alt Hacker News> Any signal that you can modulate can be an exfiltration channel, and fan noise is no different.
This KVM has HDMI input and can directly emulate USB mass storage; fan-modulation is the lowest-bandwidth (side-)channel available to the attackers.
> Any signal that you can modulate can be an exfiltration channel, and fan noise is no different.
This KVM has HDMI input and can directly emulate USB mass storage; fan-modulation is the lowest-bandwidth (side-)channel available to the attackers.
You can exfiltrate data from a machine which is not connected to the KVM. A high-security machine may be even air-gapped most of the time, but be physically nearby.