Author of the paper here; AMA.
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BTW, project summary is here https://www.pwnshow.com/investigations/INV-006/
I would recommend having a look at advanced side-channel PCIe bus DMA taps used by game cheats. They use a second computer along with an external HDMI mask-overlay mixer, to dump the target computers internal game-engine state through unencrypted DMA access to the overlay channel. Thus, gives the cheaters x-ray vision and aim-bot features for games protected by kernel level anti-cheat software.
Highly entertaining nuisance users. =3
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