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Keyboard acoustic emanations

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2 Author(s)
Asonov, D. ; IBM Almaden Res. Center, San Jose, CA, USA ; Agrawal, R.

We show that PC keyboards, notebook keyboards, telephone and ATM pads are vulnerable to attacks based on differentiating the sound emanated by different keys. Our attack employs a neural network to recognize the key being pressed. We also investigate why different keys produce different sounds and provide hints for the design of homophonic keyboards that would be resistant to this type of attack.

Published in:

Security and Privacy, 2004. Proceedings. 2004 IEEE Symposium on

Date of Conference:

9-12 May 2004

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