Method and device for managing identifier of EUICC

1. A method for identifier management, the method comprising:

receiving, by an embedded universal integrated circuit card (eUICC) that is installed in a terminal device, an identifier information request; and

determining, by the eUICC, whether or not at least one network operator profile that is in an enabled state exists; and

providing a response comprising identifier information to the identifier information request based on a result of the determining,

wherein the identifier information is generated based on unique identifier information of the eUICC based on determining that none of the at least one network operator profile is in the enabled state, and

wherein the identifier information is generated based on an identifier of the at least one network operator profile that is in the enabled state, instead of the identifier of the eUICC, based on determining that at least one of the at least one network operator profile is in the enabled state.

2. The method of claim 1 , wherein the unique identifier information of the eUICC comprises at least one identifier information field selected from among a major industry identifier (MII) field, a manufacturer identifier number field, a manufacturer private number field, and a Luhn check digit field.

3. The method of claim 1 , wherein the identifier information of the at least one network operator profile in the enabled state comprising one of an Integrated Circuit Card Identification (ICCID) and a modified ICCID.

4. The method of claim 1 , wherein the identifier information request is an ICCID information request and wherein the providing the response to the ICCID information request comprises:

in response to determining yielding that none of the at least one network operator profile is in the enabled state, the identifier information in the response is generated based on the unique identifier information of the eUICC; and

in response to determining yielding that at least one of the at least one network operator profile is in the enabled state, the identifier information in the response is generated in ICCID format and is based on the identifier information of the at least one network operator profile that is in the enabled state.

5. The method of claim 1 , in response to the determining yielding that said at least one of the at least one network operator profile is in the enabled state in the eUICC, further determining whether more than one of said at least one network operator profile is enabled, and in response to further determining yielding that more than said one of the at least one network operator profile is enabled, the identifier information in the response is generated based on identifier information of a most-recently used network operator profile.

6. The method of claim 1 , wherein the eUICC stores at least one of ICCID information, the unique identifier information of the eUICC, and at least one piece of profile identifier information.

7. The method of claim 6 , wherein the eUICC stores the ICCID information and the unique identifier information of the eUICC in a shared file system and stores the at least one piece of profile identifier information in a corresponding profile directory.

8. The method of claim 6 , wherein a file system in the eUICC is divided in units of profiles and each of said units respectively store the ICCID information, the unique identifier information of the eUICC, and the at least one piece of profile identifier information.

9. The method of claim 1 , wherein the eUICC stores a plurality of network operator profiles including said at least one network operator profile, each of the plurality of network operator profiles comprises an operational profile and a provisioning profile which comprises a network access application and a communication network access credential.

10. The method of claim 1 , wherein the enabled state indicates that the at least one network operator profile provides a shared file system of the eUICC with an Integrated Circuit Card Identification (ICCID) value stored as a profile identifier.

11. An embedded universal integrated circuit card (eUICC) comprising:

a processor configured to:

receive an identifier information request,

make a determination whether or not at least one network operator profile that is in an enabled state exists, based on the received request, and

provide a response comprising identifier information to the identifier information request based on a result of the determination; and

a memory configured to store the identifier information,

wherein the identifier information is generated based on unique identifier information of the eUICC based on determining that none of the at least one network operator profile is in the enabled state, and

wherein the identifier information is generated based on an identifier of the at least one network operator profile that is in the enabled state, instead of the identifier of the eUICC, based on determining that at least one of the at least one network operator profile is in the enabled state.

12. The eUICC of claim 11 , wherein the memory stores the unique identifier information of the eUICC comprising at least one identifier information field selected from among a major industry identifier (MII) field, a manufacturer identifier number field, a manufacturer private number field, and a Luhn check digit field.

13. The eUICC of claim 11 , wherein the memory stores the identifier information of the at least one network operator profile comprising one of an Integrated Circuit Card Identification (ICCID) and a modified ICCID.

14. The eUICC of claim 11 , wherein the identifier information request is an ICCID information request, and

wherein, in response to the processor determining that none of the at least one network operator profile is in the enabled state, the identifier information in the response is generated based on the unique identifier information of the eUICC, and

wherein in response to the processor determining that at least one of the at least one network operator profile is in the enabled state, the identifier information in the response is generated in an ICCID format and based on the identifier information of the at least one network operator profile that is in the enabled state.

15. The eUICC of claim 11 , wherein, in response to the processor determining that said at least one of the at least one network operator profile is in the enabled state in the eUICC, the processor further determines whether more than one of said at least one network operator profile being enabled exist, and in response to the processor further determining that more than said one of the at least one network operator profile being enabled exist, the identifier information in the response is generated based on identifier information of a most-recently used network operator profile.

16. The eUICC of claim 11 , wherein the memory is configured to store, as the identifier information, at least one of ICCID information, the unique identifier information of the eUICC, and at least one piece of profile identifier information.

17. The eUICC of claim 16 , wherein the memory is configured to store the ICCID information and the unique identifier information of the eUICC in a shared file system and stores the at least one piece of profile identifier information in a corresponding profile directory.

18. The eUICC of claim 16 , wherein the memory is configured to store a file system which is divided into units of profiles such that each of said units respectively store the ICCID information, the unique identifier information of the eUICC, and the at least one piece of profile identifier information in a profile file system.

19. The eUICC of claim 11 , wherein the enabled state indicates that the at least one network operator profile provides a shared file system of the eUICC with an Integrated Circuit Card Identification (ICCID) value stored as a profile identifier.