Quoting: Pikolo

Quoting: LoudTechieMy proposals were.
Publish cryptographic hashes of restricted material, so small player can collaborate to implement filters for illegal information like CSAM and copyright protected material allowing them to more cheaply preform moderation responsibilities.

Perceptual hashing [External Link], used for copyrighted content and CSAM detection is very different from cryptographic hashing. The goal is to catch images and videos that are "sufficiently similar". It's as vague as it sounds, and unless configured with a very low sensitivity is guaranteed to cause false positives. When configured with low sensitivity, it's possible to bypass. When you take into account the quantity of CSAM perceptual hashes out there, false positives happen regularly. So you can either block everything, or block random things. Far from a solved problem

Using perceptual hashing for copyright enforcement is even worse, because the algorithm has no way to account for exceptions to copyright [External Link]. That should always be a human's judgement call, but with copyright trolls in the picture you get a lot of pressure towards false positives.

I know this.
I asked for cryptographic hashes, because it's better than nothing and can be used as a start to build a functioning system.
Cryptographic hashes can be freely published, since they're cryptographic hashes meaning that they're sufficiently resistant to collision, decompression and other attacks.
Many parties can't get access to the perceptual hashes normally used to enforce laws, yet still want to host lawabiding servers.
A list of cryptographic hashes could be used for the following:
- public accountability of what's being removed by government mandate(throw your sensitive publications in a hashing algorithm and find out if you're being censored)
- A self hosted file server/forum/other user content providing service, which can build perceptual hashes from the lazily posted illegal content it catches on its own server(only one criminal has to be too lazy to edit a file and all instances already on the server can be caught, repeat offenders can be used as data mines for more cryptographic and perceptual hashes, trust of law enforcement can be won by reporting).
These servers would never publish the perceptual hashes they generate, just provide back cryptographic hashes to the project that enables them to automate large part of their moderation, which can use this to enable more to catch and share.

Edit:
Also cryptographic hashes are accurate, which means they won't be dealing with too much false positives and can carefully expand their coverage avoiding many of the mistakes big tech made along the way.

Beside that European copyright exception are only slightly comparable to US copyright exceptions.
They might have the opportunity to fine tune on the way.

Law based moderation software packages tend to be expensive riddled with NDA's, big tech dependencies and absolutely critical for anyone trying to solve the EU's hosting power problem.
This could be a start to a more open, accountable and sovereign European internet.