New Malware Can Jump Air Gaps Using Inaudible Sound

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A team of computer scientists has developed a new breed of malware, which can leap between devices using inaudible audio signals—then covertly transmit passwords and other sensitive data without a network connection.

The inaudible sound, borrowed from techniques used to acoustically transmit data under water, allowed the team to transmit data between two Lenovo T400 laptops using just their built-in microphones and speakers. They could only achieve a data rate of 20 bits per second, but that’s plenty enough to grab passwords and the like, as they write in a paper published in the Journal of Communications.

Via Gizmodo.