Question: In C#... How to write code to get affine cipher keys to decrypt file from an encrypted .bin file ? Example: .jpg file is encrypted

In C#...

How to write code to get affine cipher keys to decrypt file from an encrypted .bin file?

Example: .jpg file is encrypted using keys a,b into a .bin file. Key a must be relativly prime to 256 and key b can be any number between 1 and 256. How to decrypt without knowing keys and solving for what keys are.

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