent extremist material. Members contribute signals, and GIFCT can also create hashes. Access and inclusion are governed separately from a platform's own enforcement decisions.
The published taxonomy describes separate designation, qualifying-incident and behavioural routes. TCAP-sourced inputs must also satisfy GIFCT's parameters rather than entering automatically. GIFCT's transparency accounts report label corrections, hash removals and a nonviolent music-video removal. A contributor withdrawal becomes visible to another member at its next access, but that does not demonstrate the recipient processed it or revisited an earlier action. The correction examples are not a random database sample and cannot yield a database-wide error rate.
GIFCT HSDB taxonomy — December 2022 v1.0 → GIFCT Hash-Sharing Database
UN list, qualifying incident and behavioral routes have separate predicates. Behavioral classification needs more than an ideological label. December 2022 terminology remains dated.
GIFCT Hash-Sharing Database → GIFCT member technology companies
Cryptographic/perceptual signals assist identification. GIFCT says it does not dictate enforcement; actual provider configuration, review and outcome need separate records.
GIFCT member technology companies → GIFCT Hash-Sharing Database
Member-supplied signals and feedback are documented; GIFCT also can create hashes. Admission under taxonomy is distinct from a platform moderation verdict.
GIFCT Hash-Sharing Database → Altitude — inspected public implementation
2024-08-08 – 2024-08-08
README requires obtaining GIFCT credentials. No exact GIFCT adapter payload or actual deployment was inspected; do not inherit TCAP payload semantics.
Terrorist Content Analytics Platform → GIFCT Hash-Sharing Database
Taxonomy names TCAP but requires GIFCT inclusion parameters too. This filter defeats an inference that every TCAP label automatically enters HSDB.
Global Internet Forum to Counter Terrorism → GIFCT Hash-Sharing Database
Annual report describes GIFCT hash creation as well as member contributions; no item-specific instance asserted.
GIFCT member technology companies → GIFCT Hash-Sharing Database
Dated 2022/2025 report accounts, not a verified universal correction service-level agreement.
2022 account describes review/sample corrections and a separate nonviolent music-video removal. Another member sees contributor withdrawal at its next access. Nonrandom feedback does not establish a database-wide error rate; no recipient processing or restoration proved.
Global Internet Forum to Counter Terrorism → GIFCT Hash-Sharing Database
2022 report period; individual withdrawal dates unspecified.
2022 report says GIFCT took full management and rescinded access from five legacy nonmembers that did not pursue membership. Historical organizational access change, not current membership count or content removal.
GIFCT: organizational authority, financing and signal correction ↗
Global Internet Forum to Counter Terrorism → reported taking management and withdrawing five legacy accesses → GIFCT Hash-Sharing Database
2022 report period; individual withdrawal dates unspecified.
Reported by the cited source
2022 report says GIFCT took full management and rescinded access from five legacy nonmembers that did not pursue membership. Historical organizational access change, not current membership count or content removal.
GIFCT member technology companies → contribute qualified hashes and labels → GIFCT Hash-Sharing Database
Member-supplied signals and feedback are documented; GIFCT also can create hashes. Admission under taxonomy is distinct from a platform moderation verdict.
Global Internet Forum to Counter Terrorism → can create qualifying hashes itself → GIFCT Hash-Sharing Database
Annual report describes GIFCT hash creation as well as member contributions; no item-specific instance asserted.
GIFCT HSDB taxonomy — December 2022 v1.0 → defines qualified inclusion routes → GIFCT Hash-Sharing Database
UN list, qualifying incident and behavioral routes have separate predicates. Behavioral classification needs more than an ideological label. December 2022 terminology remains dated.
Terrorist Content Analytics Platform → supplies URL-hash inputs subject to GIFCT’s own parameters → GIFCT Hash-Sharing Database
Taxonomy names TCAP but requires GIFCT inclusion parameters too. This filter defeats an inference that every TCAP label automatically enters HSDB.
GIFCT Hash-Sharing Database → supplies matching information while platforms retain decisions → GIFCT member technology companies
Cryptographic/perceptual signals assist identification. GIFCT says it does not dictate enforcement; actual provider configuration, review and outcome need separate records.
GIFCT member technology companies → reported correcting labels and removing hashes → GIFCT Hash-Sharing Database
Dated 2022/2025 report accounts, not a verified universal correction service-level agreement.
Reported by the cited source
2022 account describes review/sample corrections and a separate nonviolent music-video removal. Another member sees contributor withdrawal at its next access. Nonrandom feedback does not establish a database-wide error rate; no recipient processing or restoration proved.
GIFCT Hash-Sharing Database → is a separately credentialed source described by Altitude → Altitude — inspected public implementation
2024-08-08 – 2024-08-08
README requires obtaining GIFCT credentials. No exact GIFCT adapter payload or actual deployment was inspected; do not inherit TCAP payload semantics.