A Practical Deep Learning-Based Acoustic Side Channel Attack on Keyboards

08/02/2023

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by   Joshua Harrison, et al.

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With recent developments in deep learning, the ubiquity of micro-phones and the rise in online services via personal devices, acoustic side channel attacks present a greater threat to keyboards than ever. This paper presents a practical implementation of a state-of-the-art deep learning model in order to classify laptop keystrokes, using a smartphone integrated microphone. When trained on keystrokes recorded by a nearby phone, the classifier achieved an accuracy of 95 When trained on keystrokes recorded using the video-conferencing software Zoom, an accuracy of 93 the practicality of these side channel attacks via off-the-shelf equipment and algorithms. We discuss a series of mitigation methods to protect users against these series of attacks.