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They are not using cryptographic hashes. They are using perceptual hashes[1] which are fairly trivial to replicate. [1]: https://en.wikipedia.org/wiki/Perceptu
by kickopotomus 5y ago
They are not using cryptographic hashes. They are using perceptual hashes[1] which are fairly trivial to replicate.
[1]: https://en.wikipedia.org/wiki/Perceptual_hashing https://en.wikipedia.org/wiki/Perceptual_hashing
- tcoff91 5y agoThis seems dumb. I'm sure that sophisticated bad people will just alter colors and things to defeat the hashes and meanwhile trolls will generate collisions to cause people to falsely be flagged.
- judge2020 5y agoThe perceptual hashes are specifically designed to correlate images that are visually similar while not being exactly alike, even when the colors are altered. See: https://blog.cloudflare.com/the-csam-scanning-tool/ https://blog.cloudflare.com/the-csam-scanning-tool/
- deleted 5y ago[deleted]