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by zepto 1903 days ago
The hashes would be stored somewhere central.

Sites would be motivated to check it regularly to avoid being out of compliance.
1 comments
pgsimp 1901 days ago
That assumes all thumbnails or pictures hash to the same value. Why would that be? There can be different algorithms, resolutions, crops... And there can be millions of thumbnails to check.
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zepto 1900 days ago
> That assumes all thumbnails or pictures hash to the same value.

The same set of values, yes.

> Why would that be? There can be different algorithms, resolutions, crops...

Yes, so you do normalization and reduction before computing the hashes.

And ‘hashes’ doesn’t have to mean literal SHA. Any non-reversible fingerprinting algorithm will do.

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nunez 1901 days ago
Yeah it's a gnarly problem for sure. I mean I'm sure doing some sort of hash-based blocking would knock out 80% of the content related to a takedown request, but I could also see that last 20% being difficult af to purge.

the internet definitely remembers forever, unfortunately, especially porn

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