Researchers found a way to eavesdrop on headphones from 30 meters away, and encryption can't stop it

The research comes from the Hong Kong University of Science and Technology in Guangzhou and the Hong Kong Polytechnic University. The team presented its paper, "Injected and Leaked: Actively Inducing Side-Channel Leakage Using Electromagnetic Injection and Hardware Nonlinearity," at USENIX Security 2026.