5 ms·

Visual Cryptography Kit

• hackcasual 9y ago
  Result: http://imgur.com/DpcqpMs http://imgur.com/DpcqpMs
  • Luc 9y ago
    I printed the images onto A4 paper (held in front of a lamp). It's quite fiddly to get them to match. Very fine sub-mm accuracy needed.
    • grenoire 9y ago
      Not only that, but both sources must be printed at the same aspect ratio and DPI.
    • moondev 9y ago
      just drag the image on top of the other with your mouse
      • Luc 9y ago
        The point is that it's much harder with a hardcopy...
• deleted 9y ago
  [deleted]
• devdoomari 9y ago
  isn't this somewhat easy-to-decrypt than OTP? this isn't using some XORs, but 'OR' operations.
• i336_ 9y ago
  data:text/html, <style>img { opacity: 0.5; position: fixed; left: 0; top: 0 }</style> <body><img src="https://www.cl.cam.ac.uk/~fms27/vck/share1.gif"> <img src="https://www.cl.cam.ac.uk/~fms27/vck/share2.gif"> Of course, I did this via the domtools^Wdevtools before experimentally trying the above, which happily works as well. I think the reason the images loaded was because I was on a data: URI? Or am I misinterpreting CORS?