AI-powered radar tech can spy on phone calls up to 10 feet away

Researchers at Penn State have developed an AI-powered radar system capable of remotely eavesdropping on phone calls by detecting and decoding subtle vibrations from a cellphone’s earpiece. Using millimeter-wave radar—technology commonly found in self-driving cars and 5G networks—combined with a customized AI speech recognition model adapted from OpenAI’s Whisper, the system can capture and transcribe conversations from up to 10 feet away with approximately 60% accuracy over a vocabulary of up to 10,000 words. This represents a significant advancement from their 2022 work, which could only recognize a limited set of predefined words with higher accuracy. The researchers emphasize that while the transcription accuracy is imperfect, even partial recognition of keywords can pose serious privacy and security risks, especially when combined with contextual knowledge. They liken the system’s capabilities to lip reading, which also relies on partial information to infer conversations. The study highlights the potential misuse of such technology by malicious actors to spy on private phone calls remotely,