VoiceSecure threats model. Credit: Nirupam Roy, University of Maryland. When you make a voice call through Zoom, FaceTime or WhatsApp, you're not just sharing what you say. You're revealing your age, gender, emotional state, social background and personality—a biometric fingerprint just as unique as your face. And increasingly, artificial intelligence is listening. "We already see phishing based on our online activities and what we type in emails," said Ni