JP6499052B2 - IC card, IC module, and program - Google Patents

Description

  Embodiments described herein relate generally to an IC card, an IC module, and a program.

  In recent years, IC cards incorporating IC (Integrated Circuit) chips have been widely used. In the IC card, an issue process is executed in which information necessary for the operation of the IC card corresponding to the application is written into the nonvolatile memory in the IC chip using an issue command including a write request command. However, in the conventional IC card, for example, when the written information is confirmed, it is necessary to use a read command different from the issued command, and there are cases where the types of commands supported by the issuing device increase.

JP 2011-2160868 A

  The problem to be solved by the present invention is to provide an IC card, an IC module, and a program capable of reducing the types of commands used in the issuing process.

  The IC card according to the embodiment includes a data storage unit, a reception unit, a data identifier storage unit, a processing unit, and a transmission unit. The data storage unit stores data. The receiving unit receives a write request including data to be stored in the data storage unit and a data identifier for identifying the data from an external device. The data identifier storage unit stores information related to the data identifier corresponding to the data stored in the data storage unit. The processing unit determines whether data corresponding to the data identifier received by the receiving unit is stored in the data storage unit based on information related to the data identifier stored in the data identifier storage unit When the data corresponding to the data identifier is not stored in the data storage unit, the data included in the write request is stored in the data storage unit, and the data corresponding to the data identifier is stored in the data storage unit. Is stored in the data request, it is determined whether the data included in the write request matches the data corresponding to the data identifier stored in the data storage unit. The transmission unit transmits a response including information indicating a determination result of whether or not the determination is made by the processing unit to the external device.

1 is an external view showing an example of an IC card according to a first embodiment. 1 is a diagram illustrating a hardware configuration example of an IC card according to a first embodiment. The block diagram which shows the function structural example of the IC card of 1st Embodiment. The figure which shows the example of data which the past reception DGI memory | storage part of 1st Embodiment memorize | stores. The figure which shows the example of data which the DGI table memory | storage part of 1st Embodiment memorize | stores. The figure which shows the example of data which the file management information storage part of 1st Embodiment memorize | stores. The figure which shows the data structural example of a STORE DATA command. 5 is a flowchart illustrating an example of a STORE DATA command process of the IC card according to the first embodiment. The block diagram which shows the function structural example of the IC card of 2nd Embodiment. The figure which shows the example of data which the file management information storage part of 2nd Embodiment memorize | stores. 9 is a flowchart illustrating an example of a STORE DATA command process of the IC card according to the second embodiment.

  Hereinafter, an IC card, an IC module, and a program according to embodiments will be described with reference to the drawings.

(First embodiment)
FIG. 1 is an external view showing an example of an IC card 1 according to the first embodiment.
As shown in FIG. 1, the IC card 1 includes an IC module 10. The IC module 10 includes a contact portion 3 and an IC chip 100 when the IC card 1 is a contact IC card. When the IC card 1 is a non-contact IC card, the IC module 10 includes an antenna unit and an IC chip 100. The IC card 1 is formed, for example, by mounting an IC module 10 on a plastic card base PT (an example of a card body). That is, the IC card 1 includes an IC module 10 and a card substrate PT in which the IC module 10 is embedded. Further, the IC card 1 can communicate with the external device 2 via the contact unit 3.

For example, the IC card 1 receives a command (processing request) transmitted from the external device 2 via the contact unit 3 and executes processing (command processing) according to the received command. Then, the IC card 1 transmits a response (processing response) that is an execution result of the command processing to the external device 2 via the contact unit 3.
Here, the external device 2 is a higher-level device that communicates with the IC card 1, and is, for example, a reader / writer device or an issuing device.

  The IC module 10 includes a contact portion 3 and an IC chip 100, and is a module that is traded in a form such as COT (Chip On Tape) in which a plurality of IC modules 10 are arranged on a tape, for example. Note that the single IC module 10 that has been cut out and separated from the tape may be referred to as COT.

The contact part 3 has terminals for various signals necessary for the operation of the IC card 1. Here, the various signal terminals include a terminal for receiving a power supply voltage, a clock signal, a reset signal, and the like from the external device 2 and a serial data input / output terminal (SIO terminal) for communicating with the external device 2. .
The IC chip 100 is, for example, an LSI (Large Scale Integration) such as a one-chip microprocessor.

Next, the hardware configuration of the IC card 1 of this embodiment will be described with reference to FIG.
FIG. 2 is a diagram illustrating a hardware configuration example of the IC card 1 according to the present embodiment.
As shown in FIG. 2, the IC card 1 includes an IC module 10 including a contact portion 3 and an IC chip 100. The IC chip 100 includes a UART (Universal Asynchronous Receiver Transmitter) 4, a CPU (Central Processing Unit) 5, a ROM (Read Only Memory) 6, a RAM (Random Access Memory) 7, and an EEPROM (Electrically Erasable Programmable ROM). ) 8.

  The UART 4 (an example of a communication unit) performs communication (transmission / reception of commands / responses) between the IC card 1 and the external device 2. The UART 4 receives various commands from the external device 2 such as an issue command (issue request) for requesting an issue process for setting personal information, internal control information, and the like in the EEPROM 8. In addition, the UART 4 transmits a response that is a result of execution of processing according to various commands to the external device 2.

  The CPU 5 executes programs stored in the ROM 6 or the EEPROM 8 to perform various processes of the IC card 1. For example, the CPU 5 executes command processing according to the command received by the UART 4 via the contact unit 3. Further, the CPU 5 causes the UART 4 to transmit a response of the executed command processing.

The ROM 6 is a non-volatile memory such as a mask ROM, for example, and stores a program for executing various processes of the IC card 1 and data such as a command table.
The RAM 7 is a volatile memory such as SRAM (Static RAM), for example, and temporarily stores data used when performing various processes of the IC card 1. The RAM 7 includes a reception buffer 71 and a transmission buffer 72.
The reception buffer 71 stores data such as commands received by the UART 4. Further, the transmission buffer 72 stores data such as a response transmitted by the UART 4.

  The EEPROM 8 is, for example, an electrically rewritable nonvolatile memory. The EEPROM 8 stores various data used by the IC card 1. The EEPROM 8 stores, for example, a user name, a user ID, a card ID, various key information, information for internal control, and the like according to the use of the IC card 1.

Next, a functional configuration example of the IC card 1 according to the present embodiment will be described with reference to FIG.
FIG. 3 is a block diagram showing a functional configuration example of the IC card 1 of the present embodiment.
As shown in FIG. 3, the IC card 1 includes a UART 4, a control unit 50, a DGI table storage unit 60, a past received DGI storage unit 70, a data storage unit 80, and a file management information storage unit 81. ing.
Here, each part of the IC card 1 shown in FIG. 3 is realized by using the hardware of the IC card 1 shown in FIG.

  The past received DGI storage unit 70 is constituted by, for example, the RAM 7 and stores a DGI (Data Grouping Identifier) corresponding to data already stored in the data storage unit 80. Here, the DGI is a data identifier that identifies data to be stored in the data storage unit 80. The past received DGI storage unit 70 is an example of a data identifier storage unit that stores information related to DGI corresponding to data already stored in the data storage unit 80. The information related to DGI includes DGI. The past received DGI storage unit 70 stores, for example, a DGI in which a STORE DATA command (write request) for writing (storing) data in the data storage unit 80 has already been executed, as shown in FIG. The STORE DATA command is an example of an issue command, and details will be described later.

FIG. 4 is a diagram illustrating an example of data stored in the past reception DGI storage unit 70 of the present embodiment.
As illustrated in FIG. 4, the past received DGI storage unit 70 stores “past received DGI”. Here, the “past received DGI” is the DGI included in the already executed STORE DATA command, for example, the DGI received in the past via the UART 4. That is, the past received DGI storage unit 70 stores a list of DGI received in the past.
In the example illustrated in FIG. 4, the past received DGI storage unit 70 stores “0x0101”, “0x0201”,... As “past received DGI”. That is, the STORE DATA command has already been executed for the data whose DGI is “0x0101,” “0x0201,”..., And the data corresponding to the past received DGI has already been stored in the data storage unit 80. Indicates that it is remembered. Here, “0x” at the beginning of the data indicates that it is expressed in hexadecimal (hexadecimal).

  Returning to the description of FIG. 3, the data storage unit 80 is configured by, for example, the EEPROM 8 and stores various data according to the use of the IC card 1. The data storage unit 80 is constructed (secured) by issuing an IC card 1 and DF (Dedicated File) corresponding to the application and EF (Elementary File) storing various data used in the application and data for internal control. ) For example, in the issuing process, data is stored in each EF of the data storage unit 80 by a STORE DATA command.

The DGI table storage unit 60 includes, for example, the ROM 6 and stores a DGI table in which “DGI” and “file identifier” are associated with each other as shown in FIG. The “file identifier” is identification information for identifying a file (for example, EF) stored in the data storage unit 80.
FIG. 5 is a diagram illustrating an example of data stored in the DGI table storage unit 60 of the present embodiment.
The example shown in FIG. 5 indicates that data corresponding to “DGI” “0x0101” is stored in the EF having “file identifier” “0x0001”. In addition, data corresponding to “0x0201” in “DGI” is stored in the EF having “0x0002” in “file identifier”. In addition, data corresponding to “DGI” “0x0301” is stored in the EF having “file identifier” “0x0003”.

  Returning to FIG. 3 again, the file management information storage unit 81 includes, for example, the EEPROM 8 and stores “file identifier” and “first address of the file storage destination EEPROM 8” in association with each other as shown in FIG. To do. That is, the file management information storage unit 81 stores the EF and the start address of the EEPROM 8 corresponding to the EF in association with each other. For example, when the EF is created (constructed), the “file identifier” for the created EF and the “first address of the EEPROM 8 as the file storage destination” are added to the file management information storage unit 81. Is memorized.

FIG. 6 is a diagram illustrating an example of data stored in the file management information storage unit 81 of the present embodiment.
In the example shown in FIG. 6, an EF with a “file identifier” of “0x0001” indicates that the “start address of the file storage destination EEPROM 8” is “0x805000”. An EF with a “file identifier” of “0x0002” indicates that the “head address of the file storage destination EEPROM 8” is “0x804F00”.

  Returning to FIG. 3 again, the control unit 50 is realized by, for example, the CPU 5, the RAM 7, and the ROM 6 or the EEPROM 8, and comprehensively controls the IC card 1. For example, the control unit 50 receives various commands transmitted from the external device 2 to the IC card 1 via the UART 4 and executes processing of the received command (command processing). For example, the control unit 50 outputs a response including the result of the executed command processing to the external device 2 via the UART 4. The control unit 50 includes a reception processing unit 51, a command processing unit 52, and a transmission processing unit 53.

  The reception processing unit 51 (an example of a reception unit) stores a command received by the UART 4 from the external device 2 in the reception buffer 71. For example, the reception processing unit 51 receives a STORE DATA command including data to be stored in the data storage unit 80 and DGI for identifying the data via the UART 4. Here, a data configuration example of the STORE DATA command will be described with reference to FIG.

FIG. 7 is a diagram illustrating a data configuration example of the STORE DATA command.
As shown in this figure, a STORE DATA command (an example of a write request) has a command header and a command body. The command header has “CLA” (class byte), “INS” (instruction byte), “P1” (parameter 1), and “P2” (parameter 2). Each of “CLA”, “INS”, “P1”, and “P2” is composed of 1 byte. The command body has “Lc” (data length) and “DATA” (data). “Lc” is composed of 1 byte, and “DATA” is data having a data length (for example, m bytes) designated by “Lc”.

Further, “DATA” of the STORE DATA command includes “DGI”, “DGI length”, and “DGI DATA”. “DGI” is composed of 2 bytes, and “DGI length” is composed of 1 byte. “DGI DATA” is data having a data length (for example, n bytes) designated by “DGI length”.
For example, in the example shown in FIG. 7, the STORE DATA command is a processing request for storing (writing) a 5-byte data of “DGI DATA” “0x12123345455” with respect to an EF of “DGI” “0x0101”. This shows what to do with card 1. Thus, the STORE DATA command includes data (“DGI DATA”) to be stored in the data storage unit 80 and a data identifier (“DGI”).

  Returning to FIG. 3 again, the command processing unit 52 (an example of a processing unit) executes various command processes in accordance with the command received by the reception processing unit 51. For example, the command processing unit 52 acquires a command stored in the reception buffer 71 and executes various command processes according to the command. For example, when the command processing unit 52 acquires a STORE DATA command, the command processing unit 52 receives the past processing DGI storage unit 70 based on “past reception DGI” (an example of information related to DGI). It is determined whether or not data corresponding to the DGI is already stored in the data storage unit 80.

  For example, based on whether or not the DGI included in the STORE DATA command is stored in the past received DGI storage unit 70, the command processing unit 52 has already stored data corresponding to the DGI in the data storage unit 80. It is determined whether or not. That is, for example, the command processing unit 52 searches for a past reception DGI stored in the past reception DGI storage unit 70 and determines whether there is a past reception DGI that matches the DGI included in the received STORE DATA command. To do. The command processing unit 52 determines that the data corresponding to the DGI is already stored in the data storage unit 80 when the DGI included in the received STORE DATA command is stored in the past received DGI storage unit 70. To do. In addition, when the DGI included in the received STORE DATA command is not stored in the past received DGI storage unit 70, the command processing unit 52 determines that the data corresponding to the DGI is not stored in the data storage unit 80. judge.

When the data corresponding to the received DGI is not stored in the data storage unit 80, the command processing unit 52 stores (writes) the data included in the STORE DATA command in the data storage unit 80. That is, the command processing unit 52 stores the received data in the EF corresponding to the DGI in the data storage unit 80. In this case, for example, the command processing unit 52 refers to the DGI table storage unit 60 and acquires the file identifier of the EF corresponding to the DGI from the DGI table storage unit 60. Further, the command processing unit 52 refers to the file management information storage unit 81 and acquires the start address of the EEPROM 8 corresponding to the acquired file identifier from the file management information storage unit 81. The command processing unit 52 stores the received data in order from the start address of the acquired EEPROM 8. That is, the command processing unit 52 stores the received data in the data area (EF) corresponding to the DGI in the data storage unit 80.
Further, when the data included in the STORE DATA command is stored in the data storage unit 80, the command processing unit 52 stores information related to the DGI included in the STORE DATA command in the past reception DGI storage unit 70. For example, the command processing unit 52 adds the received DGI to the list of past received DGIs as shown in FIG.

  In addition, when data corresponding to the received DGI is already stored in the data storage unit 80, the command processing unit 52 stores the data included in the STORE DATA command and the DGI stored in the data storage unit 80. It is determined whether or not the corresponding data matches. In this case, the command processing unit 52 acquires the file identifier of the EF corresponding to the DGI from the DGI table storage unit 60 and corresponds to the file identifier acquired from the file management information storage unit 81, as in the case of the writing described above. The top address of the EEPROM 8 is acquired. The command processing unit 52 determines whether or not the data read from the start address of the acquired EEPROM 8 matches the data included in the STORE DATA command. That is, the command processing unit 52 determines whether or not the received data matches the data stored in the data area (EF) corresponding to the DGI in the data storage unit 80.

  Further, the command processing unit 52 stores a response (response) that is a processing result of the above-described STORE DATA command in the transmission buffer 72, for example. That is, when the received data is stored in the data storage unit 80, the command processing unit 52 generates a response including information indicating that the data writing has been completed, and stores the generated response in the transmission buffer 72. . When comparing the received data with the data stored in the data storage unit 80, the command processing unit 52 compares the data included in the STORE DATA command with the DGI stored in the data storage unit 80. A response including information indicating a determination result of whether or not corresponding data matches is generated. Then, the command processing unit 52 stores the generated response in the transmission buffer 72.

  The transmission processing unit 53 (an example of a transmission unit) outputs a response including the result of the command processing executed by the command processing unit 52 to the external device 2 via the UART 4. For example, the transmission processing unit 53 transmits response data stored in the transmission buffer 72 to the UART 4 and causes the UART 4 to transmit the data to the external device 2. For example, when the received data is compared with the data stored in the data storage unit 80 in the STORE DATA command, the transmission processing unit 53 transmits a response including information indicating the determination result via the UART 4. To do. That is, the transmission processing unit 53 transmits the response including the information indicating the above-described determination result of whether or not the same determined by the command processing unit 52 to the external device 2 via the UART 4. For example, in the case of writing data in the STORE DATA command, the transmission processing unit 53 transmits a response including information indicating that the data writing has been completed to the external device 2 via the UART 4.

Next, the operation of the IC card 1 of the present embodiment will be described with reference to FIG.
FIG. 8 is a flowchart showing an example of the STORE DATA command processing of the IC card 1 of this embodiment.
As shown in FIG. 8, in a state where the external device 2 and the IC card 1 are connected via the contact part 3 and the IC card 1 is activated, the IC card 1 determines whether or not a command has been received. (Step S101). That is, the reception processing unit 51 of the IC card 1 determines whether or not a command is received from the external device 2 via the UART 4. When the reception processing unit 51 receives a command (step S101: YES), the reception processing unit 51 stores the received command in the reception buffer 71, and advances the processing to step S102. Further, when the command is not received (step S101: NO), the reception processing unit 51 returns the process to step S101 and repeats the process of step S101.

  In step S102, the command processing unit 52 of the IC card 1 acquires a command. That is, the command processing unit 52 acquires a command stored in the reception buffer 71.

  Next, the command processing unit 52 determines whether or not the received command is a STORE DATA command (step S103). The command processing unit 52 determines whether the received command is a STORE DATA command based on “CLA” and “INS” of the commands acquired from the reception buffer 71. If the received command is a STORE DATA command (step S103: YES), the command processing unit 52 advances the process to step S104. If the received command is not a STORE DATA command (step S103: NO), the command processing unit 52 advances the process to step S110.

  In step S104, the command processing unit 52 determines whether or not the received DGI is stored in the past received DGI storage unit 70. That is, for example, the command processing unit 52 searches for a past reception DGI stored in the past reception DGI storage unit 70 and determines whether there is a past reception DGI that matches the DGI included in the received STORE DATA command. To do. In the following description, the received DGI may be referred to as “received DGI”. When the received DGI is stored in the past received DGI storage unit 70 (step S104: YES), the command processing unit 52 has already stored “DGI DATA” (see FIG. 7) corresponding to the DGI in the data storage unit 80. And the process proceeds to step S108. In addition, when the received DGI is not stored in the past received DGI storage unit 70 (step S104: NO), the command processing unit 52 still stores “DGI DATA” corresponding to the DGI in the data storage unit 80. If it is not determined, the process proceeds to step S105.

  In step S <b> 105, the command processing unit 52 writes “DGI DATA” (see FIG. 7) included in the STORE DATA command in the EEPROM 8. That is, the command processing unit 52 stores “DGI DATA” in the EF of the data storage unit 80 corresponding to the received DGI. Specifically, the command processing unit 52 refers to the DGI table storage unit 60 and acquires the file identifier of the EF corresponding to the received DGI from the DGI table storage unit 60. Next, the command processing unit 52 refers to the file management information storage unit 81 and acquires the start address of the EEPROM 8 corresponding to the acquired file identifier from the file management information storage unit 81. Then, the command processing unit 52 stores the received data (“DGI DATA”) in order from the start address of the acquired EEPROM 8.

Next, the command processing unit 52 stores the received DGI in the past received DGI storage unit 70 (step S106).
Next, the IC card 1 transmits a response to the external device 2 (step S107). That is, the command processing unit 52 generates a response including information indicating that data writing has been completed and stores the response in the transmission buffer 72. The transmission processing unit 53 of the IC card 1 transmits the response stored in the transmission buffer 72 to the external device 2 via the UART 4. After the process of step S107, the transmission processing unit 53 returns the process to step S101.

  In step S <b> 108, the command processing unit 52 compares “DGI DATA” (see FIG. 7) included in the STORE DATA command with the data stored in the EEPROM 8. That is, the command processing unit 52 compares “DGI DATA” with data stored in the EF of the data storage unit 80 corresponding to the received DGI, and determines whether or not the two data match. Specifically, the command processing unit 52 refers to the DGI table storage unit 60 and acquires the file identifier of the EF corresponding to the received DGI from the DGI table storage unit 60. Next, the command processing unit 52 refers to the file management information storage unit 81 and acquires the start address of the EEPROM 8 corresponding to the acquired file identifier from the file management information storage unit 81. Then, the command processing unit 52 compares the acquired data sequentially read from the top address of the EEPROM 8 with the received data (“DGI DATA”) to determine whether or not the two data match.

  Next, the IC card 1 transmits a response including information indicating the comparison result to the external device 2 (step S109). That is, the command processing unit 52 generates a response including information indicating the above-described comparison result (determination result as to whether or not both data match), and stores the response in the transmission buffer 72. The transmission processing unit 53 transmits the response stored in the transmission buffer 72 to the external device 2 via the UART 4. After the process of step S109, the transmission processing unit 53 returns the process to step S101.

  In step S110, the command processing unit 52 executes other command processing. Here, the other command processing indicates processing of commands corresponding to “CLA” and “INS” other than the STORE DATA command.

  Next, the IC card 1 transmits a response to the external device 2 (step S111). That is, the command processing unit 52 generates a response including the result of command processing and stores it in the transmission buffer 72. The transmission processing unit 53 transmits the response stored in the transmission buffer 72 to the external device 2 via the UART 4. After the process of step S111, the transmission processing unit 53 returns the process to step S101.

  In the flowchart described above, step S101 corresponds to a reception step of receiving via the UART 4 a STORE DATA command including data to be stored in the data storage unit 80 and DGI for identifying the data. Step S104 corresponds to a determination step. In the determination step, the command processing unit 52 determines whether the data corresponding to the DGI received in the reception step is already stored in the data storage unit 80 based on the information related to the DGI stored in the past reception DGI storage unit 70. Determine whether. Steps S105, S106, and S108 correspond to processing steps. In the processing step, the command processing unit 52 stores data included in the STORE DATA command in the data storage unit 80 when data corresponding to DGI is not already stored in the data storage unit 80. In addition, when data corresponding to the DGI is already stored in the data storage unit 80, the command processing unit 52 includes data included in the STORE DATA command and data corresponding to the DGI stored in the data storage unit 80. Is matched. Further, step S109 corresponds to a transmission step of transmitting a response including information indicating a determination result of whether or not they are determined determined in the processing step to the external apparatus 2 via the UART 4.

  In the issuing process, the external device 2 first transmits a STORE DATA command including DGI and data to be written to the IC card 1 and stores the data in the EF corresponding to the DGI in the data storage unit 80. Let Next, the external device 2 transmits a STORE DATA command including the same DGI and data, and confirms whether or not data writing has been normally executed in the previous STORE DATA command.

  As described above, the IC card 1 according to the present embodiment includes the data storage unit 80, the reception processing unit 51 (reception unit), the past reception DGI storage unit 70 (data identifier storage unit), and the command processing unit 52 ( And a transmission processing unit 53 (transmission unit). The data storage unit 80 stores data. The reception processing unit 51 receives a write request (for example, a STORE DATA command) including data to be stored in the data storage unit 80 and a data identifier (for example, DGI) for identifying the data from the external device 2. The past received DGI storage unit 70 stores information related to the DGI corresponding to the data stored in the data storage unit 80 (for example, the past received DGI). The command processing unit 52 determines whether data corresponding to the DGI received by the reception processing unit 51 is stored in the data storage unit 80 based on the past reception DGI stored in the past reception DGI storage unit 70. The command processing unit 52 stores data included in the STORE DATA command in the data storage unit 80 when data corresponding to DGI is not stored in the data storage unit 80. The command processing unit 52 stores the data included in the STORE DATA command and the data storage unit 80 when the data corresponding to the DGI received by the reception processing unit 51 is stored in the data storage unit 80. It is determined whether or not the data corresponding to the received DGI matches. Then, the transmission processing unit 53 transmits to the external device 2 a response (response) including information indicating the determination result of whether or not the determination is made by the command processing unit 52.

  As a result, the IC card 1 according to the present embodiment executes two types of processing, that is, data writing and confirmation of the written data in accordance with the same write request (for example, STORE DATA command). Therefore, the IC card 1 according to the present embodiment does not need to use a read command or the like different from the issued command when confirming written data, and can reduce the types of commands supported by the external device 2. . That is, the IC card 1 according to the present embodiment can reduce the types of commands used in the issuing process.

  In the IC card 1 according to the present embodiment, for example, the command processing unit 52 determines whether the data included in the STORE DATA command matches the data corresponding to the received DGI stored in the data storage unit 80. Determine. Therefore, the IC card 1 according to the present embodiment does not need to read out the secret information to the outside of the IC card 1 when checking whether the secret information such as the key information and the password is normally written. Therefore, the IC card 1 according to the present embodiment can confirm the written data without deteriorating security.

Further, in the present embodiment, when the command processing unit 52 stores the data included in the STORE DATA command in the data storage unit 80, the command processing unit 52 receives information (for example, received DGI) related to the DGI included in the STORE DATA command in the past received DGI. The data is stored in the storage unit 70.
Thereby, the IC card 1 according to the present embodiment determines whether or not the data corresponding to the received DGI is stored in the data storage unit 80 by a simple means of searching the past received DGI storage unit 70, for example. can do.

In the present embodiment, the information related to DGI includes DGI. That is, the past received DGI storage unit 70 stores the DGI as information related to the DGI. The command processing unit 52 determines whether or not data corresponding to the DGI is stored in the data storage unit 80 based on whether or not the DGI included in the STORE DATA command is stored in the past received DGI storage unit 70. judge.
Thereby, in the IC card 1 according to the present embodiment, the data corresponding to the received DGI is stored in the data storage unit 80 by a simpler means whether or not the DGI is stored in the past received DGI storage unit 70. It can be determined whether or not.

In the present embodiment, the past received DGI storage unit 70 is a volatile memory (for example, the RAM 7).
Thereby, the IC card 1 according to the present embodiment can erase the past received DGI stored in the past received DGI storage unit 70 by resetting. Therefore, the IC card 1 according to the present embodiment can erase the past received DGI used in the issuing process, and thus can be used for an application without leaving the influence of the issuing process.

The IC module 10 according to the present embodiment includes the UART 4 (communication unit), the reception processing unit 51 (reception unit), the past received DGI storage unit 70 (data identifier storage unit), and the command processing unit 52 described above. (Processing unit) and a transmission processing unit 53 (transmission unit).
Thereby, the IC module 10 according to this embodiment has the same effect as the IC card 1.

(Second Embodiment)
Next, an IC card according to the second embodiment will be described with reference to the drawings.
In the second embodiment, an example will be described in which it is determined whether data corresponding to the received DGI is already stored in the data storage unit 80 without using the above-described past reception DGI storage unit 70. In the present embodiment, the information related to DGI is information indicating whether data is already stored in the data area corresponding to DGI.

FIG. 9 is a block diagram illustrating a functional configuration example of the IC card 1a according to the second embodiment.
As shown in FIG. 9, the IC card 1a includes a UART 4, a control unit 50a, a DGI table storage unit 60, a data storage unit 80, and a file management information storage unit 81a.
The external view and hardware configuration of the IC card 1a of this embodiment are the same as those of the first embodiment shown in FIGS. 9, the same components as those shown in FIG. 3 are denoted by the same reference numerals, and the description thereof is omitted.

  The file management information storage unit 81a (an example of a data identifier storage unit) is composed of, for example, the EEPROM 8, and as shown in FIG. 10, “file identifier”, “start address of the file storage destination EEPROM 8”, and “write "Completed flag" is stored in association with each other. Here, the “written flag” is information indicating whether data is already stored in the EF (data area) corresponding to the DGI. For example, when the “written flag” is “1”, the data has been written to the EF, and when the “written flag” is “0”, the data has not been written to the EF. As described above, the file management information storage unit 81a stores the EF and the start address of the EEPROM 8 corresponding to the EF in association with each other, and also stores information indicating whether data is already stored. That is, the file management information storage unit 81a stores information indicating whether or not data is already stored in the EF corresponding to the DGI as information related to the DGI. In the file management information storage unit 81a, for example, when the EF is created (constructed), the “file identifier” for the created EF, “the top address of the EEPROM 8 as the file storage destination”, and “0” are stored. A “written flag” is added and stored.

FIG. 10 is a diagram illustrating an example of data stored in the file management information storage unit 81a of the present embodiment.
In the example shown in FIG. 10, the EF whose “file identifier” is “0x0001” indicates that the “start address of the file storage destination EEPROM 8” is “0x805000”. In addition, the EF whose “file identifier” is “0x0001” indicates that the “written flag” is “1” and the data has already been written (STORE DATA command has already been executed). Yes. An EF with a “file identifier” of “0x0003” indicates that the “first address of the file storage destination EEPROM 8” is “0x804A50”. In addition, the EF whose “file identifier” is “0x0003” indicates that the “written flag” is “0” and data has not been written yet (STORE DATA command has not yet been executed). Yes.

Returning to FIG. 9, the control unit 50 a is realized by, for example, the CPU 5, the RAM 7, and the ROM 6 or the EEPROM 8, and comprehensively controls the IC card 1 a. The control unit 50a includes, for example, a reception processing unit 51, a command processing unit 52a, and a transmission processing unit 53.
The basic function of the command processing unit 52a (an example of the processing unit) is the same as that of the command processing unit 52 of the first embodiment, but the method for determining whether or not the STORE DATA command has already been executed is different. . The command processing unit 52a determines that the command processing unit 52 has already received a STORE DATA command for the DGI based on information indicating whether or not data is already stored in the EF corresponding to the DGI (for example, “written flag”). Determine if it is running.

  For example, the command processing unit 52 a first refers to the DGI table storage unit 60 and acquires the file identifier of the EF corresponding to the received DGI from the DGI table storage unit 60. Next, the command processing unit 52a refers to the file management information storage unit 81a and acquires a written flag corresponding to the acquired file identifier from the file management information storage unit 81a. The command processing unit 52a determines that the corresponding data has already been stored in the data storage unit 80 when the acquired written flag is “1”. Further, when the acquired written flag is “0”, the command processing unit 52a determines that the STORE DATA command has not been executed yet. Thus, the command processing unit 52a indicates whether or not data is already stored in the data area (EF) corresponding to the DGI obtained by referring to the file management information storage unit 81a using the received DGI. Based on the information (written flag), it is determined whether or not the data corresponding to the DGI is already stored in the data storage unit 80.

  The command processing unit 52a stores (writes) the data included in the STORE DATA command in the data storage unit 80 when the data corresponding to the received DGI is not already stored in the data storage unit 80. The above-mentioned written flag in the management information storage unit 81a is changed to “1”. As described above, when the data included in the STORE DATA command is stored in the data storage unit 80, the command processing unit 52a stores the information related to the DGI included in the STORE DATA command (for example, “1” of the written flag). The information is stored in the management information storage unit 81a.

Next, the operation of the IC card 1a of this embodiment will be described with reference to FIG.
FIG. 11 is a flowchart showing an example of the STORE DATA command processing of the IC card 1a of this embodiment.
In FIG. 11, the process from step S201 to step S203 is the same as the process from step S101 to step S103 shown in FIG.

  In step S204, the command processing unit 52a determines whether or not the written flag corresponding to the received DGI is “1”. That is, for example, the command processing unit 52 a refers to the DGI table storage unit 60 and acquires the file identifier of the EF corresponding to the received DGI from the DGI table storage unit 60. The command processing unit 52a refers to the file management information storage unit 81a and determines whether or not the written flag corresponding to the acquired file identifier is “1”. When the written flag corresponding to the received DGI is “1” (step S204: YES), the command processing unit 52a determines that the data corresponding to the DGI is already stored in the data storage unit 80. Then, the process proceeds to step S208. Further, when the written flag corresponding to the received DGI is “0” (step S204: NO), the command processing unit 52a indicates that the data corresponding to the DGI is not yet stored in the data storage unit 80. Determination is made, and the process proceeds to step S205.

The subsequent processing in step S205 and the processing from step S207 to step S211 are the same as the processing in step S105 and the processing from step S107 to step S111 shown in FIG.
In step S206, the command processing unit 52a stores “1” in the written flag corresponding to the received DGI in the file management information storage unit 81a. That is, the command processing unit 52a changes the written flag corresponding to the received DGI to “1”.

As described above, the IC card 1a according to the present embodiment includes the UART 4 (communication unit), the reception processing unit 51 (reception unit), the file management information storage unit 81a (data identifier storage unit), and the command processing unit 52a. (Processing unit) and a transmission processing unit 53 (transmission unit).
As a result, the IC card 1a according to the present embodiment does not need to use a read command or the like different from the issued command when confirming the written data, as in the first embodiment. The types of commands to be performed can be reduced. That is, the IC card 1a according to the present embodiment can reduce the types of commands used in the issuing process, as in the first embodiment.

In the present embodiment, the information related to DGI includes information (for example, a written flag) indicating whether data is already stored in a data area (for example, EF) corresponding to DGI. That is, the file management information storage unit 81a stores information (for example, a written flag) indicating whether or not data is already stored in a data area (for example, EF) corresponding to DGI as information related to DGI. To do. The command processing unit 52a refers to the file management information storage unit 81a using the received DGI, and indicates whether or not data has already been stored in a data area (for example, EF) corresponding to the DGI ( For example, based on the written flag), it is determined whether or not data corresponding to DGI is already stored in the data storage unit 80.
As a result, the IC card 1a according to the present embodiment uses the DGI by simple means using information (for example, a written flag) indicating whether or not data is already stored in the data area (for example, EF) corresponding to the DGI. It can be determined whether or not data corresponding to is already stored in the data storage unit 80.

In the present embodiment, the file management information storage unit 81a (data identifier storage unit) is an electrically rewritable nonvolatile memory (for example, EEPROM 8).
As a result, the IC card 1a according to the present embodiment does not erase information related to DGI even if it is reset, so it corresponds to a case where resetting is performed during the issuing process or a case where the issuing process is divided into a plurality of processes. can do.

  In the first embodiment, the past reception DGI storage unit 70 has been described as being configured by the RAM 7. However, the past reception DGI storage unit 70 may be configured by an electrically rewritable nonvolatile memory (for example, EEPROM 8). . As a result, as in the second embodiment, since the past received DGI does not disappear even if the IC card 1 is reset, the IC card 1 is reset during the issuing process or the issuing process is divided into a plurality of processes. Etc.

In each of the above embodiments, the example of the STORE DATA command has been described as an example of the write request (write command). However, the present embodiment may be applied to other write requests (write commands).
In each of the above embodiments, the IC card 1 (1a) has been described as communicating with the external device 2 via the contact unit 3. You may comprise so that it may communicate.

  In each of the above embodiments, the IC card 1 (1a) is configured to include the EEPROM 8 as a rewritable nonvolatile memory, but the present invention is not limited to this. For example, the IC card 1 (1a) may include a flash memory, a FeRAM (Ferroelectric Random Access Memory), etc. instead of the EEPROM 8.

  According to at least one embodiment described above, the reception processing unit 51 that receives the STORE DATA command including the data to be stored in the data storage unit 80 and the DGI for identifying the data from the external device 2, and the data storage unit The past received DGI storage unit 70 for storing information related to the DGI corresponding to the data stored in 80, and the received DGI based on the information related to the DGI stored in the past received DGI storage unit 70 It is determined whether or not data is stored in the data storage unit 80, and when data corresponding to DGI is not stored in the data storage unit 80, the data included in the STORE DATA command is stored in the data storage unit 80. , STORE DATA frame when data corresponding to DGI is stored in the data storage unit 80. The command processing unit 52 that determines whether or not the data included in the command matches the data corresponding to the DGI stored in the data storage unit 80, and whether or not they match as determined by the command processing unit 52 By having the response including the information indicating the determination result, the transmission processing unit 53 that transmits the response to the external device 2, the types of commands used in the issuing process can be reduced.

The above embodiment can be expressed as follows.
A communication unit that communicates with an external device via a contact unit;
A receiving unit for receiving a write request including data to be stored in a data storage unit and a data identifier for identifying the data via the communication unit;
A data identifier storage unit for storing the data identifier corresponding to the data stored in the data storage unit;
When the data identifier included in the write request for the data identifier received by the reception unit is not stored in the data identifier storage unit, the data included in the write request is stored in the data storage unit, If the data identifier is stored in the data identifier storage unit, whether or not the data included in the write request matches the data corresponding to the data identifier stored in the data storage unit A processing unit for determining;
An IC card comprising: a transmission unit that transmits a response including information indicating the determination result of whether or not they are determined determined by the processing unit to the external device via the communication unit.

In addition, the program for realizing the function of each component included in the IC card 1 (1a) in the embodiment is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system, By executing, the processing in each configuration included in the IC card 1 (1a) described above 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.
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.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 1, 1a ... IC card, 2 ... External device, 3 ... Contact part, 4 ... UART, 5 ... CPU, 6 ... ROM, 7 ... RAM, 8 ... EEPROM, 10 ... IC module, 50, 50a ... Control part, 51 ... Reception processing unit, 52, 52a ... Command processing unit, 53 ... Transmission processing unit, 60 ... DGI table storage unit, 70 ... Past reception DGI storage unit, 71 ... Reception buffer, 72 ... Transmission buffer, 80 ... Data storage unit, 81, 81a ... file management information storage unit, 100 ... IC chip, PT ... card substrate

Claims (9)

A data storage unit for storing data;
A receiving unit for receiving a write request including data to be stored in the data storage unit and a data identifier for identifying the data from an external device;
A data identifier storage unit for storing information related to the data identifier corresponding to the data stored in the data storage unit;
Based on information related to the data identifier stored in the data identifier storage unit, it is determined whether data corresponding to the data identifier received by the receiving unit is stored in the data storage unit, and the data When data corresponding to an identifier is not stored in the data storage unit, data included in the write request is stored in the data storage unit, and data corresponding to the data identifier is stored in the data storage unit. A processing unit that determines whether data included in the write request matches data corresponding to the data identifier stored in the data storage unit,
An IC card comprising: a transmission unit configured to transmit a response including information indicating the determination result of whether or not they match determined by the processing unit to the external device. The IC according to claim 1, wherein when the data included in the write request is stored in the data storage unit, the processing unit stores information on the data identifier included in the write request in the data identifier storage unit. card. The data identifier storage unit stores the data identifier as information related to the data identifier,
The processor is
And determining whether data corresponding to the data identifier is stored in the data storage unit based on whether the data identifier included in the write request is stored in the data identifier storage unit. The IC card according to claim 1 or 2. The data identifier storage unit stores information indicating whether data is already stored in a data area of the data storage unit corresponding to the data identifier as information related to the data identifier,
The processing unit indicates whether data is already stored in a data area of the data storage unit corresponding to the data identifier obtained by referring to the data identifier storage unit using the received data identifier The IC card according to claim 1, wherein it is determined based on the information whether data corresponding to the data identifier is stored in the data storage unit. The IC card according to any one of claims 1 to 4, wherein the data identifier storage unit is a volatile memory. The IC card according to any one of claims 1 to 4, wherein the data identifier storage unit is an electrically rewritable nonvolatile memory. A data storage unit for storing data;
A receiving unit for receiving a write request including data to be stored in the data storage unit and a data identifier for identifying the data from an external device;
A data identifier storage unit for storing information related to the data identifier corresponding to the data stored in the data storage unit;
Based on information related to the data identifier stored in the data identifier storage unit, it is determined whether data corresponding to the data identifier received by the receiving unit is stored in the data storage unit, and the data When data corresponding to an identifier is not stored in the data storage unit, data included in the write request is stored in the data storage unit, and data corresponding to the data identifier is stored in the data storage unit. A processing unit that determines whether data included in the write request matches data corresponding to the data identifier stored in the data storage unit,
An IC module comprising: a transmission unit that transmits a response including information indicating the determination result of whether or not they match determined by the processing unit to the external device. An IC module according to claim 7;
An IC card comprising: a card body in which the IC module is embedded. A data storage unit that stores data; and a data identifier storage unit that stores information related to the data identifier corresponding to the data stored in the data storage unit, the data identifier identifying the data To the computer that the IC card has,
A reception step of receiving a write request including data to be stored in the data storage unit and a data identifier for identifying the data from an external device;
A determination step for determining whether data corresponding to the data identifier received by the reception step is stored in the data storage unit based on information related to the data identifier stored in the data identifier storage unit; ,
When data corresponding to the data identifier is not stored in the data storage unit, data included in the write request is stored in the data storage unit, and data corresponding to the data identifier is stored in the data storage unit A process step for determining whether or not the data included in the write request and the data corresponding to the data identifier stored in the data storage unit match,
A program for executing a transmission step of transmitting a response including information indicating the determination result of whether or not they are determined determined by the processing step to the external device.

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