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:
Oct. 25, 2011
Filed:
Jun. 07, 2006
Carl M. Ellison, Seattle, WA (US);
Jamie Hunter, Bothell, WA (US);
Kenneth D. Ray, Seattle, WA (US);
Niels T. Ferguson, Redmond, WA (US);
Philip J. Lafornara, Bellevue, WA (US);
Russell Humphries, Redmond, WA (US);
Carl M. Ellison, Seattle, WA (US);
Jamie Hunter, Bothell, WA (US);
Kenneth D. Ray, Seattle, WA (US);
Niels T. Ferguson, Redmond, WA (US);
Philip J. Lafornara, Bellevue, WA (US);
Russell Humphries, Redmond, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
Access to a storage device, such as a disk, is controlled by performing a disk operation using a single cryptographic engine. Keys associated with each layer of a layered structure associated with controlling access to the storage device are combined. The resultant of this combination is used as the key to the cryptographic engine. Data to be retrieved from and written to the storage device are operated on by the cryptographic engine utilizing the combined key. Keys are combined by combining functions associated with layers of the layered structure. A combining function can include an exclusive or function, a cryptographic hash function, or a combination thereof.