Mobility

On the Practicality of Motion Based Keystroke Inference Attack

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Executive Summary

Recent researches have shown that motion sensors may be used as a side channel to infer keystrokes on the touch-screen of Smartphones. However, the practicality of this attack is unclear. For example, does this attack work on different devices, screen dimensions, keyboard layouts, or keyboard types? Does this attack depend on specific users or is it user independent? To answer these questions, the authors conducted a user study where 21 participants typed a total of 47,814 keystrokes on four different mobile devices in six settings. Their results show that this attack remains effective even though the accuracy is affected by user habits, device dimension, screen orientation, and keyboard layout.

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