I don't even think they own all of them? There are a billionty porn site aggregators that pull from Pornhub and get ranked on Google, Bing, and other search engines.
Is removing _all_ traces of this video even a tractable problem?
Is removing _all_ traces of this video even a tractable problem?
A court can order videos or thumbnails matching the hash to be removed, and levy penalties against anyone still hosting them after a period of time.
It’s a less complex problem than policing use of copyrighted music on YouTube videos, and that has been achieved.
Sites would be motivated to check it regularly to avoid being out of compliance.
the internet definitely remembers forever, unfortunately, especially porn
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.