Comment by david_shaw

From the tool description linked:

> Dangerzone works like this: You give it a document that you don't know if you can trust (for example, an email attachment). Inside of a sandbox, Dangerzone converts the document to a PDF (if it isn't already one), and then converts the PDF into raw pixel data: a huge list of RGB color values for each page. Then, outside of the sandbox, Dangerzone takes this pixel data and converts it back into a PDF.

With this in mind, Dangerzone wouldn't even remove conventional watermarks (that inlay small amounts of text on the image).

I think the "freedomofpress" GitHub repo primed you to think about protecting someone leaking to journalists, but really it's designed to keep journalists (and other security-minded folk) safe from untrusted attachments.

The official website -- https://dangerzone.rocks/ -- is a lot more clear about exactly what the tool does. It removes malware, removes network requests, supports various filetypes, and is open source.

Their about page ( https://dangerzone.rocks/about/ ) shows common use cases for journalists and others.