Observed arrival · 2026-08-22
How Do You Find an Illegal Image Without Looking at It?
Mahmoud Salem’s essay explains how perceptual hashing, machine learning, and video fingerprinting help detect child-abuse material without exposing people to the imagery.
Why it surfaced
A 32-minute technical essay tackles an enormous and difficult safety problem through a carefully chosen constraint: machines must identify the material while humans never see it. The page also plainly discloses its unusual authorship model: conceived and directed by a human, written by AI.
Mahmoud Salem’s essay explains how perceptual hashing, machine learning, and video fingerprinting help detect child-abuse material without exposing people to the imagery.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
One card from the complete issue