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February 02nd, 2012

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HomeArticlesAcoustic Surveillance of Physically Unmodified PCs

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Acoustic Surveillance of Physically Unmodified PCs

by Michael LeMay, Jack Tan

AUTHORS' DESCRIPTION

Computer equipment produces a wide range of emanations in the visible, electromagnetic, and acoustic spectra. It is well known that electromagnetic emanations can reveal information about the operations being performed by a machine, and it has recently been shown that acoustic emanations can do the same. Additionally, techniques have been developed to manipulate electromagnetic emanations so that they surreptitiously transmit data to a remote receiver. In this paper, we similarly demonstrate how acoustic emanations can be manipulated to transmit arbitrary data and show how this technique can be used to create a practical, software-only acoustic keylogger. Finally, we recommend countermeasures to prevent such an attack from being performed.


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HomeArticlesAcoustic Surveillance of Physically Unmodified PCs

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Installing computer monitoring tools on computers you do not own or do not have permission to monitor may violate local, state or federal law.

Logging other people's keystrokes or breaking into other people's computer without their permission can be considered illegal by the courts of many countries. The monitoring software reviewed here is ONLY for authorized system administrators and/or owners of computers. We assume no liability and are not responsible for any misuse or damage caused by the keylogging software. The end user of this software is obliged to obey all applicable local, state, federal and other laws in his country of residence.