4 ms·

I suppose this is a perfectly cromulent use of "security through obscurity", and an excellent example of steganography. I wonder if anyone thought about those

• Someone1234 8y ago
  On a related topic, it would be fun to embed the EURion constellation[0] into random things just so it results in difficult to trace side-effects. For example wear a t-shirt with it printed on, if someone tried to edit CCTV footage or a photo of you, it might error out. [0] https://en.wikipedia.org/wiki/EURion_constellation https://en.wikipedia.org/wiki/EURion_constellation
  • dsl 8y ago
    EURion only works on flat services (photocopiers and scanners). Photoshop detects currency based on a Digimarc watermark, which you can't generate without paying a licensing fee.
    • wolfgke 8y ago
      > Photoshop detects currency based on a Digimarc watermark, which you can't generate without paying a licensing fee. Sounds like a challenge for hackers. :-)
      • userbinator 8y ago
        I'm sure at least one person in the world has reverse-engineered the algorithm, and it might be quite simple, but the legal implications prevent its publication. If anything, it would be more likely to be on the dark web.
    • deleted 8y ago
      [deleted]
    • weinzierl 8y ago
      > Photoshop detects currency based on a Digimarc watermark, which you can't generate without paying a licensing fee. You can't generate your own without paying a licensing fee. Nothing[§] prevents you from extracting existing watermarks and applying them to other things. This is called a copy attack. There are mitigations[1] but I believe they are not practical for banknotes. I've been told by a Digimarc representative in private conversation about the mentioned paper, that "The Digimarc for Images solution does not utilize the exact functionality described in the paper [..]". This was in 2011, I don't know if things have changed. [§] Ok, nothing technical at least; legally it's a different matter... [1] https://www.digimarc.com/docs/default-source/technology-resources/published-technical-papers/commercial-applications/dmrc_image_signatures.pdf https://www.digimarc.com/docs/default-source/technology-reso...
      • dsl 8y ago
        The current research in to the Digimarc currency watermark has determined an absolute minimal test case [1], however no one has discovered the exact watermarking mechanism. I was speaking in absolutes because we can't do a copy attack without knowing what features to extract. Someone has enumerated all the detected regions on the 20 pound note [2] if you'd like to take a stab at it! 1. https://murdoch.is/projects/currency/cropped.png https://murdoch.is/projects/currency/cropped.png 2. https://murdoch.is/projects/currency/small_crops.png https://murdoch.is/projects/currency/small_crops.png
        • ryanlol 8y ago
          I don't know anything about Digimarc, but it looks like this tool may allow you to create watermarks as other people using the official digimarc software https://github.com/flarn2006/DigimarcPIN/ https://github.com/flarn2006/DigimarcPIN/
  • tgsovlerkhgsel 8y ago
    The EURion is only what outdated software uses; there's a new scheme based on invisible digital watermarking.
  • qubex 8y ago
    I first thought of that after I read Gibson’s Spook Country. Never tried it out though.
  • emilfihlman 8y ago
    This is super dystopian.
    • dymk 8y ago
      Uh, how so?
  • lozf 8y ago
    I saw these a while ago: https://www.zazzle.com/eurion_constellation_t_shirt-235509764478000766 https://www.zazzle.com/eurion_constellation_t_shirt-23550976...
• deleted 8y ago
  [deleted]
• jjulius 8y ago
  >... cromulent... This really embiggened my morning.