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:
Feb. 08, 2011
Filed:
Jun. 30, 2006
Kent D. Rager, Gurnee, IL (US);
Scott P. Debates, Vernon Hills, IL (US);
Joel D. Voss, Elkhorn, WI (US);
Kent D. Rager, Gurnee, IL (US);
Scott P. Debates, Vernon Hills, IL (US);
Joel D. Voss, Elkhorn, WI (US);
Motorola Mobility, Inc., Libertyville, IL (US);
Abstract
A method for controlling subsidy locking of a handset device includes storing, in a handset device, an asymmetrically digitally signed subsidy unlock data block that has been modified based on a password after signing (); modifying the stored unlock data block based on a received subsidy unlock password (); and granting subsidy unlock status if the asymmetric digital signature of the modified, stored unlock data block properly verifies (). A method () for controlling subsidy locking of a handset device includes storing, in the handset device, an asymmetrically digitally signed subsidy unlock data block that comprises a password portion that has been modified after signing (); replacing the contents of the modified password portion with a received subsidy unlock password to produce an updated subsidy unlock data block (); and granting subsidy unlock status if the asymmetric digital signature of the updated subsidy unlock data block properly verifies ().