Comment on Can you Crack It? Break this cypher, get an interview with GCHQComments−JOnAgain14yWhy oh why wouldn't they put this up there in a copy-able format? Why an image?−ctz14ySpoiler: because the image displays some x86 code (its RC4 with a fixed key), the image file itself contains the ciphertext (in a PNG iTXt block).
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Why oh why wouldn't they put this up there in a copy-able format? Why an image?
Spoiler: because the image displays some x86 code (its RC4 with a fixed key), the image file itself contains the ciphertext (in a PNG iTXt block).