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I just developed and published a script to clear your pict-rs object storage from potential CSAM. (github.com)
submitted 1 year ago* (last edited 1 year ago) by db0@lemmy.dbzer0.com to c/selfhosted@lemmy.world
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I noticed a bit of panic around here lately and as I have had to continuously fight against pedos for the past year, I have developed tools to help me detect and prevent this content.

As luck would have it, we recently published one of our anti-csam checker tool as a python library that anyone can use. So I thought I could use this to help lemmy admins feel a bit more safe.

The tool can either go through all your images via your object storage and delete all CSAM, or it canrun continuously and scan and delete all new images as well. Suggested option is to run it using --all once, and then run it as a daemon and leave it running.

Better options would be to be able to retrieve exact images uploaded via lemmy/pict-rs api but we're not there quite yet.

Let me know if you have any issue or improvements.

EDIT: Just to clarify, you should run this on your desktop PC with a GPU, not on your lemmy server!

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[-] veroxii@aussie.zone 76 points 1 year ago

This is extremely cool.

Because of the federated nature of Lemmy many instances might be scanning the same images. I wonder if there might be some way to pool resources that if one instance has already scanned an image some hash of it can be used to identify it and the whole AI model doesn't need to be rerun.

Still the issue of how do you trust the cache but maybe there's some way for a trusted entity to maintain this list?

[-] irdc@derp.foo 18 points 1 year ago* (last edited 1 year ago)

How about a federated system for sharing “known safe” image attestations? That way, the trust list is something managed locally by each participating instance.

Edit: thinking about it some more, a federated image classification system would allow some instances to be more strict than others.

[-] gabe@literature.cafe 28 points 1 year ago

I think building such a system of some kind that can allow smaller instances to rely from help from larger instances would be extremely awesome.

Like, lemmy has the potential to lead the fediverse is safety tools if we put the work in.

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this post was submitted on 28 Aug 2023
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