this post was submitted on 10 Nov 2024
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[–] Kalcifer@sh.itjust.works 12 points 5 days ago (19 children)

Run the software that scans images for CSAM.

Which software is that?

[–] walden@sub.wetshaving.social 14 points 5 days ago (18 children)

It's called Lemmy-Safety of Fedi-Safety depending on where you look.

One thing to note, I wasn't able to get it running on a VPS because it requires some sort of GPU.

[–] Kalcifer@sh.itjust.works 10 points 5 days ago (16 children)

One thing to note, I wasn’t able to get it running on a VPS because it requires some sort of GPU.

This is good to know. I know that you can get a VPS with a GPU, but they're usually rather pricey. I wonder if there's one where the GPU's are shared, and you only get billed by how much the GPU is used. So if there is an image upload, the GPU would kick on to check it, you get billed for that GPU time, then it turns off and waits for the next image upload.

[–] pe1uca@lemmy.pe1uca.dev 5 points 5 days ago (2 children)

I don't think there are services like that, since usually this means deploying and destructing an instance, which takes a few minutes (if you just turn off the instance you still get billed).
Probably the best option would be to have a snapshot, which costs way less than the actual instance, and create from it each day or so yo run on the images since it was last destroyed.

This is kind of what I do with my media collection, I process it on my main machine with a GPU, and then just serve it from a low-power one with Jellyfin.

[–] Kalcifer@sh.itjust.works 2 points 4 days ago* (last edited 4 days ago) (1 children)

create from it each day or so yo run on the images since it was last destroyed.

Unfortunately, for this usecase, the GPU needs to be accessible in real time; there is a 10 second window when an image is posted for it to be processed [1].

References

  1. "I just developed and deployed the first real-time protection for lemmy against CSAM!". @db0@lemmy.dbzer0.com. !div0@lemmy.dbzer0.com. Divisions by zero. Published: 2023-09-20T08:38:09Z. Accessed: 2024-11-12T01:28Z. https://lemmy.dbzer0.com/post/4500908.
    • §"For lemmy admins:"

      [...]

      • fedi-safety must run on a system with GPU. The reason for this is that lemmy provides just a 10-seconds grace period for each upload before it times out the upload regardless of the results. [1]

      [...]

[–] db0@lemmy.dbzer0.com 3 points 4 days ago* (last edited 4 days ago) (1 children)

You can actually run it in async model without pictrs safety and just have it scan your newly uploaded images directly from storage. It just doesn't prevent upload this way, just deletes them.

[–] Kalcifer@sh.itjust.works 1 points 1 day ago (1 children)

You're referring to using only fedi-safety instead of pictrs-safety, as was mentioned in §"For other fediverse software admins", here, right?

[–] Kalcifer@sh.itjust.works 1 points 4 days ago

Probably the best option would be to have a snapshot

Could you point me towards some documentation so that I can look into exactly what you mean by this? I'm not sure I understand the exact procedure that you are describing.

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