JP2015228160A - Storage medium device and application execution method - Google Patents

Abstract

When a plurality of applications function in a storage medium device, the storage capacity of the storage medium included in the storage medium device is efficiently used. Application data for each of a plurality of applications functioning under one common application is stored so as to be stored in the same data storage location, and an application selection indicating an application selected from the plurality of applications is provided. A storage medium that stores information, a communication unit that communicates with an external communication device, an application switching control unit that updates application selection information so as to indicate an application selected by the external communication device, and application selection information indicate A storage medium device is configured including an application execution unit that executes processing using application data corresponding to an application. [Selection] Figure 6

Description

  The present invention relates to a storage medium device and an application execution method.

  A plurality of applications can be mounted on an IC (Integrated Circuit) card. As described above, by mounting a plurality of applications on one IC card and switching the applications to execute, a plurality of different functions can be given to one IC card.

The file structure of the IC card is a structure in which two types of files, DF (Dedicated File) and EF (Elementary File), are arranged under the MF (Master File) hierarchy. DF is a file for storing EF and DF, and EF is a file for storing various data.
When a plurality of applications are mounted on the IC card, one DF is created corresponding to each of the plurality of applications. Data used by each application (application data) is managed so as to be stored in the corresponding DF (see, for example, Patent Document 1).

JP 2005-122579 A

When a plurality of applications are mounted on the IC card as described above, there are cases where, for example, the plurality of applications have many equivalent functions except for some differences in functions.
The function of the application is realized by a corresponding program (application program). As a plurality of applications are mounted on the IC card as described above, a plurality of application programs corresponding to the plurality of applications are stored in the IC card. Each application program stored in the IC card processes various files as application data stored in the DF corresponding to the selected application in response to selection of the corresponding application. In this way, the function corresponding to each application is realized by the IC card.

  According to the above, even when a common function is included among a plurality of applications mounted on the IC card, an application program corresponding to each application is stored in the IC card. become. In this case, the program portion corresponding to the function common to the application programs is stored in the IC card in the same way in each application program, and the efficient use of the storage capacity of the IC card is achieved. It is perceived that it is an obstacle.

  The present invention has been made in view of such circumstances, and an object of the present invention is to enable efficient use of the storage capacity of a storage medium included in a storage medium device when a plurality of applications function in the storage medium device. And

  In order to solve the above-described problem, one aspect of the present invention stores application data for each of a plurality of applications functioning under one common application so as to be stored in the same one data storage location. The application selection so that a storage medium storing application selection information indicating an application selected from among the applications, a communication unit communicating with an external communication device, and an application selected by the external communication device are shown A storage medium device comprising: an application switching control unit that updates information; and an application execution unit that executes processing using application data corresponding to an application indicated by the application selection information.

  One aspect of the present invention is the above-described storage medium device, wherein the application switching control unit indicates an application corresponding to application data including a key for which an authentication process with the external communication device is established. The application selection information may be updated.

  One embodiment of the present invention is the above-described storage medium device, wherein the storage medium stores a shared file in which data shared between the plurality of applications is stored in the one data storage position. May be stored.

  One embodiment of the present invention is the above-described storage medium device, wherein the application selection information may be stored in file management information for managing a file as the one data storage location.

  One aspect of the present invention is the above-described storage medium device, and the application selection information may be one file stored in the one data storage location.

  One aspect of the present invention stores application data for each of a plurality of applications that function under one common application so as to be stored in the same one data storage location, and is selected from the plurality of applications. An application execution method in a storage medium device comprising a storage medium for storing application selection information indicating that the communication unit communicates with the external communication device, and the application switching control unit is selected by the external communication device The step of updating the application selection information so as to indicate an application, and the application execution unit, under the common application program, corresponds to an application corresponding to the application indicated by the application selection information. An application execution method comprising the steps of performing the processing using the data.

  As described above, according to the present invention, it is possible to efficiently use the storage capacity of the storage medium included in the storage medium device when a plurality of applications function in the storage medium device.

It is a figure which shows the general example of the data structure in the storage medium of an IC card at the time of mounting a some application in an IC card. It is a figure which shows the example of a file structure of the storage medium corresponding to the data structure shown in FIG. It is a figure which shows the example of a data structure of the storage medium in 1st Embodiment. It is a figure which shows the file structure example of the storage medium in 1st Embodiment. It is a figure which shows the structural example of the IC card in 1st Embodiment. It is a figure which shows the example of a process sequence which the IC card and reader / writer in 1st Embodiment perform. It is a figure which shows the file structure example of the storage medium in 2nd Embodiment. It is a figure which shows the file structure example of the storage medium in 3rd Embodiment. It is a figure which shows the example of a data structure of the storage medium in 4th Embodiment. It is a figure which shows the file structure example of the storage medium in 4th Embodiment.

<Example of storage mode of IC card storage medium>
An IC (Integrated Circuit) card (an example of a storage medium device) according to the present embodiment includes a nonvolatile (non-transitory) storage medium. An application corresponding to the intended use is mounted on the IC card. The application is implemented by storing a program (application program) for realizing a function as an application and data (application data) used by the application in a storage medium.
In mounting a plurality of applications on the IC card, a plurality of application programs corresponding to each of the plurality of applications and a plurality of application data are stored in a storage medium in the IC card.

FIG. 1 shows a general example of a data structure in a storage medium of an IC card when a plurality of applications are mounted on the IC card.
In the description of the figure, a case where two applications are mounted on an IC card is taken as an example. The two applications are a first point service application corresponding to the first point service and a second point service application corresponding to the second point service. The point service provides users with services such that points are awarded according to purchases of goods and services at affiliated stores, etc., and the accumulated points can be used for payment of fees or exchange for prizes. Is.
In addition, the first point service and the second point service are point services operated by different operators, for example. Accordingly, a user who owns an IC card on which the first point service application and the second point service application are mounted can use two different point services with one card.

  As shown in the figure, in the storage medium 103 of the IC card, a program area 131 and an application data area 132 are formed. The program area 131 is an area for storing application program data. The application data area 132 is an area in which application data corresponding to the application program stored in the program area 131 is stored.

The program area 131 stores a first point service application program PRG1 and a second point service application program PRG2.
The first point service application program PRG1 is a program executed by a CPU (Central Processing Unit) of the IC card in order to realize a function as an application corresponding to the first point service (first point service application).
The second point service application program PRG2 is a program executed by the CPU of the IC card in order to realize a function as an application corresponding to the second point service (second point service application).

The application data area 132 stores first point service application data APD1 and second point service application data APD2.
The first point service application data APD1 is application data used under the first point service application. The second point service application data APD2 is application data used under the second point service application.
That is, the first point service application data APD1 is data that is used by the CPU under a state in which the first point service application operates by executing the first point service application program PRG1.
The second point service application data APD2 is data that is used by the CPU under a state in which the second point service application operates by executing the second point service application program PRG2.
As described above, in the storage medium 103 shown in the figure, the first point service application program PRG1 and the first point service application data APD1 are stored so as to be associated with each other. Similarly, in the storage medium 103, the second point service application program PRG2 and the second point service application data APD2 are stored so as to be associated with each other.

FIG. 2 shows a file structure example of the storage medium 103 corresponding to the first point service application data APD1 and the second point service application data APD2 included in the data structure shown in FIG.
The file structure in the IC card is a structure in which a DF (Dedicated File) and an EF (Elementary File) are arranged under the MF (Master File) hierarchy.

DF (an example of a data storage location) is a file for grouping lower EFs and DFs. A file identifier is assigned to the DF. The file identifier assigned to the DF is determined to be unique within the file structure. The DF file identifier also functions as an identifier for identifying an application, and is specified to be unique in the file structure.
The EF is a file for storing data. A file identifier is also assigned to the EF. The file identifier assigned to the EF is determined to be unique within the DF.

EF is classified into two types, ie, IEF (Internal Elementary File) and WEF (Working Basic File).
The IEF is a file in which key data for security is stored. The IEF is a file that cannot be output from the IC card 100 to the outside for security, and is used only inside the IC card 100.
The WEF is a file that can be output from the IC card 100 to the outside. The WEF stores, for example, general data such as information on points given to the user.

In the example of the figure, a mode in which DF1 and DF2 are placed immediately below the MF is shown. The DF1 stores a file as the first point service application data APD1. The DF2 stores a file as the first point service application data APD1.
In the figure, DF1 stores WEF1 and IEF1 as files of first point service application data APD1.
DF2 stores WEF2 and IEF2 as files of the second point service application data APD2.

Here, 0001 is assigned as a file identifier (FID) to DF1. The file identifier of 0001 also functions as an application identifier that uniquely indicates the first point service application.
The first point service application program selects DF1 to which 0001 which is an application identifier corresponding to itself is assigned, and executes processing using EF (WEF1, IEF1) in the selected DF1.

Also, 0002 is assigned as a file identifier (FID) to DF2. The 0002 file identifier also functions as an application identifier that uniquely indicates the second point service application.
The second point service application program selects DF2 to which 0002, which is an application identifier corresponding to itself, is assigned, and executes processing using EF (WEF2, IEF2) in the selected DF2.

  As understood from FIGS. 1 and 2, in order to mount a plurality of applications on the IC card, a plurality of application programs and a plurality of application data corresponding to the plurality of applications are stored in the storage medium 103. In addition, each of the application programs selects a DF to which a file identifier corresponding to its own application identifier is assigned, and processes a file stored in the selected DF. In this manner, a plurality of applications can be selectively operated on the IC card.

Here, a case will be described as an example in which the first point service application and the second point service application are configured to perform control related to each point under a common specification.
In such a case, for example, the application program corresponding to each of the first point service application and the second point service application has a common content in many parts.
Thus, having a common program content among a plurality of application programs means that a plurality of data with overlapping contents are stored in the IC card. Such a state increases the amount of data stored in the storage medium in the IC card, and can be regarded as hindering efficient use of the storage capacity of the storage medium. From this point of view, it is preferable that the storage capacity of the storage medium of the IC card can be efficiently used by sharing data having the same application program content between the applications.

<First Embodiment>
[Storage Mode Example of Storage Medium]
Therefore, in the present embodiment, the IC card (an example of a storage medium device) is configured as described below, so that the storage capacity of the storage medium 103 is used efficiently.
FIG. 3 shows an example of the data structure of the storage medium 103 when a plurality of applications are mounted on the IC card in this embodiment. In this figure, the same parts as those in FIG. In addition, the figure shows an example in which the first point service application and the second point service application are mounted on the IC card, as in the case of FIG.

  The storage medium 103 shown in the figure has a program area 131 and an application data area 132 formed as in FIG. In addition, in the present embodiment, the common application program PRG is stored in the program area 131.

The common application program PRG is a common application program that can selectively realize either the operation as the first point service application or the operation as the first point service application.
Therefore, the common application program PRG includes a program content for realizing the operation as the first point service application and a program content for realizing the operation as the second point service application.
In addition, the common application program PRG has a common structure for portions of the program content that overlap between the first point service application and the second point service application.

Specifically, the common application program PRG includes a common program part pt10, a first difference program part pt11, and a second difference program part pt12.
The common program part pt10 is a part of the program content that overlaps between the first point service application and the second point service application in the common application program PRG.
The first difference program part pt11 is a part of the program content corresponding to the first point service application other than the common program part pt10.
The second difference program part pt12 is a part of the program content corresponding to the second point service application other than the common program part pt10.

The application data area 132 is provided with common application data CAPD corresponding to the common application program PRG.
In addition, in the common application data CAPD, first point service application data APD1 and second point service application data APD2 are provided.
The first point service application data APD1 is data used by the first point service application. The second point service application data APD2 is data used by the second point service application.

When the first point service application is selected, the common program part pt10 and the first difference program part pt11 in the common application program PRG are executed. Then, the first point service application data APD1 is appropriately processed under the state where the common program part pt10 and the first difference program part pt11 are executed. Thereby, the operation of the first point service application is realized.
Further, when the second point service application is selected, the common program part pt10 and the second difference program part pt12 in the common application program PRG are executed. Then, the second point service application data APD2 is appropriately processed under the state where the common program part pt10 and the second difference program part pt12 are executed. Thereby, the operation of the second point service application is realized.

FIG. 4 shows an example of the file structure of the storage medium 103 corresponding to the data structure of FIG.
In the example shown in the figure, DF1 is arranged immediately below the MF. In this case, the DF1 stores files belonging to the common application data CAPD.
That is, immediately below DF1, files WEF1 and IEF1 belonging to the first point service application data APD1 and files WEF2 and IEF2 belonging to the second point service application data APD2 are placed.

  In this embodiment, 0001 which is a file identifier (FID) of DF1 is also an application identifier for identifying a common application corresponding to the common application program PRG. The common application that operates on the IC card by executing the common application program PRG reads the file stored in DF1.

In the present embodiment, the application selection information IAP is included in the directory information DIR corresponding to DF1.
The directory information is provided for each file (DF or EF) and is one of file management information for managing the corresponding file. The directory information stores information indicating predetermined attributes and the like for the corresponding file. The directory information and the file indicated by the directory information are associated by a file identifier (FID) assigned to the file. That is, the directory information specifies a corresponding file by a file identifier (FID).
The application selection information IAP is information indicating an application selected from two applications of the first point service application and the second point service application.

In the present embodiment, the application selection information IAP is updated according to the selection of an application by a reader / writer that is an external communication device that performs communication with the IC card.
That is, if the first point service application is selected by the reader / writer, the application selection information IAP is updated to indicate the first point service application. On the other hand, if the second point service application is selected by the reader / writer, the application selection information IAP is updated to indicate the second point service application.

The common application that operates by executing the common application program PRG refers to the application selection information when reading the file from the common application data CAPD.
If the referenced application selection information indicates the first point service application, the common application executes the following processing according to the program by the common program part pt10 and the first difference program part pt11. That is, the common application reads a necessary file from the files (WEF1, IEF1) belonging to the first point service application data APD1 below the DF1, and executes processing of the read file. In this case, the function as the first point service application is obtained in the IC card.
On the other hand, if the referenced application selection information indicates the second point service application, the common application executes the following process according to the program by the common program part pt10 and the second difference program part pt12. That is, the common application reads a necessary file from the files (WEF2, IEF2) belonging to the second point service application data APD2 below the DF1, and executes processing of the read file. In this case, the function as the second point service application is obtained in the IC card.

As a specific example, WEF1 may be a file in which data indicating accumulated points given under the first point service is stored. Further, the IEF 1 may be a file that stores a key used when the reader / writer 200 executes an authentication process for determining whether the reader / writer 200 corresponds to a user who can use the first point service.
Similarly, WEF2 may be a file in which data indicating accumulated points given under the second point service is stored. Further, the IEF 2 may be a file that stores a key used when the reader / writer 200 executes an authentication process for determining whether the reader / writer 200 corresponds to a user who can use the second point service.

As described above, the IC card according to the present embodiment can be operated by switching two applications of the first point service application and the second point service application on the IC card by one common application program PRG. .
In the figure, an example is shown in which one WEF and IEF are stored corresponding to each of the first point service application and the second point service application. The number of files to be stored is not particularly limited.

As can be understood from the above description, in the present embodiment, one common application is applied to the two first point service applications and the second point service application. For example, an application identifier corresponding to a file identifier (FID) of 0001 is assigned to the common application, and the file stored in DF1 indicated by the file identifier (FID) of 0001 is used as the common application data CAPD.
In addition, the common application data CAPD has a structure for storing a file belonging to the first point service application data APD1 and a file belonging to the second point service application data APD2.
Application selection information is provided corresponding to DF1. The application selection information indicates which of the first point service application and the second point service application should be selected. Therefore, the common application can specify and read a file belonging to the application data of the application indicated by the application selection information from among the files under the DF1 hierarchy.
In this way, the IC card in the present embodiment can be switched in function between the first point service application and the second point service application by one common application program PRG.

Here, the common application program PRG is not simply a combination of programs corresponding to the first point service application and the second point service application. That is, as described above, the common application program PRG is shared as the common program part pt10 with respect to the program contents common to the first point service application and the second point service application.
Thereby, while the functions of both the first point service application and the second point service application can be switched, the data size of the program to be stored in the program area 131 can be made smaller than in the case of FIG. As a result, the capacity used in the storage medium 103 can be saved and the storage capacity of the storage medium 103 can be used efficiently.

[Configuration example of IC card]
Next, a configuration example of the IC card of this embodiment will be described with reference to FIG. In the drawing, a reader / writer 200 that is an external communication device that communicates with the IC card 100 is shown to a friend.
The IC card 100 shown in the figure includes a communication unit 101, a control unit 102, and a storage medium 103.
The communication unit 101 communicates with an external communication device such as the reader / writer 200. Communication with the reader / writer 200 by the communication unit 101 may be a contact type or a non-contact type.

The control unit 102 executes various controls in the IC card 100. The function of the control unit 102 is realized by, for example, a CPU (Central Processing Unit) provided in the control unit 102 executing a program stored in the storage medium 103.
The control unit 102 of this embodiment includes an application switching control unit 121 and an application execution unit 122 as functional units corresponding to a common application that operates by executing the common application program PRG.

The application switching control unit 121 updates the application selection information IAP (FIG. 4) so that the application selected by the reader / writer 200 is indicated.
The application execution unit 122 executes processing using application data corresponding to the application indicated by the application selection information.

The storage medium 103 stores various information used by the control unit 102. The storage medium 103 stores the application program and application data according to the data structure and file structure shown in FIGS. The storage medium 103 may store programs, data, and files other than those shown in FIGS. For example, the storage medium 103 also stores OS (Operating System) data for processing an application program as a program.
As the storage medium 103, for example, a nonvolatile memory such as a ROM (Read Only Memory), an EEPROM (Electrically Erasable Programmable Read-Only Memory), a flash memory, or the like can be applied.

[Example of processing procedure]
With reference to the flowchart of FIG. 6, an example of a processing procedure executed by the IC card 100 and the reader / writer 200 in the present embodiment will be described.
First, an example of a processing procedure executed by the reader / writer 200 will be described. In this case, the reader / writer 200 executes processing related to points, such as point granting, corresponding to one of the first point service application and the second point service application.

The reader / writer 200 transmits, to the IC card 100, an application selection command for instructing selection of an application to be operated on the IC card 100 from the first point service application and the second point service application (step S101).
In correspondence with the examples of FIGS. 3 and 4, the reader / writer 200 transmits an application selection command for designating one of the first point service application and the second point service application.

Next, the reader / writer 200 receives the application selection response transmitted by the IC card 100 in response to the application selection command transmitted in step S101 (step S102).
The application selection response is a response (response) indicating whether or not the application specified by the application selection command in the IC card 100 can be selected.

If the application selection response indicates that the designated application can be selected, the reader / writer 200 transmits an authentication command to the IC card 100 (step S103).
The authentication command transmitted in step S103 instructs the IC card 100 to execute an authentication process as to whether or not the application selection command transmitted in step S101 is a valid reader / writer corresponding to the application instructing selection. It is a command.
Although illustration is omitted, if the application selection response received in step S102 indicates that application selection is not possible, the reader / writer 200 stops the subsequent processing and performs processing such as error notification. Just do it.

The reader / writer 200 receives the authentication response transmitted by the IC card 100 in response to the authentication command transmitted in step S103 (step S104). The authentication response is a response indicating whether or not authentication has been established as a result of the authentication process executed by the IC card.
If the authentication response received in step S104 indicates that authentication has been established, the reader / writer 200 transmits a predetermined command defined under the application that has specified selection in step S101 according to a predetermined procedure ( Step S105).
Although illustration is omitted, if the authentication response received in step S104 indicates that authentication is not established, the reader / writer 200 may stop the subsequent processing and execute processing such as error notification.

  The reader / writer 200 receives a response (command response) to the command transmitted in step S105 from the IC card 100 (step S106). The command response received in step S106 indicates the result of processing (response processing) executed by the IC card in response to the command transmitted in step S105. Based on the content of the command response received in step S106, the reader / writer 200 can determine a process to be executed later, for example.

Next, an example of a processing procedure executed by the IC card 100 will be described with reference to the same FIG.
In the IC card 100, the communication unit 101 receives the application selection command transmitted from the reader / writer 200 in step S101 (step S201).
Next, the application switching control unit 121 in the control unit 102 determines whether or not the application specified by the application selection command received in step S201 can be selected (step S202).

If the application specified by the application selection command is mounted, it is determined in step S202 that the application can be selected. On the other hand, if the application specified by the application selection command is not installed, it is determined in step S202 that the application cannot be selected.
The determination as to whether or not the application specified by the application selection command is installed can be performed as follows, for example.
That is, in the example of FIGS. 3 and 4, an application identifier is assigned to each of the first point service application and the second point service application separately from the common application. In addition, the application identifiers of the first point service application and the second point service application are stored in the directory information DIR of DF1, for example, as an application list indicating applications that can operate on the IC card. For the application selection command, an application is specified by an application identifier.
Then, the application switching control unit 121 determines whether or not the application identifier indicated by the application selection command is included in the application list. If the application identifier indicated by the application selection command is included in the application list, the application switching control unit 121 may determine that the application specified by the application selection command is installed. On the other hand, if the application identifier indicated by the application selection command is not included in the application list, the application switching control unit 121 may determine that the application specified by the application selection command is not installed.

  The application switching control unit 121 transmits an application selection response indicating the determination result of step S202 to the reader / writer 200 (step S203).

  As described above, the reader / writer 200 transmits an authentication command in response to receiving an application selection response indicating that the specified application can be selected. The transmitted authentication command is received by the communication unit 101 (step S204).

In response to the reception of the authentication command in step S204, the application switching control unit 121 executes an authentication process using the key corresponding to the designated application that is determined to be selectable in step S202. (Step S205).
In the present embodiment, the key corresponding to the designated application is data of one file among files as application data corresponding to the designated application.
As a specific example in correspondence with FIG. 4, when the first point service application is a designated application, IEF1 belonging to the first point service application data APD1 is a key corresponding to the designated application.
If the second point service application is a designated application, IEF2 belonging to the second point service application data APD2 is a key corresponding to the designated application.

  In step S205, the application switching control unit 121 reads a key file from files belonging to application data corresponding to the application determined to be selectable in step S202. Then, the application switching control unit 121 executes an authentication process using the read key and the authentication information included in the authentication command received in step S204.

When the authentication is established by the authentication process in step S205, the application switching control unit 121 updates the application selection information IAP so as to indicate the application determined to be selectable in step S202 (step S206).
As described with reference to FIG. 4, the application selection information IAP of this embodiment is included in the DF directory information DIR corresponding to the common application. In step S206, the application switching control unit 121 accesses the DF directory information corresponding to the common application, and updates the application selection information IAP included in the directory information.

Then, the application switching control unit 121 transmits an authentication response indicating the authentication result of the authentication process in step S205 to the reader / writer 200 (step S207).
If the authentication is not established as a result of the authentication process in step S205, the application switching control unit 121 skips the process in step S206 and sends an authentication response indicating that the authentication is not established in step S207. Just send it.

  When the authentication response transmitted in step S207 indicates that authentication has been established, a command defined in the designated application is transmitted from the reader / writer 200 in step S105. Thus, the command transmitted from the reader / writer 200 is received by the communication unit 101 (step S208).

In response to receiving the command in step S208, the application execution unit 122 refers to the application selection information IAP (step S209). At this time, the application execution unit 122 accesses the DF directory information corresponding to the common application, and reads the application selection information IAP included in the directory information.
By referring to the application selection information IAP, the application execution unit 122 can recognize whether the currently selected application is, for example, a first point service application or a second point service application.

Therefore, the application execution unit 122 executes processing in response to the command received in step S208 under the application indicated by the application selection information IAP (step S210).
In this case, when application data is used as processing in response to the command, the application execution unit 122 acquires application data as follows. That is, the application execution unit 122 selects application data corresponding to the application indicated by the application selection information IAP from among application data included in the common application data CAPD. The application execution unit 122 reads a file necessary for the current process from the files belonging to the application data to be selected. In this way, the application execution unit 122 acquires a file as necessary application data in step S208, and processes the acquired file.
Then, the application execution unit 122 transmits a command response indicating the processing result in step S210 to the reader / writer 200 (step S211).

Note that the reader / writer 200 may repeatedly execute transmission of a predetermined command as step S105 and reception of a command response as step S106 according to a procedure of processing executed under a corresponding application.
Along with this, the processing of steps S208 to S211 in the IC card 100 may be repeatedly executed.

  In this manner, in the present embodiment, any one of a plurality of applications can be caused to function, and processing according to a predetermined procedure can be executed between the reader / writer 200 and the IC card 100.

Second Embodiment
Next, the second embodiment will be described. FIG. 7 shows a file structure example of the storage medium 103 in the second embodiment. 4 corresponds to an example in which the first point service application and the second point service application are mounted on the IC card 100, as in FIG. In the figure, the same parts as those in FIG.

As shown in the figure, the application selection information in this embodiment is provided as one of the files belonging to the common application data CAPD. Specifically, the application selection information of this embodiment is provided as WEF3 included in the common application data CAPD.
In this case, it is not necessary to include the application selection information IAP in the directory information DIR corresponding to DF1.

In order to update the application selection information in step S206 in FIG. 6, the application switching control unit 121 according to the present embodiment accesses the WEF 3 and rewrites data stored in the WEF 3.
Further, the application execution unit 122 according to the present embodiment may access the WEF 3 in order to refer to the application selection information in step S209 in FIG.

<Third Embodiment>
Subsequently, the third embodiment will be described. FIG. 8 shows a file structure example of the storage medium 103 in the third embodiment. 4 corresponds to an example in which the first point service application and the second point service application are mounted on the IC card 100, as in FIG. In the figure, the same parts as those in FIG.

As shown in FIG. 8, in the present embodiment, a WEF4 that is a shared file is provided as a file belonging to the common application data CAPD.
The shared file is a file that stores data shared between the first point service application and the second point service application.
That is, when the application selection information indicates the first point service application, the application execution unit 122 can process WEF4 as well as WEF1, IEF1, and the like included in the first point service application data APD1.
In addition, when the application selection information indicates the first point service application, the application execution unit 122 can process WEF4 together with WEF2, IEF2, and the like included in the second point service application data APD2.

For example, a case will be described as an example in which there is data with overlapping contents in the first point service application and the second point service application. In this case, data files having overlapping contents can be individually stored in the first point service application data APD1 and the second point service application data APD2. However, in this case, two files having the same contents are stored in the storage medium 103.
Therefore, if data with contents overlapping each other is provided as a shared file as in this embodiment, the data with contents overlapping with each other in the first point service application and the second point service application are shared. can do. As a result, it is possible to further promote the efficient use of the storage capacity of the storage medium 103.
In the figure, only one WEF 4 is shown as a shared file, but a plurality of shared files may be provided.

<Fourth embodiment>
Next, a fourth embodiment will be described. In the fourth embodiment, the plurality of applications that function under the common application are a first credit card function application and a second credit card function application.
The first credit card function application is an application that provides a function of a credit card in the name of user A corresponding to a specific credit card company. On the other hand, the second credit card function application is an application that provides the function of the credit card in the name of user B, for example, although the first credit card function application and the credit card company are the same. Such an IC card can be used when, for example, one IC card is desired to be used as a credit card with a plurality of names corresponding to a plurality of persons in a family or the like.

FIG. 9 shows an example of the data structure of the storage medium 103 in the IC card 100 in which the first credit card function application and the second credit card function application are mounted as described above. In the figure, the same parts as those in FIG.
As shown in the figure, common application data CAPD corresponding to the common application program PRG is provided in the application data area 132 as in FIG.
In addition, in the common application data CAPD in this embodiment, first credit card function application data APD11 and second credit card function application data APD12 are provided.

  In the case of the common application program PRG of the present embodiment, the first difference program part pt11 is a part of the program content corresponding to the first credit card function application other than the common program part pt10. The second difference program part pt12 is a part of the program content corresponding to the second credit card function application other than the common program part pt10.

When the first credit card function application is selected, the common program unit pt10 and the first difference program unit pt11 are executed in the common application program PRG. Then, the first credit card function application data APD11 is used under the state where the common program part pt10 and the first difference program part pt11 are executed. In this way, the function as the first point service application is obtained.
Further, when the second credit card function application is selected, the common program part pt10 and the second difference program part pt12 are executed in the common application program PRG. Then, the second credit card function application data APD12 is used under the state where the common program part pt10 and the second difference program part pt12 are executed. In this way, the function as the second point service application is obtained.

FIG. 10 shows a file structure of the storage medium 103 corresponding to the data structure shown in FIG. In this figure, the same parts as those in FIG.
As shown in the figure, a file as common application data CAPD is stored in DF1. The file stored in DF1 is divided into a file belonging to the first credit card function application data APD11 and a file belonging to the second credit card function application data APD12.
The files belonging to the first credit card function application data APD11 are WEF11 and IEF11. The files belonging to the second credit card function application data APD12 are WEF12 and IEF12.

  The application selection information IAP in the present embodiment indicates one of the first credit card function application and the second credit card function application as the selected application.

In the present embodiment, a common application that operates by executing the common application program PRG refers to application selection information when reading a file from the common application data CAPD.
If the referenced application selection information indicates the first credit card function application, the common application executes the following processing according to the program by the common program unit pt10 and the first difference program unit pt11. That is, the common application reads a necessary file from the files (WEF11, IEF11) included in the first credit card function application data APD11 below the DF1, and executes the processing of the read file. In this case, the function as the first credit card function application is obtained in the IC card.
On the other hand, if the referenced application selection information indicates the second credit card function application, the common application executes the following processing according to the program by the common program unit pt10 and the second difference program unit pt12. That is, the common application reads a necessary file from the files (WEF12, IEF12) included in the second credit card function application data APD12 below the DF1, and executes processing of the read file. In the IC card in this case, a function as a second credit card function application is obtained.

  In this manner, the IC card of the present embodiment is operated by switching the functions of the two applications of the first credit card function application and the second credit card function application on the IC card by one common application program PRG. be able to.

  In the embodiments so far, the point service application or the credit card function application has been exemplified as the plurality of applications that can be switched under the common application. However, the plurality of applications that can be switched under the common application is not particularly limited.

  A program for realizing the functions of the above-described IC card 100 or reader / writer 200 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed. Processing as the above-described IC card 100 or reader / writer 200 may be performed. Here, “loading and executing a program recorded on a recording medium into a computer system” includes installing the program in the computer system. The “computer system” here includes an OS and hardware such as peripheral devices. Further, the “computer system” may include a plurality of computer devices connected via a network including a communication line such as the Internet, WAN, LAN, and dedicated line. The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. As described above, the recording medium storing the program may be a non-transitory recording medium such as a CD-ROM. The recording medium also includes a recording medium provided inside or outside that is accessible from the distribution server in order to distribute the program. The code of the program stored in the recording medium of the distribution server may be different from the code of the program that can be executed by the terminal device. That is, the format stored in the distribution server is not limited as long as it can be downloaded from the distribution server and installed in a form that can be executed by the terminal device. Note that the program may be divided into a plurality of parts, downloaded at different timings, and combined in the terminal device, or the distribution server that distributes each of the divided programs may be different. Furthermore, the “computer-readable recording medium” holds a program for a certain period of time, such as a volatile memory (RAM) inside a computer system that becomes a server or a client when the program is transmitted via a network. Including things. The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, what is called a difference file (difference program) may be sufficient.

100 IC card, 101 communication unit, 102 control unit, 103 storage medium, 121 application switching control unit, 122 application execution unit, 131 program area, 132 application data area, 200 reader / writer

Claims (6)

Application data for each of a plurality of applications functioning under one common application is stored so as to be stored in the same data storage location, and application selection information indicating an application selected from the plurality of applications is stored. A storage medium to
A communication unit that communicates with an external communication device;
An application switching control unit that updates the application selection information so that the application selected by the external communication device is indicated;
A storage medium device comprising: an application execution unit that executes processing using application data corresponding to an application indicated by the application selection information. The application switching control unit
The storage medium device according to claim 1, wherein the application selection information is updated so that an application corresponding to application data including a key for which an authentication process with the external communication device has been established is indicated. The storage medium is
3. The storage medium device according to claim 1, wherein the storage medium device stores the shared file storing data shared among the plurality of applications in the one data storage position. The storage medium device according to any one of claims 1 to 3, wherein the application selection information is stored in file management information for managing a file as the one data storage location. The storage medium device according to any one of claims 1 to 3, wherein the application selection information is one file stored in the one data storage location. Application data for each of a plurality of applications functioning under one common application is stored so as to be stored in the same data storage location, and application selection information indicating an application selected from the plurality of applications is stored. An application execution method in a storage medium device comprising the storage medium
A communication unit communicating with an external communication device;
An application switching control unit updating the application selection information so that the application selected by the external communication device is indicated;
An application execution method including a step of executing a process using application data corresponding to an application indicated by the application selection information under the common application program.

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