How I discovered a hidden microphone on a Chinese NanoKVM

Re:How I discovered a hidden microphone on a Chinese NanoKVM by ndsipa_pomu on Saturday December 06, 2025 @11:29AM (#46174545)

I wonder if that's feasible in a room filled with many servers and fans going?

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Re:How I discovered a hidden microphone on a Chinese NanoKVM by runjake on Saturday December 06, 2025 @12:14PM (#46174891)

Yes, just modulate the fan noise on the transmitter, and apply a filter on the receiver.

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Re:How I discovered a hidden microphone on a Chinese NanoKVM by faidit on Saturday December 06, 2025 @09:00PM (#46178525)

Doesn't being able to modulate the fan presume you already control the target device?

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Re:How I discovered a hidden microphone on a Chinese NanoKVM by alextingle on Sunday December 07, 2025 @05:50AM (#46180795)

It's possible to get malware onto even air-gapped machines. This is a way to then communicate across the air-gap.

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