Prompted by @kenwhite.bsky.social asking a question about how to un-watermark images, and not finding a good introductory post in a few minutes of searching, I wrote up a thing!
https://makenorth.ca/blog/anonymizing-documents/
This is intended to be a short and non-exhaustive introduction to watermarking, fingerprinting, and basic methods to mitigate those tactics. This is not a comprehensive guide and you should not take (just) my word on this, especially if you're worried about very well-resourced actors.
If anyone has additional links, thoughts, etc., feel free to send me a pull request over on GitHub:
https://github.com/MakeNorth/makenorth.github.io/blob/main/content/blog/anonymizing-documents.md
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