I know Calibre can remove DRM, but it seems that Calibre does not remove things like watermarks, references to the buyer by name, etc. Now maybe I can try to find those manually, but that is an error prone process. Plus, what if they embed a unique digital signature that ties back to me? I understand that this is a very uncommon practice, but I do not want to find myself in a bad place.

I suppose the only way to remove a digital signature of any sort is to buy two of the same e-book by different people, diff them, and remove anything that differentiates them.

Is there any tool that does this or automates the process? am I being too paranoid, and this is not a real threat?

      • FierySpectre@lemmy.world
        link
        fedilink
        English
        arrow-up
        8
        ·
        8 months ago

        There are so many ways to encode information into an image without changing its look that I doubt you’ll find most of them by “changing levels”

        • conciselyverbose@sh.itjust.works
          link
          fedilink
          English
          arrow-up
          3
          ·
          8 months ago

          I’d personally be a lot more likely to blur and add random noise, then use lossy compression if I wanted to mitigate steganography, but even then, they don’t need to encode a lot of information and they have a base image and secrets to compare to. It’s entirely possible for them to have chosen something reasonably robust through random edits like that.

    • Lemongrab@lemmy.one
      link
      fedilink
      English
      arrow-up
      3
      arrow-down
      1
      ·
      8 months ago

      Theoretically, yes. Handling of images programmatically could allow for some simple lossy compression which would help.