Questions tagged [cops-and-robbers]

For challenges which consist of two adversary (and asymmetric) sub-challenges.

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Hide a message in an image - Cops

Robbers thread Your task is to create a method for hiding information in an image. You will post three encoded messages of your choice (keep them classy), each with its associated image. Reveal the ...
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Hide a message in an image - Robbers

Choose a challenge from the Cops thread, determine the third hidden message, and describe how the system works. Keep in mind limitations and possibilities available to Cops: You are not expected to ...