Audio Stego ^new^
It was a blueprint. A schematic for a desalination plant in the Black Sea.
Audio steganography has various applications: audio stego
The harsh static turned into a low, rhythmic thrumming. It sounded like a heartbeat. A very slow, very digital heartbeat. It was a blueprint
But overlaid on the blueprint, in bright red text, were deployment zones. Coordinates for something small, heavy, and radioactive. in bright red text