EDIT: Obfuscate doesn’t remove EXIF tags btw, so make sure to also remove remove them after redacting by using Metadata Cleaner or Exiftool/MAT2 CLI if you prefer.
Are we reading the same article? From the article:
As you can see, the Blur method doesn’t really hide the contents all that well, and people with the correct tools can recover the text. So, don’t use that redaction mode for highly sensitive stuff.
I’ve tested this tool after I moved to Fedora Silverblue recently. I was looking for a basic image editor that can be used for redaction functionality which isn’t Gwenview (since the Flatpak looks horrible on GNOME).
I appreciate the tool’s simplicity, and as discussed in the OP, the clear warning it shows about the limitations of the blur feature.
Notably, in contrast to Gwenview—which asks forfilesystem=host and PulseAudio permissions—Obfuscate doesn’t ask for any sensitive permissions other than IPC + X11, which can be disabled without affecting the functionality of the app.
GNOME’S PDF viewer (Evince) doesn’t have redaction capabilities (it doesn’t support opening popular image formats anyway).
The default image viewer (Loupe) also doesn’t have redaction capabilities, sadly.