Decoder. plain-English AI glossary

CSAM detection

● Core

Also called Child Sexual Abuse Material detection

The always-on scan that catches child sexual abuse material and stops it cold, no exceptions.

Think of it like

A metal detector at the door that everyone walks through — not because everyone is a threat, but because the one case that gets past is catastrophic.

Example

An image generator refuses a prompt and files a report because the request tripped a child-safety classifier long before any pixels were drawn.

How it actually works

Detection leans on hash-matching against known illegal material (like PhotoDNA) plus classifiers that flag likely-new content. It runs on inputs and outputs, and confirmed hits are legally reportable, not just blocked. It is the one area where providers accept high false-positive pain to avoid ever missing a true positive.

For product teams

This is non-negotiable table stakes — a single failure here is an existential, headline-level event, not a metric to optimize.

For engineers

Combine perceptual-hash matching on known material with trained classifiers for novel content, wired into both prompt intake and generation output with mandatory reporting hooks.

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