Direct peripheral communication for restricted mode operation

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 8255988
APP PUB NO 20080238612A1
SERIAL NO

11692237

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Importance

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Abstract

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A computer that self-administers operating in restricted and unrestricted operating modes boots from a main processor and operates normally in the unrestricted operating mode and operates from an alternate processor in a security module in the restricted operating mode. The alternate processor may communicate directly with peripheral devices such as a display controller and keyboard. Because the main processor is not used and may not even be started in the restricted operating mode, viruses, shims, and other related attacks are virtually eliminated. In one embodiment, the security module may operate as a PCI bus master when in the restricted operating mode.

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Patent Owner(s)

  • MICROSOFT TECHNOLOGY LICENSING, LLC

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Carpenter, Todd L Monroe, US 66 1271

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