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research
Researchers find way to listen in on headphones from afar
Researchers from Hong Kong institutions have demonstrated InjectEave, an electromagnetic side-channel attack that allows eavesdropping on headphones, landline phones, and smart devices from up to 30 meters away by injecting radio frequency signals into non-linear hardware components. The technique was tested on 11 commercial devices from manufacturers including Sony, Apple, HP, and Philips, with successful audio recovery at distances between 1 and 6 meters, and through walls. The attack requires commodity software-defined radio equipment and is immune to digital defenses like encryption since the leakage originates from analog hardware.
Why it matters: Organizations and individuals using wired or wireless headphones, VoIP systems, and smart home devices are exposed to remote eavesdropping; practitioners should evaluate whether affected devices in their environments warrant hardware mitigations such as shielding or twisted-pair wiring, and consider the espionage and surveillance risks specific to sensitive conversations or facilities.
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- First seen by Cybersecurity Tracker