JP2005332083A - Multi-application type ic card mounted with common command application - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multi-application type IC card for efficiently using a rewritable memory. <P>SOLUTION: An EEPROM 13 of a multi-application type IC card is mounted with a common command application 40 in which an application 30 can be used in common. A command executing means 21 entrusts the common command application 40 with the processing of a command received from an external device outside a figure, and entrusts the application 30 with the processing when the processing is not executable by the common application 40. Therefore, it is possible to efficiently use a writable memory by providing the common application 40. Also, a common command application erasing means 22 is provided with a function which does not erase the common command application 40 when the common application 40 is being currently used. Thus, the common application 40 can be prevented from being erased by mistake. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an IC card in which a semiconductor integrated circuit (hereinafter referred to as an IC chip) is embedded in a credit card-sized plastic card, and more particularly to a multi-application type IC card capable of mounting a plurality of applications in a rewritable memory.

  An IC card is a card in which an IC chip is embedded in a credit card-sized plastic card and data is recorded in the memory of the IC chip. In recent years, IC cards have been widely applied to cash cards, credit cards, electronic money, and the like.

  Conventionally, it has been the mainstream to install a single software, that is, an application in a read only memory (hereinafter referred to as ROM) for each IC card, so a single IC card has only a single function. IC card was necessary for each application. For this reason, the user must always have a plurality of IC cards, which is very inconvenient. In order to solve this problem, multi-application type IC cards capable of incorporating a plurality of applications in one IC card are now becoming mainstream.

  A multi-application IC card is an IC card in which a plurality of applications can be mounted in a rewritable memory. A multi-application operating system (hereinafter referred to as OS) that performs basic processing on a ROM provided in an IC chip. ), And one or more applications are mounted on an electrically erasable and rewritable ROM (Electrically Erasable Programmable Read Only Memory, hereinafter referred to as EEPROM), which is also included in the IC chip. .

  By mounting applications in rewritable memory, multiple applications used by users can be mounted on a single IC card, and applications can be added after IC card manufacture, unnecessary applications can be deleted, and It is also easy to expand application functions.

  However, in the above-mentioned multi-application type IC card, even if the command code of the application has the same contents, it is necessary to mount all data of the application in a rewritable memory. Therefore, multiple applications having the same command code can be rewritten. When implemented in a rewritable memory, a plurality of identical command codes exist in the rewritable memory, and there is a problem that the rewritable memory cannot be used efficiently.

In order to solve this problem, for example, in Patent Document 1, a rewritable memory is divided into an application code area for storing an application code and an application data area used by the application program. In the case of an application for processing, an invention is disclosed that efficiently uses a rewritable memory by sharing application program code and individualizing only data.
JP 2003-202111 A

  However, the above-described conventional technique has a problem that it is difficult to implement individual commands for each application. Many applications often have commands that can be shared, such as password authentication and data reading and writing, and individual commands for each application such as point, and different applications that perform the same operation can be used in the same IC. It is rare to mount on a card.

  In addition, if an application that uses a common command that is implemented in a rewritable memory is installed, if the common command is deleted by mistake, the application that uses the common command will not operate normally. There is also a problem.

  Therefore, in view of the above problems, the present invention can efficiently use a rewritable memory by implementing a common command application that can be commonly used by applications, and can easily implement individual commands for each application. An object of the present invention is to provide a multi-application IC card that does not accidentally delete the common command.

  A first problem-solving means for solving the above-mentioned problem is to implement a common command application storing commands commonly used by applications in the rewritable memory in a multi-application type IC card capable of mounting applications in a rewritable memory. And command execution means for delegating the processing of the command received from the external terminal to the common command application, and delegating the processing of the command to the selected application when the command cannot be processed by the common command application. A multi-application type IC card.

  According to the first problem solving means, since the common command application is provided and the application can use the common command application, only one command that overlaps between applications needs to be mounted in a rewritable memory and can be rewritten. Memory can be used efficiently. In addition, since commands that cannot be processed by the common command application are transferred to the selected application, individual commands can be easily set for each application.

  Further, the second problem solving means is the multi-application IC card described in the first problem solving means, wherein the rewritable memory stores a plurality of the common command applications. Type IC card.

  According to the second problem solving means, by storing a plurality of the common command applications in the rewritable memory, the common command application can be set for each use of the IC card.

  Further, the third problem solving means is the multi-application type IC card according to the first or second problem solving means, wherein the application includes common command information indicating the common command application used by the application, The command execution means is a multi-application type IC card that delegates processing of the command to the common command application indicated by the common command information of the selected application.

  According to the third problem solving means, by providing the common command information, the common command application used by the application can be set for each application. In addition, since the common command application can be set for each application, when the plurality of common command applications are implemented, the common command application used by the application can be selected from the plurality of common command applications.

  Further, the fourth problem solving means is the multi-application type IC card according to the third problem solving means, wherein the multi-application type IC card comprises common command application deletion means for deleting the common command application, and the common command The application deletion means has a function of canceling the deletion of the common command application when the common command application to be deleted is indicated in the common command information stored in the rewritable memory. This is an IC card.

  According to the fourth problem solving means, by providing the common command application deleting means, when the application using the common command application to be deleted is mounted in a rewritable memory, the common command application is Not deleted.

  According to the inventions described so far, it is possible to efficiently use a rewritable memory by providing a common command application that is used in common by the application, and further easily implement individual commands for each application, and further use in the application. The common command application to be set can be set for each application, and in addition, a multi-application IC card can be provided in which the common command is not accidentally deleted.

  Embodiments of the present invention will be described below in detail with reference to the drawings.

  First, the software and data structure of the multi-application IC card of this embodiment will be described. First, the software structure of the multi-application IC card and the structure of the IC chip will be described. FIG. 1 is a diagram for explaining the software structure of a multi-application IC card, and FIG. 2 is a diagram for explaining the structure of an IC chip.

  As shown in FIG. 1, the software structure of the multi-application type IC card has a common command application 40 (hereinafter referred to as a common command App) that stores a common command used in common by the IC chip 10, the multi-application OS 20, the application 30, and the application 30. App is an abbreviation of Application).

  FIG. 2 is a structural diagram of the IC chip 10. The IC chip 10 includes a central processing unit 11 (hereinafter referred to as “CPU”), a read-only memory 12 (hereinafter referred to as “ROM”), and an EEPROM 13 (Electrically Erasable Programmable Read-Only Memory) as rewritable memory. A random access memory 14 (hereinafter referred to as RAM) as a volatile memory and an I / O circuit 15 for communicating data with an external terminal (not shown).

  The present invention does not limit the specifications of the IC chip 10, and the IC chip 10 having specifications suitable for the use of the IC card can be selected. For example, the capacities of the ROM 12 and the EEPROM 13 are not limited, and the rewritable memory may be a memory other than the EEPROM such as a ferroelectric memory or a flash memory. The IC chip 10 may include other devices (not shown) such as a timer circuit, a cryptographic operation circuit, or a coprocessor circuit.

  The multi-application OS 20 is an IC card such as a function for mounting the application 30 and the common command App 40 on the EEPROM 13, a function for deleting the application 30 mounted on the EEPROM 13, and a function for controlling the I / O circuit 15 and communicating with an external terminal not shown. In addition to the basic functions for operating, a command execution means 21 for processing a command message received from an external terminal (not shown) using a common command App 40 and a common command application deletion means 22 for deleting a common command application (hereinafter, referred to as “command command means 21”). Common command App deletion means). In general, the multi-application OS 20 is mounted on the ROM 12.

  Currently, JAVA (registered trademark) and Multis (registered trademark) are well known as IC card multi-application OS 20, but the present invention does not limit the type of multi-application OS.

  The application 30 is software designed for a certain use, and one or a plurality of applications 30 required by the user are mounted on the EEPROM 13. Note that the application 30 to be mounted is generally described in an intermediate language supported by the multi-application OS 20.

  The common command App40 is an application in which commands (for example, password authentication command, data read / write command, etc.) used in common by the application 30 are described. The data used by the common command App 40 may have data (for example, when the common command is a password authentication command, the common command has a password), and the data of the application 30 is used. (For example, when the common command is a data read / write command, the data of the application 30 is read / written).

  The EEPROM 13 stores application information 50 as common command information. Each time one common command App 40 or application 30 is installed in the EEPROM 13, one application information 50 corresponding to the common command App 40 or application 30 implemented by the multi-application OS 20 is stored in the EEPROM 13.

  FIG. 3 is a diagram for explaining the application information 50. One piece of application information 50 includes an application name 501 that is information for identifying the application 30 (or common command App40), an application storage address 502 that stores the application 30 (or common command App40), and an application 30 (or common command App40). The common command App name 503 is stored as information for specifying the common command App 40 used by.

  The application name 501 is information for identifying an application (or common command App40) such as AID (Application Identification Data) defined in the ISO 7816 standard, for example, and is information used when selecting the application 30.

  The application storage address 502 indicates the address of the EEPROM 13 on which the application 30 (or common command App40) specified by the application name 501 is mounted.

  The common command App name 503 is information specifying the common command App 40 used by the application 30 (or common command App 40), and the application name 501 of the common command App 40 used by the application 30 (or common command App 40) is stored. Is done. By storing the common command App name 503, the common command App40 used by the application 30 (or the common command App40) can be set.

  The command execution means 21 provided in the multi-application OS 20 is a means for processing a command with the common command App 40 before processing the command with the selected application 30.

  When receiving a command message from an external terminal (not shown), the command execution means 21 delegates the processing of the command to the common command App40.

  The common command App 40 for delegating the command processing is the common command App 40 specified by the common command App name 503 stored in the application information 50 of the selected application 30. The address of the EEPROM 13 in which the common command App 40 is stored is stored in the application information 50 having the application name 501 that matches the common command App name 503.

  When a plurality of common command App names 503 are stored in the application information 50 of the selected application 30, the command execution means 21 is specified by the common command App name 503 according to the order stored in the application information 50. The command processing is delegated to the common command App40.

  When the command cannot be processed by the common command App 40, the command execution unit 21 delegates the command processing to the selected application 30. The address of the EEPROM 13 in which the selected application 30 is stored is stored in the application storage address 502 of the selected application information 50.

  The common command App deletion means 22 provided in the multi-application OS 20 is means for deleting the common command App 40 mounted on the EEPROM 13.

  When deleting the common command App 40 mounted on the EEPROM 13, the common command App deletion means 22 stores a common command App name 503 indicating the common command App 40 to be deleted in all application information 50 stored in the EEPROM 13. Investigate whether there is any.

  If there is at least one application information 50 in which the common command App name 503 indicating the common command App 40 to be deleted is stored, the common command App deletion unit 22 interrupts the process of deleting the common command App 40.

  When the common command App deleting means 22 deletes the common command App 40, the application information 50 of the common command App 40 deleted together with the common command App 40 is also deleted from the EEPROM 13.

<Description of IC card operation>
From here, the operation of the IC card configured as described above will be described. FIG. 4 is a flowchart showing a procedure for processing a command message received from an external device (not shown), and FIG. 5 is a flowchart showing an procedure for deleting the common command App40.

  First, a procedure for processing a command message received from an external device (not shown) will be described with reference to FIG. When the multi-application OS 20 receives a command message from an external terminal (not shown) (step S100), the command execution means 21 checks the common command App name 503 included in the application information 50 of the selected application 30 (step S110). ).

  In the next step, if the common command App name 503 is not set in the application information 50, the process proceeds to step S200 and command processing is delegated to the application program. If the common command App name 503 is set, the process proceeds to step S130 in which the common command App40 to which command processing is delegated is set to the common command App40 specified by the first stored common command name App503 (step S120). ).

  Here, setting to the common command App 40 identified by the common command name App 503 means storing the application storage address 502 of the common command App 40 having the same application name 501 as the common command name App 503 in the RAM 14 or the register of the CPU 11. To do.

  In step S130, command processing is delegated to the common command App40 in which the application storage address 502 is set in the register of the RAM 14 or the CPU 11.

  In the next step, if the command received by the common command App 40 can be processed, the process proceeds to step S300 and the common command corresponding to the received command message is executed. If the command received by the common command App40 cannot be processed, the process proceeds to step S150 (step S140).

  In step S150, the command execution means 21 checks the remaining common command App name 503. If there is no remaining common command App name 503, the process proceeds to step S200 and the received command is delegated to the application 30. If the remaining common command App name 503 is set, the common command App40 for delegating command processing is set to the common command App40 specified by the next stored common command name App503, and the process returns to step S130. .

  The command execution means 21 repeatedly executes step S130 to step S150, so that the command execution means 21 adds the common command App 40 specified by the common command App name 503 stored in the selected application information 50 to the common command App 40. Command processing can be delegated.

  If the received command can be processed by the common command App 40 that has been delegated the command processing, the processing of the common command is executed in step S300. When the command received by all the common commands App40 cannot be processed, the processing of the received command is delegated to the application 30 in step S200.

  Step S <b> 200 is a step in which the command execution unit 21 delegates command processing to the application 30.

  Step S210 is a step of confirming whether the command received by the application 30 can be processed. If the command can be processed, the process proceeds to step S310, and the application command corresponding to the received command is executed. If the command cannot be processed, the process proceeds to step S320, where it is determined that the received command cannot be processed.

  As described above, when the command can be processed by the common command App 40 specified by the common command App name 503 included in the application information 50 of the selected application 30, the common command is executed in step S300. .

  If the command cannot be processed by the common command App40, the command processing is delegated to the selected application 30, and if the command can be processed by the application 30, the unique command of the application 30 is executed in step S310. Is done.

  In addition, if command processing cannot be performed with the common command App 40 and the application 30, a reception command error occurs in step S320.

  Next, an operation for deleting the common command App40 will be described with reference to FIG. When the command for deleting the common command App 40 is received, the common command App deleting means 22 starts to investigate the common command App name 503 included in all the application information 50 stored in the EEPROM 13 (S400).

  In step 410, it is confirmed whether the common command App name 503 of the common command App40 to be deleted is set in the investigated application information 50.

  If even one common command App name 503 of the common command App 40 to be deleted is set in the investigated application information 50, the process proceeds to step S420, and the common command App deletion unit 22 stops the deletion process of the common command App 40.

  If no common command App name 503 that identifies the common command App 40 to be deleted is set, the process proceeds to step S430, and the common command App deletion unit 22 deletes the common command App 40 and the application information 50 of the common command App 40 to be deleted. .

The figure for demonstrating the structure of software. The figure for demonstrating the structure of IC chip. The figure for demonstrating application information. The flowchart for demonstrating the operation | movement procedure of a command. The flowchart for demonstrating the deletion procedure of a common command application.

Explanation of symbols

10 IC chip 12 ROM
13 EEPROM
20 Multi-application OS
21 Command execution means 22 Common command application deletion means 30 Application 40 Common command application 50 Application information 501 Application name included in application information 502 Application storage address included in application information 503 Common command application name included in application information

Claims (4)

  In a multi-application IC card in which an application can be mounted in a rewritable memory, a common command application storing a command commonly used by the application is mounted in the rewritable memory, and processing of a command received from an external terminal is performed in the common A multi-application type IC card comprising command execution means for delegating to a command application and delegating the processing of the command to a selected application when the command cannot be processed by the common command application .   2. The multi-application IC card according to claim 1, wherein a plurality of the common command applications are stored in the rewritable memory.   3. The multi-application IC card according to claim 1, wherein the application includes common command information indicating the common command application used by the application, and the command execution unit selects the selected application. A multi-application type IC card, wherein the command processing is delegated to the common command application indicated by the common command information. 4. The multi-application type IC card according to claim 3, wherein the multi-application type IC card includes a common command application deleting unit that deletes the common command application, and the common command application deleting unit is stored in the rewritable memory. An IC card having a function of canceling deletion of the common command application when the common command application to be deleted is indicated in the common command information that is deleted.

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