this post was submitted on 28 Aug 2023
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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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[–] hoodlem@hoodlem.me 15 points 1 year ago (2 children)

Ugh, what a mess. Thought about this for a while today and three thoughts started circulating in my head:

  1. Hire an actual lawyer and get firm legal advice on this issue. I think this would fall to the admins, not the devs. Maybe an admin who wanted could volunteer to contact a lawyer? We could do a gofundme for one-time consultation legal fees.

  2. Stop using pictrs completely and instead use links to a third party such as Imgur or whatever. They’re in this business and I’m sure already have dealt with it and have a solution. Yes it sucks that Imgur (or whatever third party) could delete our legitimate images at any time, but IMHO it’s worth it to avoid this headache. At any rate it offloads the liability from an admin. Of course, IANAL and this is a question we would want to ask a lawyer about.

  3. Needing a GPU increases the expenses for an admin significantly. It will start to not be worth it for quite a few to keep their instance running.

Thanks for bringing up this point. This is obviously a nuanced issue that is going to need a well-thought-out solution.

[–] sloppy_diffuser@sh.itjust.works 2 points 1 year ago

Depending on the country, those laws may be different. Here is a story of a guy who ran a TOR exit node in Australia who would have been protected as a company (law was later changed).

https://lowendbox.com/blog/man-found-guilty-of-child-porn-because-he-ran-a-tor-exit-node-the-story-of-william-weber/

[–] db0@lemmy.dbzer0.com 1 points 1 year ago

The GPU doesn't have to be high-end, and can run on someone's PC