The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 01, 2017
Filed:
Jun. 16, 2014
Green Hills Software, Inc., Santa Barbara, CA (US);
Daniel O'Dowd, Santa Barbara, CA (US);
David Kleidermacher, Santa Barbara, CA (US);
Thomas Cantrell, Oxnard, CA (US);
Dennis Kou, Goleta, CA (US);
Daniel Hettena, Princeton, NJ (US);
Green Hills Software, Inc., Santa Barbara, CA (US);
Abstract
Certain embodiments employ an 'out-of-band' mechanism to remove the physical controls for activating input peripherals from a portable device operating system and instead controlled by a separate peripheral control domain, isolated from the operating system domain by a machine virtualization/isolation technology. No additional hardware may be required. An adjunct I/O virtualization mechanism may also be included to abstract the guarded input peripheral interfaces, such that all attempts to turn them on from within the operating system are automatically redirected by the I/O virtualization mechanism to the peripheral control domain. The peripheral control domain may then conduct a policy-driven decision process to either allow, disallow, or request manual/explicit authorization of an access attempts. Physical access may be performed within the peripheral control domain. Because the access control and physical activation of input peripherals occur out-of-band from the operating system, these security-critical operations may be immune to vulnerabilities in the portable operating system.