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Hash-matching and CSAM detection

The use of hash-matching and automated detection tools to identify and filter out known child sexual abuse material (CSAM) and prioritize novel or first-generation content for investigators.

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Feb 3, 2026

How do hash-matching and automated tools used by NCMEC affect false positives and case prioritization?

Hash-matching and automated detection tools dramatically reduce the workload of human reviewers by filtering known child sexual abuse material (CSAM) and surfacing likely novel or first-generation con...