System, computer program product and method of preventing...

Details System, computer program product and method of preventing... System, computer program product and method of preventing...

2006-01-19

2010-02-23

Liang, Regina (Department: 2629)

Computer graphics processing and selective visual display system

Display peripheral interface input device

Including keyboard

Reexamination Certificate

active

07667691

ABSTRACT:
A system, computer program product and method of preventing recordation of true keyboard acoustic emanations are provided. In an embodiment, it is determined whether a user has stricken a key on a keyboard. In response to the stricken key a keystroke sound from a mask which is dissimilar to a keystroke sound produced by the stricken key is emitted to drown out the keystroke sound of the stricken key. In another embodiment, when a plurality of keys is stricken, a random keystroke sound is emitted between keystroke sounds made by two stricken keys to blur out word boundaries.

REFERENCES:
patent: 6798887 (2004-09-01), Andre
patent: 2003/0078515 (2003-04-01), Menzel et al.
patent: 2007/0140504 (2007-06-01), Tribble et al.
Keyboard Acoustic Emanations, Asonov and Agrawal, IBM Almaden Research Center.
Keyboard Acoustic Emanations Revisited, Zhuang, Zhou and Tyler, University of California, Berkeley.
Acoustic Spying Decodes Typists' Tapping, ABC News Online, Sep. 15, 2005.

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