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Index/Topics/Hashing Algorithms

Hashing Algorithms

The use of cryptographic hashes, perceptual hashing, and video frame hashing to detect CSAM.

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Jan 27, 2026

How do ISPs use hashing and file fingerprinting to detect CSAM content in transit?

Internet service providers (ISPs and platform hosts detect known child sexual abuse material () in transit primarily by converting files into hashes—digital fingerprints—and matching those hashes agai...

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