| 摘要 |
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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