Quote from: o_e_l_e_o on April 18, 2022, 07:13:58 PM

Not using this method. It doesn't matter how good quality your prints are or how high tech your scanner is, if you scan to the exact same resolution in the exact same format with the exact same metadata - the file your scanner generates will never match the file you originally used. The picture in the file might look the same, but even a single pixel off by an imperceptible degree and your hash output will be different.

Maybe using some kind of QR code or something similar that would be incorporated inside picture would work.
You don't really have to use complete picture for scanning, but just one smaller part and it doesn't really matter what resolution you use in this case.
Problem is how to make something obvious and hidden in the same time... maybe making something like QR code art

Quote from: n0nce on Today at 02:43:30 AM

This reminds me of a Bitcoin puzzle a few years back, which was called 'The Legend of Satoshi Nakamoto'.

This was $50,000 at the time
Bitcoin puzzles are fun but there is always someone smarter than creator who could solve them, and I don't want that with my private keys or seed words Wink

I know there are many ways of hiding information inside digital photos but it's obviously much harder to do that with real life photos.