UI Side Channel Snooping Victor switches to an LCD display Any other ways Ann can still steal his display contents or his keystrokes Cables from computer to screen keyboard act as crude antennas Broadcast weak RF signals corresponding to data streams Even induce faint voltage fluctuations in power lines Keystrokes create sound Audio components unique per key Timing reflects key sequencing touch typing patterns If language known can employ spell checking to clean up errors Can listen from a distance using laser telescope UI Side Channel Snooping Victor switches to an LCD display Any other ways Ann can still steal his display contents or his keystrokes Cables from computer to screen keyboard act as crude antennas Broadcast weak RF signals corresponding to data streams Even induce faint voltage fluctuations in power lines Keystrokes create sound Audio components unique per key Timing reflects key sequencing touch typing patterns If language known can employ spell checking to clean up errors Can listen from a distance using laser telescope
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