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Cryptographic Puzzle Challenges/sandwich: Difference between revisions
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For this the encoded QR code has to be overlayed with the mask, which is tiled to make an 21x21pixel image - equivalent to the dimensions of the CeasersThree.png | For this the encoded QR code has to be overlayed with the mask, which is tiled to make an 21x21pixel image - equivalent to the dimensions of the CeasersThree.png | ||
Every Pixel where the Mask is coloured, the Pixel in the | Every Pixel where the Mask is coloured, the Pixel in the CaesarsThree.png needs to be flipped - Is it black, make it white and vice versa - until a device readable QR code is revealed | ||
[[File:Sandwich crypto challenge qr decryption.jpg|left|frame|The raw, encoded QR code is overlayed with the Mask and the bits in the source image are flipped accordingly to reveal the QR code]] | [[File:Sandwich crypto challenge qr decryption.jpg|left|frame|The raw, encoded QR code is overlayed with the Mask and the bits in the source image are flipped accordingly to reveal the QR code]] | ||