* Researchers were able to use data collected by navigation sensors to record audio signals * Ingenious technique may be able to spy on some sensitive data, but requires a large amount of effort A team of researchers have explained how internet-connected robot vacuum cleaners can be hacked to eavesdrop on homeowners’ private conversations. Researchers from the University of Maryland, College Park and the National University of Singapore have published research detailing how they were able to launch an ingenious attack that could stealthily snoop on people without their knowledge – despite there being no actual acoustic microphone built into the vacuum cleaner.

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