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Index/Topics/Hash-Based Defenses

Hash-Based Defenses

The use of hash-based defenses in detecting and preventing the spread of child sexual abuse material, and the limitations of such defenses.

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Jan 27, 2026

How do AI classifiers distinguish between sexualized but legal imagery and CSAM, and what are their error rates?

AI systems separate sexualized-but-legal imagery from child sexual abuse material () by combining content classifiers that detect sexual content with age-estimation modules, hash-matching of known ill...