ChargerWhisper: Acoustic Side-Channel Attack Exploiting Fast Charger

ChargerWhisper is a side-channel attack (a method that steals information by observing physical properties rather than breaking encryption) that uses high-frequency inaudible sounds produced by fast chargers to infer private user information. The attack works because electronic components in chargers vibrate at frequencies correlated with power output, which changes based on what activities users perform on their devices, allowing attackers to identify websites being visited or unlock PINs through acoustic analysis.