A new secret channel attack emerges after Korean researchers figured out a way
to steal data from an air-gapped system using its internal speakers.
to steal data from an air-gapped system using its internal speakers.
The concept, dubbed CASPER, was brought to life thanks to the academic efforts
of researchers Hyeongjun Choi, Ji Hyuk Jung and Ji Won Yoon at Korea
University’s School of Cyber Security.
CASPER relies on the system’s speakers to generate sounds at a specific
frequency, which are then inconspicuously recorded with a small device, such as
a smartphon
