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Make sure to remember to have at least one computer without internet access for your backups.

Make sure to remember to have at least one computer without internet access for your backups.

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[–] • 1 pt

If it's truly airgapped then data can't be sent, by definition. There are so many channels for covert transmission: blinking LEDs, power supply noise due to changing load, speakers in PC, RF emissions due to bus activity, embedded cell radios in chips, bluetooth and WiFi adapters.