SUBSIDY-CONTROLLED HANDSET DEVICE VIA A SIM CARD USING ASYMMETRIC VERIFICATION AND METHOD THEREOF

摘要

A handset device (100) enabled for subsidy control via a SIM card (150) includes memory (110) operative to store an activation file (112) and a public key (114) and a controller (120) operatively coupled to the memory. The controller (120) is operative to send an activation file request to a SIM card (150), to receive an asymmetrically digitally signed activation file (214) from the SIM card (150), to verify the asymmetric digital signature of the activation file (214) via the public key (114) and to install the activation file (112) in the memory (110). A SIM card device (150) enabled for subsidy control of a handset device (100) includes memory (110) operative to store an activation file template (162) and a private key (164) and a controller (170) operatively coupled to the memory (160). The controller (170) is operative to receive an activation file request (212) from a handset device (100), to bind an activation file template 162 to the handset device to generate a bound activation file, to asymmetrically digitally sign the bound activation file via the private key (164) to generate an asymmetrically digitally signed activation file (214), and to send the asymmetrically digitally signed activation file (214) to the handset device (100). Related methods are also disclosed.