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:
Nov. 11, 2014
Filed:
Apr. 11, 2011
Benjamin E. Nick, Bellevue, WA (US);
Magnus BO Gustaf Nyström, Sammamish, WA (US);
Cristian M. Ilac, Sammamish, WA (US);
Niels T. Ferguson, Redmond, WA (US);
Nils Dussart, Kenmore, WA (US);
Benjamin E. Nick, Bellevue, WA (US);
Magnus Bo Gustaf Nyström, Sammamish, WA (US);
Cristian M. Ilac, Sammamish, WA (US);
Niels T. Ferguson, Redmond, WA (US);
Nils Dussart, Kenmore, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
A key recovery request for a device is received at a key recovery service and a particular one-time recovery credential in a sequence of multiple one-time recovery credentials is identified. In the sequence of multiple one-time recovery credentials, previous one-time recovery credentials in the sequence are indeterminable given subsequent one-time recovery credentials in the sequence. A recovery key associated with the device is also identified. The particular one-time recovery credential in the sequence is generated based on the recovery key, and is returned in response to the key recovery request. The particular one-time recovery credential can then be used by the device to decrypt encrypted data stored on a storage media of the device.