Test grade shielded HDMI connectors would probably mitigate this. They’re generally about $50 for 2 meters.
I’d also expect this attack to only work within a few feet of the target system. The author admits that the quality of transmission is pretty heavily affected by antenna and cable orientation. The bigger concern IMO is proximity - if you’re close enough to pull this off, you’re already at “physical access” levels of threat to a secure system.
I’d also expect this attack to only work within a few feet of the target system. The author admits that the quality of transmission is pretty heavily affected by antenna and cable orientation. The bigger concern IMO is proximity - if you’re close enough to pull this off, you’re already at “physical access” levels of threat to a secure system.