BIOS password security using modified scan codes

Details BIOS password security using modified scan codes BIOS password security using modified scan codes

2005-10-27

2009-11-17

Wong, Albert K (Department: 2612)

Coded data generation or conversion

Bodily actuated code generator

Including keyboard or keypad

C341S022000, C726S005000, C726S017000, C726S028000, C726S034000, C713S002000, C713S001000, C713S168000, C713S182000, C713S183000, C713S184000, C340S005100, C340S005850, C710S005000, C710S200000, C710S067000

Reexamination Certificate

active

07619544

ABSTRACT:
A BIOS password security technique includes first logic operable to extract a down scan code from a keyboard input queue, the down scan code having a most significant bit; second logic operable to examine case-related auxiliary information; and third logic operable to set the state of the most significant bit responsive to the case-related auxiliary information, thereby creating a modified scan code.

REFERENCES:
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patent: 6397337 (2002-05-01), Garrett et al.
patent: 6618810 (2003-09-01), Dirie
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patent: 7367062 (2008-04-01), Chang
patent: 7376968 (2008-05-01), Ritz et al.
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patent: 7429911 (2008-09-01), Hirose
patent: 7484241 (2009-01-01), Challener et al.
patent: 7540023 (2009-05-01), Ito et al.

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