Patent · US Active

BIOS password security using modified scan codes

US7619544B2 · kind B2 · utility

3Cited by

10References

15Claims

0Family size

Assignee

HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. · US

Inventors

Mark A. Piwonka · Spring, US
Bernard D. Desselle · Spring, US
David J. DeLisle · Spring, US

Key dates

Filing date	Oct 27, 2005
Grant date	Nov 17, 2009
Priority date	—
Expiry date	Jul 31, 2028

Classification

Technology area (CPC G)Physics
CPC primaryG06F21/83
WIPO fieldComputer technology
WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.