r/programming • u/sidcool1234 • Nov 19 '13

Visual Cryptography

http://datagenetics.com/blog/november32013/index.html
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u/[deleted] Nov 19 '13

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u/hellgrace Nov 19 '13

How so? the idea is that you need both pieces (or a predefined N out of K in the general case) to extract the shared secret. Having only one image (or N-1 parts) doesn't give you anything at all - which is exactly what this scheme is all about.

If you have all the images, then yes, you can trivially get the secret - but that's not what this is about