Le calme avant la tempest

hardware FCSC 2025 solved on

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Description

A TEMPEST attack requires to capture spurious emissions from a device, and process them in order to reconstruct the original signal.

A video signal coming from a screen has been intercepted and could be processed with a raster. The sample rate is 20 MHz. Data is stored as signed integers on 16 bits. Process this signal to see the flag.

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ECO

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