| 摘要 |
A desktop cellular phone includes a SIM card with security features. To increase the difficulty of SIM PIN cracking, a SIM PIN is generated, then is encrypted by an encryption algorithm and stored in the SIM card's nonvolatile, or flash, memory. The phone's provider or carrier may use its own software program, or another suitable program, in the phone to decrypt the SIM PIN and to gain access to the features and information stored in the SIM card. As a result of the SIM PIN being encrypted, even if an unscrupulous user is able to identify the SIM PIN position in the SIM card's flash memory, it is very difficult for the unscrupulous user to obtain the PIN itself.
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