Researchers from the National University of Singapore and Yonsei University in the Republic of Korea have invented a device that can detect whether malware has access to a laptop microphone without permission.

The prototype device, codenamed TickTock, described in a paper (opens in new tab) titled “TickTock: Detecting Microphone Status in Laptops Using Electromagnetic Clock Leakage,” is so named because of the way it monitors electromagnetic (EM) leakage from laptop microphone clock signals.

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