ANTI-CRACK METHOD AND DEVICE FOR NETWORK-LOCKED MOBILE TERMINAL, AND NETWORK-LOCKED MOBILE TERMINAL

• US 20120220269A1
• Filed: 04/23/2010
• Published: 08/30/2012
• Est. Priority Date: 11/02/2009
• Status: Active Grant

• Current Assignee: ZTE Corporation
• Original Assignee: ZTE Corporation
• Inventors: Feng, Kai
• Granted Patent: US 8,923,917 B2
• Time in Patent Office: Days
• US Class Current: 455/411
• CPC Class Codes: H04L 63/0853 using an additional device, e.g. smartcard, SIM or a different communication terminal cryptographic mechanisms or cryptographic arrangements for entity authentication involving additional secure or trusted devices H04L9/3234
• CPC Class Codes: H04W 12/08 Access security
• CPC Class Codes: H04W 12/126 Anti-theft arrangements, e.g. protection against subscriber identity module [SIM] cloning
• CPC Class Codes: H04W 12/48 using secure binding, e.g. securely binding identity modules to devices, services or applications

Abstract

An anti-crack method for a network-locked mobile terminal is provided. The method includes the following steps: when a mobile terminal starts up, a Subscriber Identity Module (SIM) card reports first network lock information to the mobile terminal; when the mobile terminal is in an activated network-locked state, it judges whether the first network lock information is legal; if the first network lock information is illegal, the mobile terminal locks the SIM card; and if the first network lock information is legal, the mobile terminal initiatively read the second network lock information and judge whether the second network lock information is legal; if the second network lock information is legal, the mobile terminal begins to search the network; and if the second network lock information is illegal, the mobile terminal locks the SIM card. Accordingly, a network-locked mobile terminal is provided, which includes: a SIM card, an activation judging module, a network locking module, a network searching module, a card locking module, and an anti-crack device. An anti-crack device for the network-locked mobile terminal is also provided, which includes: an initialization judging unit, a reading unit, and a judgment unit. Thus, the present method is able to prevent the network-locked mobile terminal from being cracked.

Claims

1. An anti-crack method for a network-locked mobile terminal, comprising:

when the mobile terminal starts up, reporting, by a Subscriber Identity Module (SIM) card, first network lock information to the mobile terminal;

when the mobile terminal is in an activated network-locked state, judging whether the first network lock information is legal;

locking the SIM card when the first locking network information is judged illegal and initiatively reading second network lock information and judging whether the second network lock information is legal when the first locking network information is judged legal; and

beginning to search the network when the second network lock information is legal and locking the SIM card when the second network lock information is illegal.

2. The anti-crack method for the network-locked mobile terminal according to claim 1, wherein the initiatively reading the second network lock information comprises:

judging whether the SIM card has completed initialization; and

allowing the SIM card to continue the initialization when the initialization is judged not completed and, initiatively reading the second network lock information when the initialization is judged completed.

3. The anti-crack method for the network-locked mobile terminal according to claim 1, wherein

the first network lock information comprises a Mobile Country Code (MCC) and a Mobile Network Code (MNC), or an Integrated Circuit Card Identity (ICCID);

when the MCC and MNC are used as the first network lock information, the judging whether the first network lock information is legal comprises;

judging whether the MCC and MNC reported by the SIM card are identical to corresponding information in an International Mobile Subscriber Identity (IMSI) stored in the mobile terminal;

determining the first network lock information as legal when judged identical; and

determining the first network lock information as illegal when judged not identical;

or

when ICCID is used as the first network lock information, the judging whether the first network lock information is legal comprises;

judging whether the ICCID reported by the SIM card is identical to an ICCID stored in the mobile terminal;

determining the first network lock information as legal when judged identical; and

determining the first network lock information as illegal when judged not identical.

4. The anti-crack method for the network-locked mobile terminal according to claim 1, wherein

the second network lock information comprises an IMSI or an ICCID;

when the IMSI is used as the second network lock information, the judging whether the second network lock information is legal comprises;

judging whether the read IMSI is identical to an International Mobile Subscriber Identity (IMSI) stored in the mobile terminal;

determining the second network lock information as legal when judged identical; and

determining the second network lock information as illegal when judged not identical;

or

when the ICCID is used as the second network lock information, the judging whether the second network lock information is legal comprises;

judging whether the read ICCID is identical to an ICCID stored in the mobile terminal;

determining the second network lock information as legal when judged identical; and

determining the second network lock information as illegal when judged not identical.

11. The anti-crack method for the network-locked mobile terminal according to claim 2, wherein

the first network lock information comprises a Mobile Country Code (MCC) and a Mobile Network Code (MNC), or an Integrated Circuit Card Identity (ICCID);

when the MCC and MNC are used as the first network lock information, the judging whether the first network lock information is legal comprises;

judging whether the MCC and MNC reported by the SIM card are identical to corresponding information in an International Mobile Subscriber Identity (IMSI) stored in the mobile terminal;

if identical, determining the first network lock information as legal; and

if not identical, determining the first network lock information as illegal;

or

when ICCID is used as the first network lock information, the judging whether the first network lock information is legal comprises;

judging whether the ICCID reported by the SIM card is identical to an ICCID stored in the mobile terminal;

if identical, determining the first network lock information as legal; and

if not identical, determining the first network lock information as illegal.

12. The anti-crack method for the network-locked mobile terminal according to claim 2, wherein

the second network lock information comprises an IMSI or an ICCID;

when the IMSI is used as the second network lock information, the judging whether the second network lock information is legal comprises;

judging whether the read IMSI is identical to an International Mobile Subscriber Identity (IMSI) stored in the mobile terminal;

if identical, determining the second network lock information as legal; and

if not identical, determining the second network lock information as illegal;

or

when the ICCID is used as the second network lock information, the judging whether the second network lock information is legal comprises;

judging whether the read ICCID is identical to an ICCID stored in the mobile terminal;

if identical, determining the second network lock information as legal; and

if not identical, determining the second network lock information as illegal.

5. A network-locked mobile terminal, comprising a Subscriber Identity Module (SIM) card, an activation judging module, a network locking module, a network searching module, a card locking module and an anti-crack device, wherein

the SIM card is configured to report first network lock information to the network locking module;

the activation judging module is configured to judge whether the network-locked mobile terminal is in an activated network-locked state, and to inform the network locking module when the mobile terminal is in the activated network-locked state;

the network locking module is configured to receive the first network lock information, to judge whether the first network lock information is legal when the network-locked mobile terminal is in the activated network-locked state, and to inform the card locking module when the first network lock information is illegal, and to inform the card locking module when the first network lock information is illegal;

the network searching module is configured to search the network;

the card locking module is configured to lock the SIM card; and

the anti-crack device is configured to initiatively read second network lock information, to judge whether the second network lock information is legal, to inform the network searching module when the second network lock information is legal, and to inform the card locking module when the second network lock information is illegal.

6. The network-locked mobile terminal according to claim 5, wherein

the anti-crack device is specifically configured to judge periodically whether the SIM card has completed initialization, to initiatively read the second network lock information when the SIM card has completed the initialization, and to judge again whether the SIM card has completed the initialization after a predetermined time interval if the SIM card has not completed initialization;

and

the activation judging module is further configured to inform the network searching module when the network-locked mobile terminal is in an inactivated network-locked state.

7. The network-locked mobile terminal according to claim 6, wherein the anti-crack device comprises an initialization judging unit, a reading unit and a judging unit, wherein

the initialization judging unit is configured to judge periodically whether the SIM card has completed the initialization, and to inform the reading unit when the initialization is completed;

the reading unit is configured to initiatively read the second network lock information after the SIM card completes the initialization;

the judgment unit is configured to judge whether the second network lock information is legal, to inform the network-locked mobile terminal to search the network when the second network lock information is legal, and to inform the network-locked mobile terminal to lock the SIM card when the second network lock information is illegal.

8. The network-locked mobile terminal according to claim 5, wherein the first network lock information comprises a Mobile Country Code (MCC) and a Mobile Network Code (MNC), or comprises an Integrated Circuit Card Identity (ICCID);

and the second network lock information comprises an International Mobile Subscriber Identity (IMSI), or comprises the ICCID.

9. An anti-crack device for network-locked mobile terminal, wherein the anti-crack device is configured to initiatively read second network lock information, to judge whether the second network lock information is legal when an Subscriber Identity Module (SIM) card completes an initialization, to inform the network-locked mobile terminal to search network when the second network lock information is legal, and to inform the network-locked mobile terminal to lock the SIM card when the second network lock information is illegal.

10. The anti-crack device for network-locked mobile terminal according to claim 9, wherein the anti-crack device comprises an initialization judging unit, a reading unit and a judging unit, wherein

the initialization judging unit is configured to judge periodically whether the SIM card has completed the initialization, and to inform the reading unit when the initialization is completed;

the reading unit is configured to initiatively read the second network lock information when the SIM card completes the initialization;

the judgment unit is configured to judge whether the second network lock information is legal, to inform the network-locked mobile terminal to search network when the second network lock information is legal, and to inform the network-locked mobile terminal to lock the SIM card when the second network lock information is illegal; and

the first network lock information comprises a Mobile Country Code (MCC) and a Mobile Network Code (MNC), or comprises an Integrated Circuit Card Identity (ICCID); and

the second network lock information comprises an IMSI, or comprises the ICCID.