You’re muted… or are you? Videoconferencing apps may listen even when mic is off

Jason Daley reports:

Kassem Fawaz’s brother was on a videoconference with the microphone muted when he noticed that the microphone light was still on—indicating, inexplicably, that his microphone was being accessed.

Alarmed, he asked Fawaz, an expert in online privacy and an assistant professor of electrical and computer engineering at the University of Wisconsin–Madison, to look into the issue.

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