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A FOSS tool used for .pdf files cleaning from potential malware, which also can delete metadata, is DangerZone. Probably overkill for simple metadata cleaning,
by squarefoot 2y ago
A FOSS tool used for .pdf files cleaning from potential malware, which also can delete metadata, is DangerZone. Probably overkill for simple metadata cleaning, but worth mentioning nonetheless.
https://dangerzone.rocks/ https://dangerzone.rocks/
- jojobas 2y agoIt can be not just metadata. There are plenty of ways to hide 128 bits of ID in a long enough pdf. White rectangles on white background, slightly non-black coloured pixels here and there, you name it. Many can even survive a print-and-scan.
- squarefoot 2y agoIn theory turning everything into an image then compressing using lossy formats aiming at very low size should mask subtle visual artifacts, but yeah, steganography could be implemented in many other ways, such as slightly different fonts (sizes, line spacing, orientation, etc). I wonder if AI, could be used to analyze and find those details by comparing potentially watermarked identical documents.
- rsanek 2y agothis tool is mentioned in the second post of the linked thread.
- squarefoot 2y agoMissed it at first. Whoops...