Post Syndicated from Bruce Schneier original https://www.schneier.com/blog/archives/2025/08/eavesdropping-on-phone-conversations-through-vibrations.html

Researchers have managed to eavesdrop on cell phone voice conversations by using radar to detect vibrations. It’s more a proof of concept than anything else. The radar detector is only ten feet away, the setup is stylized, and accuracy is poor. But it’s a start.