Subsidy lock enabled handset device with asymmetric verification unlocking control and method thereof
First Claim
1. A method for controlling subsidy locking of a handset device comprising:
- storing, in the handset device, an asymmetrically digitally signed subsidy unlock data block that comprises a password portion that is modified after the subsidy unlock data block is digitally signed;
replacing the modified password portion with a received subsidy unlock password to produce an updated subsidy unlock data block for verification; and
granting subsidy unlock status if the updated subsidy unlock data block properly verifies based on an asymmetric digital signature verification process.
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Accused Products
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 (505); modifying the stored unlock data block based on a received subsidy unlock password (510); and granting subsidy unlock status if the asymmetric digital signature of the modified, stored unlock data block properly verifies (510). A method (110) 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 (112); replacing the contents of the modified password portion with a received subsidy unlock password to produce an updated subsidy unlock data block (116); and granting subsidy unlock status if the asymmetric digital signature of the updated subsidy unlock data block properly verifies (118).
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Citations
30 Claims
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1. A method for controlling subsidy locking of a handset device comprising:
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storing, in the handset device, an asymmetrically digitally signed subsidy unlock data block that comprises a password portion that is modified after the subsidy unlock data block is digitally signed; replacing the modified password portion with a received subsidy unlock password to produce an updated subsidy unlock data block for verification; and granting subsidy unlock status if the updated subsidy unlock data block properly verifies based on an asymmetric digital signature verification process. - View Dependent Claims (2, 3, 4, 5)
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6. A subsidy-locked handset device comprising:
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memory storing an asymmetrically digitally signed subsidy unlock data block comprising a password portion that is modified after the subsidy unlock data block is digitally signed; and a controller operatively coupled to the memory and operative to replace the password portion with a received subsidy unlock password to produce an updated subsidy unlock data block for verification and to grant subsidy unlock status if the updated subsidy unlock data block properly verifies based on an asymmetric digital signature verification process. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. A storage medium comprising executable instructions that when read by one or more processing units, causes the one or more processing units to:
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store, in the handset device, an asymmetrically digitally signed subsidy unlock data block comprising a password portion that is modified after the subsidy unlock data block is digitally signed; replace the password portion with a received subsidy unlock password to produce an updated subsidy unlock data block for verification; and grant subsidy unlock status if the updated subsidy unlock data block properly verifies based on an asymmetric digital signature verification process. - View Dependent Claims (15, 16, 17, 18)
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19. A method for controlling subsidy locking of a handset device comprising:
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storing, in a handset device, an asymmetrically digitally signed subsidy unlock data block that has been modified after signing wherein the modification is based on a password; modifying the stored asymmetrically digitally signed subsidy unlock data block based on a received subsidy unlock password; and granting subsidy unlock status if the modified, stored asymmetrically digitally signed subsidy unlock data block properly verifies based on an asymmetric digital signature verification process. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification