JP6686725B2 - Electronic information storage medium, information processing method, and information processing program - Google Patents

Description

  The present invention relates to the technical field of electronic information storage media such as IC chips.

  In the IC card, if the hardware or data inside the IC card is damaged by an external impact or static electricity, a command from an external device may cause a malfunction. Therefore, the IC card is required to perform self-diagnosis in order to operate normally when it receives a command from an external device.

  Under the circumstances, in Patent Document 1, when a reset signal is received from an external device, a first self-diagnosis (self-diagnosis necessary for ATR transmission and command reception, for example, operation confirmation of a buffer memory used when transmitting and receiving data) is performed. After sending the ATR (Answer To Reset) signal to the external device after performing the diagnosis related to the hardware part, etc., and then receiving the command, the second self-diagnosis (the operation related to the command response processing) is normally executed. For checking whether or not it is possible, for example, a CPU, a RAM, a ROM or the like for checking whether or not a predetermined operation according to a command input to an IC chip can be normally executed. An IC card is disclosed that performs a command response process according to a command after performing a basic operation check), and then transmits a response to the command. There.

JP, 2011-39656, A

  On the other hand, when the IC card receives the reset signal or the command from the external device, the IC card transmits the ATR signal or the response within the time limit defined by the standard (for example, ISO / IEC7816-3). There is a need. If the IC card cannot transmit within this time limit, the external device determines that an error has occurred and terminates the process without transmitting the subsequent command.

  However, in the technique described in Patent Document 1, the IC card performs the self-diagnosis before transmitting the ATR signal and the response to the external device. Therefore, if the self-diagnosis takes time, the ATR signal and the There is a problem that a response cannot be sent. Further, when the IC card cannot send a response within the time limit, it is possible to send an extension request to an external device to notify that the process is being continued, but in this case useless communication cost occurs. Resulting in.

  Therefore, according to the present invention, it is possible to perform another process different from the command corresponding process according to the command received from the external device (for example, a process such as a memory check process necessary for the IC card to operate normally). It is an object of the present invention to provide an electronic information storage medium, an information processing method, and the like that can suppress the occurrence of useless communication due to the fact that another process is not completed within the time limit.

  In order to solve the above-mentioned problem, the invention according to claim 1 receives a command from a terminal device, executes a command corresponding process according to the command, and sends a response to the command to the terminal device within a time limit. An electronic information storage medium to be transmitted, which executes another process different from the command corresponding process after the command corresponding process is completed and before the response is transmitted, and the another process is not completed within the time limit. In addition, the separate processing executing means for interrupting the separate processing is provided, and the separate processing executing means judges whether or not there is another suspended processing every time the command corresponding processing is completed, When there is another process, the other process that has been suspended is restarted and executed.

  According to the invention described in claim 1, another process different from the command corresponding process according to the command received from the terminal device can be performed, and if the other process is not completed within the time limit, another process is performed. Since the command is interrupted and restarted after the command corresponding process is completed when the next command is received, it is possible to suppress the occurrence of useless communication due to another process not being completed within the time limit.

  Note that in the present invention, it may not be possible to restart and execute another process until the subsequent command is received after the other process is interrupted and a response is sent. Not done because. For example, when the terminal device is driven by a battery such as a mobile phone, in order to realize low power consumption, a clock is applied to the IC card while not communicating with the IC card inserted in the mobile phone. It is often designed to (temporarily) stop the supply of. This is because the IC card operates at the clock supplied from the mobile phone, and therefore, if the supply of the clock is stopped, the IC card cannot perform processing.

  The invention according to claim 2 is the electronic information storage medium according to claim 1, wherein the different process is an abnormality detection process inside the electronic information storage medium, and an abnormality is detected by the abnormality detection process. In this case, the electronic information storage medium is further provided with an abnormal response transmission means for transmitting an abnormal response indicating that an abnormality has been detected inside the electronic information storage medium to the terminal device that has transmitted the command. .

  According to the second aspect of the present invention, it is possible to notify the terminal device that has transmitted the command that an abnormality has been detected inside the electronic information storage medium.

  The invention according to claim 3 is the electronic information storage medium according to claim 1, wherein the separate process is an abnormality detection process inside the electronic information storage medium, and an abnormality is detected by the abnormality detection process. In this case, the operation is stopped.

  According to the invention described in claim 3, since the operation is stopped when an abnormality is detected inside the electronic information storage medium, it is possible to eliminate an adverse effect on the terminal device and the user due to the continued operation.

  According to a fourth aspect of the present invention, information by an electronic information storage medium that receives a command from a terminal device, executes a command corresponding process according to the command, and transmits a response to the command to the terminal device within a time limit. A method of processing, wherein after the command corresponding process is completed, before the response is transmitted, another process different from the command corresponding process is executed, and if the other process is not completed within the time limit, It includes a separate processing execution step of interrupting processing, and in the separate processing execution step, each time the command corresponding processing is completed, it is determined whether or not there is another processing being interrupted, and there is another processing being interrupted. In this case, another process that has been suspended is restarted and executed.

  The invention according to claim 5 is included in an electronic information storage medium that receives a command from a terminal device, executes a command corresponding process according to the command, and transmits a response to the command to the terminal device within a time limit. The computer executes another process different from the command corresponding process after the command corresponding process is completed and before the response is transmitted, and when the different process is not completed within the time limit, the different process is executed. It is an information processing program which functions as another processing execution means to be interrupted, wherein the another processing execution means determines whether or not there is another processing being interrupted each time the command corresponding processing is completed, When there is another processing in the middle, it is characterized in that the other processing being suspended is restarted and executed.

  According to the present invention, it is possible to perform another process different from the command corresponding process according to the command received from the terminal device, and if the other process is not completed within the time limit, interrupt the other process and When the command is received, the command corresponding process is restarted after completion, so that it is possible to suppress the occurrence of useless communication due to another process not being completed within the time limit.

It is a block diagram showing an example of outline composition of personal digital assistant 1 concerning this embodiment. It is a block diagram showing an example of outline composition of UIM card 18 concerning this embodiment. 9 is a flowchart showing an outline of an operation of a CPU 181 when receiving a command.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The embodiment described below is an embodiment in which the present invention is applied to a UIM card provided in a mobile terminal.

  First, with reference to FIG. 1 and the like, a configuration and a functional outline of a mobile terminal 1 (an example of a “terminal device”) according to the present embodiment will be described.

[1. Configuration of mobile terminal 1]
FIG. 1 is a block diagram showing a schematic configuration example of the mobile terminal 1 according to the present embodiment. As shown in FIG. 1, the mobile terminal 1 is configured to include a control unit 11, a storage unit 12, a wireless communication unit 13, a display unit 14, an input unit 15, an IC card interface 16, a CLF 19, and the like, and these configurations. The elements are connected to each other via a bus 17. The mobile terminal 1 is, for example, a mobile phone, a smartphone, a tablet terminal, or the like.

  The control unit 11 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The storage unit 12 is composed of a non-volatile memory such as a flash memory. An operating system (OS) and middleware are stored in the ROM or the storage unit 12. Further, the storage unit 12 stores an API (Application Program Interface) and application software (software configured by an application program language) installed in the mobile terminal 1. The API is an interface for using the function of the operating system from the application software. The application software is, for example, a program that can be downloaded from a predetermined server.

  The wireless communication unit 13 has an antenna and controls wireless communication performed with a base station in the mobile communication network. The display unit 14 has, for example, a touch panel type display panel, and controls display on the display panel and receives operation instructions from the user. The input unit 15 has an operation button for inputting an operation instruction from the user, and outputs a signal corresponding to the operation button to the control unit 11. The IC card interface 16 serves as an interface between the control unit 11 and the UIM card 18 and an interface between the control unit 11 and the CLF 19.

  The UIM card 18 is one of UICCs (Universal Integrated Circuit Cards), and is equipped with, for example, a contact IC chip whose function is expanded based on a conventional SIM (Subscriber Identity Module).

  The CLF 19 is a contactless IC chip that performs contactless communication defined by the NFC standard, and is an antenna for transmitting and receiving various signals to and from a reader (not shown) in the field of contactless communication. It is connected to the. Then, when the user holds the portable terminal 1 over the reading device, the command sent from the reading device is sent to the UIM card card 18 via an interface (not shown). The CLF 19 can be operated by the OS of the mobile terminal 1.

[2. Configuration of IC chip C]
FIG. 2 is a block diagram showing a schematic configuration example of the IC chip C mounted on the UIM card 18 according to the present embodiment. As shown in FIG. 2, the IC chip C includes a CPU 181 (an example of “computer”), a RAM 182, a non-volatile memory 183, an I / O circuit 184, etc., and these components are mutually connected via a bus 185. Connected.

  The IC chip C is adapted to execute a command corresponding process corresponding to the command according to the power, the signal, the clock and the command required for the operation inputted from the portable terminal 1 or the like as the outside.

  Specifically, under the control of the control unit 11 of the mobile terminal 1, the power and the reset command necessary for the operation of the IC chip C are transmitted to the IC chip C in order to activate the IC chip C.

  Here, activation is defined by a standard (for example, ISO / IEC7816 or the like), and therefore detailed description thereof is omitted, but it indicates a predetermined operation for making the IC chip C usable.

  When the activation is completed, the CPU 181 outputs an ATR (Answer To Reset) signal, which is an example of a response, to the mobile terminal 1.

  The ATR signal is a well-known signal, and therefore its detailed description is omitted, but it indicates a configuration display character (T0), a connection information character (TA (i), etc.), a management information character, a parameter indicating a transmission protocol, and the like. It contains information and consists of up to 32 bytes. In other words, the ATR signal is an initial response output from the IC chip C after the IC chip C is activated.

  When the ATR signal is output, the IC chip C becomes operable. Therefore, the IC chip C performs a command corresponding process (for example, an output request of data stored in the IC chip C) corresponding to a command input from the mobile terminal 1 according to a clock supplied from the mobile terminal 1. Ready to run.

  The nonvolatile memory 183 is, for example, a flash memory, but may be “Electrically Erasable Programmable Read-Only Memory”. The RAM 182 stores data that is temporarily necessary for the OS and middleware to function, for example. The non-volatile memory 183 stores, for example, an OS and middleware.

  The I / O circuit 184 has eight connection terminals C1 to C8 defined by ISO7816 or the like. For example, the C1 terminal is a power supply terminal, the C2 terminal is a reset terminal, the C3 terminal is a clock terminal, the C5 terminal is a ground terminal, and the C7 terminal is a terminal for performing data communication with the mobile terminal 1.

  Then, when the CPU 181 receives a command from the CLF 19, the CPU 181 executes a command handling process according to the command and responds to the CLF 19 (specifically, transmits data indicating the result of the command handling process to the CLF 19). . Further, when the CPU 181 receives a command from the control unit 11, the CPU 181 executes a command handling process according to the command and responds to the control unit 11 (specifically, controls data indicating the result of the command handling process. To the department 11).

  Also, the CPU 181 executes a memory check process (an example of “another process”) that is different from the command corresponding process after the command corresponding process is completed and before sending a response, and the memory check process is defined by the standard. If it is not completed within the specified time limit, the memory check process is interrupted. Then, the CPU 181 determines each time the command corresponding process is completed, determines whether there is a suspended memory check process, and if there is a suspended memory check process, restarts the suspended memory check process and executes the suspended memory check process. To do. In the memory check process, for example, a value is written in the memory and it is checked whether the written value can be read. It should be noted that the CPU 181 performs an IC for the mobile terminal 1 (an example of “a terminal device that has transmitted a command to an electronic information storage medium”) when an abnormality is found by the memory check process (an example of “anomaly detection processing”). An abnormality response indicating that an abnormality is detected inside the chip C is transmitted. Further, the CPU 181 may stop the operation of the IC chip C (or the CPU 181) when an abnormality is found by the memory check process.

[3. Operation example of CPU 181]
Hereinafter, the above-mentioned operation will be described in detail with reference to the flowchart of FIG.

  First, the CPU 181 receives a command from the mobile terminal 1 (step S101).

  Next, the CPU 181 starts command corresponding processing corresponding to the command received in the processing of step S101 (step S102).

  Next, the CPU 181 determines whether or not the command handling process has been completed (step S103). At this time, when the CPU 181 determines that the command handling process is not completed (step S103: NO), it then determines whether there is time until the time limit (step S104).

  When the CPU 181 determines that there is time until the time limit (step S104: YES), the CPU 181 proceeds to the process of step S103.

  On the other hand, when the CPU 181 determines that the time is not up to the time limit (step S104: NO), the command handling process is interrupted (step S105) and extended (WTX (Waiting Time eXtension: extension of waiting time)). The request is transmitted to the mobile terminal 1 (step S106). Then, when the CPU 181 receives the response to the extension request from the mobile terminal 1 (step S107), it restarts the command handling process interrupted in the process of step S105 (step S108), and shifts to the process of step S103. In the present embodiment, for example, assuming the case of communication by the T = 1 protocol (contact) or the case of non-contact communication, the IC chip C transmits an extension request to the mobile terminal 1 and responds to it. Although the extension procedure is performed by bidirectional communication of receiving a message, for example, assuming the case of communication by the T = 0 protocol (contact), the IC chip C transfers the NULL byte (hexadecimal number) to the mobile terminal 1. The extension procedure may be performed by one-way communication of transmitting "60").

  On the other hand, if the CPU 181 determines in the process of step S103 that the command handling process has ended (step S103: YES), then it determines whether the memory check process is being interrupted (step S109). . At this time, when the CPU 181 determines that the memory check process is not suspended (step S109: NO), it starts the memory check process (step S110). On the other hand, when it is determined that the memory check process is suspended (step S109: YES), the memory check process is restarted (step S111). The case where the memory check process is suspended corresponds to the case where the memory check process executed after the command corresponding process is executed at the time of the previous command reception is interrupted by the process of step S114.

  Next, the CPU 181 determines whether or not the memory check process is completed (step S112). At this time, when the CPU 181 determines that the memory check process is completed (step S112: YES), the CPU 181 proceeds to the process of step S115. On the other hand, when the CPU 181 determines that the memory check process is not completed (step S112: NO), it then determines whether or not there is time until the time limit (step S113).

  When the CPU 181 determines that there is time until the time limit (step S113: YES), the CPU 181 proceeds to the process of step S112.

  On the other hand, when determining that the time limit is not reached (step S113: NO), the CPU 181 interrupts the memory check process (step S114) and transmits a response to the mobile terminal 1 (step S115).

  As described above, the IC chip C (an example of “electronic information storage medium”) in the present embodiment receives a command from the mobile terminal 1 (an example of “terminal device”) and executes the command corresponding process according to the command. Then, the response to the command is transmitted within the time limit to the mobile terminal 1. Then, the CPU 181 (an example of “another process executing means”) defines the command response process after the command response process is completed and before the response is transmitted. If a different memory check process (an example of “another process”) is executed and the memory check process is not completed within the time limit, the memory check process is interrupted. Further, the CPU 181 determines whether or not there is a suspended memory check process each time the command corresponding process is completed, and if there is a suspended memory check process, the suspended memory check process is restarted and executed. To do.

  Therefore, according to the IC chip C of the present embodiment, it is possible to perform the memory check processing different from the command corresponding processing according to the command received from the mobile terminal 1, and when the memory check processing is not completed within the time limit. In this case, the memory check process is interrupted and restarted after the command handling process is completed when the next command is received. Therefore, it is possible to prevent unnecessary communication from occurring due to the memory check process not being completed within the time limit. be able to.

  Note that the CPU 181 (an example of “abnormality response transmitting means”) transmits the command to the mobile terminal 1 (“an electronic information storage medium” when an abnormality is found by the memory check process (an example of “abnormality detection process”). It is assumed that an abnormal response indicating that an abnormality is detected inside the IC chip C is transmitted to (an example of a “terminal device”). As a result, it is possible to notify the portable terminal 1 that has transmitted the command that an abnormality has been detected inside the IC chip C. The transmission timing of the abnormal response may be, for example, the timing of transmitting the ATR signal for the reset signal (transmitted together with the ATR signal) or the timing of transmitting the response for the command (transmitted together with the response).

[4. Modification]
Next, a modified example of the above embodiment will be described. The modifications described below can be combined as appropriate.

[4.1. Modification 1]
In the above embodiment, the memory check process is executed after the command is received and the command corresponding process according to the command is executed and before the response is transmitted. When doing so, the memory check process may be executed. For example, the memory check process may be executed after the reset signal is received and the process according to the reset signal is executed, and within the time limit before the ATR signal is transmitted. In this case, if an abnormality is detected in the memory check process, the abnormality response may be transmitted together with the ATR signal.

[4.2. Modification 2]
In the above embodiment, the case where the different process different from the command corresponding process is the memory check process has been described. However, the different process is a process for checking whether or not the operation related to the command corresponding process can be normally executed, for example, an IC chip. It may be inspection processing of a CPU, RAM, ROM or the like for inspecting whether or not a predetermined operation according to a command input to can be normally executed.

1 Mobile Terminal 11 Control Unit 12 Storage Unit 13 Wireless Communication Unit 14 Display Unit 15 Input Unit 16 IC Card Interface 17 Bus 18 UIM Card C IC Chip 181 CPU
182 RAM
183 Non-volatile memory 184 I / O circuit 185 Bus 19 CLF

Claims (5)

An electronic information storage medium for receiving a command from a terminal device, executing a command corresponding process according to the command, and transmitting a response to the command to the terminal device within a time limit,
After completion of the command handling process, before the response is transmitted, another process different from the command handling process is executed, and if the other process is not completed within the time limit, another process is interrupted. Equipped with execution means,
Each time the command corresponding process is completed, the separate processing execution means determines whether there is another processing that is being suspended, and if there is another processing that is being suspended, restarts the other processing that is being suspended. An electronic information storage medium characterized by being executed as a program. The electronic information storage medium according to claim 1,
The another process is an abnormality detection process inside the electronic information storage medium,
When an abnormality is detected by the abnormality detection processing, an abnormality response that transmits an abnormality response indicating that an abnormality has been detected inside the electronic information storage medium to the terminal device that has transmitted a command to the electronic information storage medium. An electronic information storage medium further comprising a transmission means. The electronic information storage medium according to claim 1,
The another process is an abnormality detection process inside the electronic information storage medium,
An electronic information storage medium, which stops operation when an abnormality is found by the abnormality detection processing. An information processing method using an electronic information storage medium, which receives a command from a terminal device, executes a command corresponding process according to the command, and transmits a response to the command to the terminal device within a time limit,
After completion of the command handling process, before the response is transmitted, another process different from the command handling process is executed, and if the other process is not completed within the time limit, another process is interrupted. Including the execution process,
In the separate processing execution step, each time the command corresponding processing is completed, it is determined whether or not there is another processing that is being suspended, and if there is another processing that is being suspended, the another processing that is being suspended is restarted. An information processing method characterized in that the method is carried out as follows. A computer included in an electronic information storage medium that receives a command from a terminal device, executes a command corresponding process according to the command, and transmits a response to the command to the terminal device within a time limit,
After completion of the command handling process, before the response is transmitted, another process different from the command handling process is executed, and if the other process is not completed within the time limit, another process is interrupted. Execution means,
An information processing program to function as
Each time the command corresponding process is completed, the separate processing execution means determines whether there is another processing that is being suspended, and if there is another processing that is being suspended, restarts the other processing that is being suspended. An information processing program characterized by being executed as a program.

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