If I take a picture with my beloved camera, the RAW file can be put into a blockchain, and thus it will have a unique hash.

If that unique hash is ever spotted anywhere we know it's a copy of my photo.

But if someone wants to steal my photo, they could just change a tiny bit of information in the RAW file, and it would result in a new unique hash.

So how can cryptography or the blockchain be used to protect digital assets?

  • $\begingroup$ It seems you are looking for a digital watermarking scheme? $\endgroup$ – Maeher Aug 2 '19 at 10:30
  • $\begingroup$ @Maeher yes, I'll read up on that. $\endgroup$ – webjay Aug 2 '19 at 10:53
  • 1
    $\begingroup$ 1: it can't do that reliably, too many loopholes. 2: besides watermarking, you can publish a fuzzy hash that identifies near matches. $\endgroup$ – Natanael Aug 2 '19 at 17:42

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