JP2018194995A - Electronic information storage medium, IC card, data transmission method, data writing method, data transmission program and data writing program - Google Patents

Abstract

To provide an electronic information storage medium and the like capable of shortening processing time of a reading process targeting a plurality of data stored in a storage unit based on a read command from an external device.SOLUTION: A storage unit stores position data including storage area information which indicates respective storage areas of the plurality of data stored in the storage unit. A processing unit collectively transmits the data stored in each of the plurality of storage areas to the external device when the processing unit receives a data read command including identification information for identifying the position data from the external device. The data stored in each of the plurality of storage areas is indicated by the storage area information included in the position data identified by the identification information.SELECTED DRAWING: Figure 5

Description

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

  A general file structure in an IC chip is a tree structure with a Master File (MF) as a vertex, a Dedicated File (DF) is placed under the MF, and an Elementary File (EF) is placed under the DF. (EF may be placed under MF).

  The EF is a data file for storing various data used in the application. In order for the external device to access the data stored in the EF, it is necessary to specify and access the data position. It is important to access data efficiently. Patent Document 1 discloses a technique for efficiently accessing data.

Japanese Patent No. 5259513

  By the way, in the case where the EF is a record organization file including one or more records (data), in order for the external device to access the record, first, which file is to be accessed is selected, and then the file You must select a record that is contained in.

  In the record operation command defined in the international standard ISO / IEC 7816-4, the external device can specify a file by a parameter included in the command, and can further specify a record by another parameter. The file that can be set for the file specification parameter is always single (specified by the current file or the Short file identifier), and the record that can be set for the record specification parameter is single, or continuous starting from the specified record A plurality of records (for example, from a specified record to the last record, etc.).

  Therefore, when external devices are placed in a single file and multiple records that are not consecutive are manipulated (read or write), or when records placed in multiple files are manipulated, the parameters are changed. However, there is a problem that a plurality of commands must be transmitted, and the processing time until all the operations are completed becomes extremely long.

  Therefore, the present invention provides an electronic information storage medium capable of shortening the processing time of a read process or a write process for a plurality of data stored in a storage unit based on a read command or a write command from an external device. The purpose is to provide.

  In order to solve the above-described problem, the invention according to claim 1 is an electronic information storage medium including a processing unit and a storage unit, wherein the storage unit is a plurality of pieces of data stored in the storage unit. Position data including storage area information indicating a storage area is stored, and when the processing unit receives a data read command including identification information for identifying the position data from an external device, the position identified by the identification information The data stored in each of the plurality of storage areas indicated by the storage area information included in the data is collectively transmitted to the external device.

  The invention according to claim 2 is an electronic information storage medium including a processing unit and a storage unit, and the storage unit stores storage area information indicating each storage area of a plurality of data stored in the storage unit. The processing unit is configured to correspond to identification information for identifying the position data from an external device and a plurality of storage areas indicated by the storage area information included in the position data identified by the identification information. When the data write command including the write data to be written is received, the corresponding write data is written to the plurality of storage areas, respectively.

  A third aspect of the present invention is the electronic information storage medium according to the first or second aspect, wherein the processing unit receives a command indicating that the position data is added, changed, or deleted from the external device. When received, the position data is added, changed or deleted according to the command.

  A fourth aspect of the present invention is an IC card including the electronic information storage medium according to any one of the first to third aspects.

  The invention according to claim 5 is a data transmission method in an electronic information storage medium including a processing unit and a storage unit, wherein the storage unit indicates each storage area of a plurality of data stored in the storage unit A step of storing position data including storage area information; and when the processing unit receives a data read command including identification information for identifying the position data from an external device, the position data identified by the identification information And storing the data stored in each of the plurality of storage areas indicated by the included storage area information to the external device.

  The invention according to claim 6 is a data writing method in an electronic information storage medium including a processing unit and a storage unit, wherein the storage unit indicates each storage area of a plurality of data stored in the storage unit A step of storing position data including storage area information; identification information for identifying the position data from the external device by the processing unit; and a plurality of storage area information included in the position data identified by the identification information And a step of writing the corresponding write data to the plurality of storage areas when receiving a data write command including the write data to be written corresponding to each of the storage areas. .

  The invention according to claim 7 is an electronic device comprising a processing unit and a storage unit, wherein the storage unit stores position data including storage area information indicating each storage area of a plurality of data stored in the storage unit. When the processing unit in the information storage medium receives a data read command including identification information for identifying the position data from an external device, a plurality of storage area information indicated by the position data identified by the identification information It is characterized by functioning as transmission means for collectively transmitting data stored in each storage area to the external device.

  According to an eighth aspect of the present invention, there is provided an electronic device comprising a processing unit and a storage unit, wherein the storage unit stores position data including storage region information indicating each storage region of a plurality of data stored in the storage unit. A writing in which the processing unit in the information storage medium is written in association with identification information for identifying the position data from an external device and a plurality of storage areas indicated by the storage area information included in the position data identified by the identification information. When a data write command including embedded data is received, the write function is configured to function as write means for writing the corresponding write data in the plurality of storage areas.

  According to the present invention, in the data read command or the data write command, the external device sets identification information for identifying position data including storage area information indicating each storage area of a plurality of data to be read or written. By doing so, a plurality of data stored in the storage unit can be read or written in a lump, and the processing time required for these processes can be reduced.

It is a figure which shows the hardware structural example of IC chip 1a mounted in the IC card 1 which concerns on this embodiment. (A) is a figure which shows an example of the file structure of IC chip 1a which concerns on this embodiment, (B) is a figure which shows an example of EF203b which concerns on this embodiment, (C) is this figure It is a figure which shows an example of EF203c which concerns on a form. It is a figure which shows an example of EF203a which concerns on this embodiment. (A) is a figure which shows the example of the conventional read command, (B), (C) is a figure which shows the example of the batch read command which concerns on this embodiment. It is an example of the flowchart which shows the process at the time of the batch read command reception by CPU10 which concerns on this embodiment. (A) is a figure which shows the example of the conventional write command, (B), (C) is a figure which shows the example of the batch write command which concerns on the modification 1. FIG. 10 is an example of a flowchart illustrating a batch write command reception process performed by a CPU according to a first modification. It is a figure which shows an example of EF203a which concerns on the modification 5.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The embodiment described below is an embodiment when the present invention is applied to an IC card on which an IC chip is mounted.

[1. Outline of Configuration and Function of IC Chip 1a]
First, with reference to FIG. 1, the configuration and functional outline of the IC chip 1a mounted on the IC card 1 according to the present embodiment will be described. FIG. 1 is a diagram illustrating a hardware configuration example of an IC chip 1 a mounted on the IC card 1. The IC card 1 is used as a cash card, credit card, point card, employee card or the like. Alternatively, the IC card 1 is incorporated into a communication device such as a smartphone or a mobile phone. Alternatively, the IC chip 1a may be directly incorporated on the circuit board of the communication device. The IC chip 1a is an example of the electronic information storage medium of the present invention.

  As shown in FIG. 1, the IC chip 1 a includes a CPU (Central Processing Unit) 10, a RAM (Random Access Memory) 11, a ROM (Read Only Memory) 12, a nonvolatile memory 13, and an I / O circuit 14. Composed. The CPU 10 is a processor (computer) that executes various programs stored in the ROM 12 or the nonvolatile memory 13. The I / O circuit 14 serves as an interface with the external device 2. As a result, the IC chip 1a can communicate with or without contact with the external device 2 including the IC reader / writer. In the case of the contact type IC chip 1a, the I / O circuit 14 includes, for example, eight terminals C1 to C8. For example, the C1 terminal communicates with the power supply terminal (terminal for supplying power to the IC chip 1a), the C2 terminal with the reset terminal, the C3 terminal with the clock terminal, the C5 terminal with the ground terminal, and the C7 terminal with the external device 2. Terminal. On the other hand, in the case of the non-contact type IC chip 1a, the I / O circuit 14 includes, for example, an antenna and a modulation / demodulation circuit. Examples of the external device 2 include an IC card issuing machine, ATM, ticket gate, and authentication gate. Alternatively, when the IC chip 1a is incorporated in a communication device, the external device 2 corresponds to a control unit responsible for the function of the communication device.

  For example, a flash memory is applied to the nonvolatile memory 13. A part of various programs and data stored in the nonvolatile memory 13 may be stored in the ROM 12. The nonvolatile memory 13 may be “Electrically Erasable Programmable Read-Only Memory”. In the present embodiment, the programs stored in either the ROM 12 or the nonvolatile memory 13 include an operating system (hereinafter referred to as “OS”), application programs, and the like.

  Here, the application program is a program for realizing an application instance function (in other words, a module) in the IC card 1. Thereby, the CPU 10 realizes the function of the application.

  The nonvolatile memory 13 stores files for storing various applications and data. Specifically, as shown in FIG. 2A, MF201, DF202a, 202b (collectively referred to as DF202) and EF203a to 203e (collectively referred to as EF203) are stored. The MF 201 is a file that is the basis of the file structure of the IC chip 1a. The DF 202 is a file that is arranged below the MF 201 and stores applications and the like. The EF 203 is a file that is arranged below the DF 202 and stores various data. In some cases, an EF is arranged directly under the MF (for example, EF203a). Each data file is given an identifier (in FIG. 2A, identifiers are written to the right of “MF”, “DF”, and “EF”).

  Next, the EF 203b and the EF 203c to which the identifiers “6F01” and “6F02” are assigned will be described with reference to FIGS. The EF 203b and the EF 203c are record organization files and are organized by a plurality of records (the EF may be organized by only one record).

  As shown in FIG. 2B, the EF 203b is organized by four records. The first record (record number “1”) 301 has “personal ID”, the second record (record number “2” record) 302 has “name”, and the third record (record number “3” record). ) 303 stores “Birthplace (prefecture)”, and the fourth record (record with record number “4”) 304 stores information indicating “date of birth”. Note that the record lengths (Length) of the first record 301 to the fourth record 304 are all 10 bytes.

  Further, as shown in FIG. 2C, the EF 203c is organized by four records. Information indicating “home address” in the first record 311, “home phone number” in the second record 312, “work address” in the third record 313, and “work phone number” in the fourth record 314 Are stored respectively. The record lengths (Length) of the first record 311 to the fourth record 314 are all 20 bytes.

  Thus, for example, personal information of the owner of the IC card 1 is stored in the EF 203b and the EF 203c. Each information can be specified by a combination of a file identifier and a record number. For example, the information “name” can be specified by the combination of the identifier “6F01” and the record number “2”.

  Next, the EF 203a to which the identifier “2F01” is assigned will be described with reference to FIG. The EF 203a is organized by a plurality of records 351 to 353 similarly to the EF 203b and the EF 203c. As shown in FIG. 3, each record of the EF 203a describes one or more combinations of file identifiers and record numbers. For example, information “6F01 01 6F02 03 6F02 04” is stored in the first record 351 of the EF 203a, and among these, “6F01 01” indicates the “personal ID” that is the first record of the EF 203b (6F01). Similarly, “6F02 03” indicates “work address” which is the third record of EF203c (6F02), and “6F0204” is the fourth record of EF203c (6F02) “ "Work phone number". Each of the records 351 to 353 included in the EF 203a (2F01) is set by the issuer when the IC card 1 is issued.

  Hereinafter, the EF 203a (2F01) is referred to as a “batch instruction file”, and each record included in the “batch instruction file” is referred to as “batch instruction data”.

[2. Read command]
Next, a read command (command for reading data stored in the IC card 1) transmitted from the external device 2 to the IC card 1 will be described. Here, a case where the external device 2 reads the following records (1) to (3) is used as a specific example.
(1) EF203b (6F01) first record (2) EF203c (6F02) third record (3) EF203c (6F02) fourth record

When data (1)-(3) is read using a command conforming to the conventional international standard ISO / IEC 7816-4, it is necessary to take the following steps (A)-(E).
(A) Selection of EF203b (6F01) (B) Reading of the first record (C) Selection of EF203c (6F02) (D) Reading of the third record (E) Reading of the fourth record

  As described above, in the conventional method, it is necessary to transmit a selection command in (A) and (C), and to transmit a read command in (B), (D), and (E), and a total of five commands are transmitted. It will be. In addition, if the EF 203b (6F01) and the EF 203c (6F02) are assigned a shortened file ID defined in the international standard, the file and the record can be specified at the same time, so the processes (A) and (C) are unnecessary. However, it is still necessary to transmit three read commands (B), (D), and (E).

  On the other hand, in this embodiment, a batch read command is newly provided, and the processes (A) to (E) are realized as one process.

  FIG. 4A is a diagram illustrating an example of a conventional read command. A value indicating a “READ RECORD” command is stored in “INS” (1 byte), a record number of a record to be read is stored in “P1 (parameter 1)” (1 byte), and “P2 (parameter 2) ) "(1 byte) stores a value indicating that a read target is designated by a record number.

  FIG. 4B is an example (example 1) of the batch read command. “INS” stores a value indicating a “READ RECORD” command, “P1 (parameter 1)” stores a record number of batch instruction data (record) used for batch reading, and “P2 (parameter 2)”. Stores a value indicating batch reading.

  When the CPU 10 of the IC chip 1a in Example 1 receives a batch read command storing a value indicating that batch reading is performed in “P2” from the external device 2, the batch instruction data included in the EF 203a (2F01) in FIG. Collective instruction data specified by the record number stored in “P1” is acquired (a record in which one or more combinations of file identifiers and record numbers are described). Next, the CPU 10 acquires all the corresponding records based on each combination of the identifier and the record number of the file described in the acquired batch instruction data, concatenates them, and batches them to the external device 2. Sent as a response to a read command.

  FIG. 4C is an example (example 2) of the batch read command. “INS” stores a value indicating a batch read command, “P1 (parameter 1)” stores a record number of batch instruction data (record) used for batch reading, and “P2 (parameter 2)” is used. do not do.

  When the CPU 10 of the IC chip 1a in Example 2 receives a command in which a value indicating a batch read command is stored in “INS” from the external device 2, the CPU 10 stores the EF 203a (2F01) in FIG. Collected batch instruction data (records in which one or more combinations of file identifiers and record numbers are described) that are identified by the record number stored in “P1” are acquired. Next, the CPU 10 acquires all the corresponding records based on each combination of the identifier and the record number of the file described in the acquired batch instruction data, concatenates them, and batches them to the external device 2. Sent as a response to a read command.

[3. Processing when batch read command is received by CPU 10]
Next, the batch read command reception process by the CPU 10 of the IC chip 1a will be described with reference to FIG. The batch read command reception process is executed when the IC chip 1a receives a batch read command (the command shown in FIG. 4B or FIG. 4C) from the external device 2.

  First, when receiving a batch read command, the CPU 10 selects a batch instruction file (EF203a (2F01) in FIG. 3) (step S101).

  Next, the CPU 10 reads a record (batch instruction data) designated by “P1” of the batch read command among the records included in the batch instruction file selected in the process of step S101 (step S102).

  Next, the CPU 10 acquires a combination of a file identifier and a record number from the batch instruction data read out in the process of step S102 (step S103). The process of step S103 is executed for the number of combinations described in the batch instruction data in the loop process of steps S103 to S109. However, every time the CPU 10 executes the process of step S103, the batch instruction data is executed. Each combination of the file identifier and record number described in (1) is acquired in order from the top.

  Next, the CPU 10 selects a file corresponding to the file identifier acquired in the process of step S103 (step S104).

  Next, the CPU 10 determines whether or not the file has been selected in the process of step S104 (step S105). At this time, if the CPU 10 determines that the file could not be selected (step S105: NO), it outputs an error response to the external device 2 (step S111), and ends the batch read command reception process.

  On the other hand, if the CPU 10 determines that the file has been selected (step S105: YES), the CPU 10 selects a record that is included in the file and that corresponds to the record number acquired in step S103 (step S103). S106).

  Next, the CPU 10 determines whether or not a record has been selected in the process of step S106 (step S107). At this time, if the CPU 10 determines that the record could not be selected (step S107: NO), it outputs an error response to the external device 2 (step S111), and ends the batch read command reception process.

  On the other hand, if it is determined that the record can be selected (step S107: YES), the CPU 10 reads the selected record and temporarily stores it in the RAM 11 or the nonvolatile memory 13 (step S108).

  Next, the CPU 10 determines whether or not all combinations of file identifiers and record numbers described in the batch instruction data have been acquired (step S109). At this time, if the CPU 10 determines that all combinations of file identifiers and record numbers have not been acquired (step S109: NO), the process proceeds to step S103.

  On the other hand, if the CPU 10 determines that all the combinations of file identifiers and record numbers have been acquired (step S109: YES), the CPU 10 concatenates the records temporarily stored in the process of step S108 and outputs them as a response to the external device 2. (Step S110), the batch read command reception process is terminated.

  As described above, the IC chip 1a of the present embodiment includes the CPU 10 (an example of a “processing unit”) and the nonvolatile memory 13 (an example of a “storage unit”), and the nonvolatile memory 13 is included in the nonvolatile memory 13. Batch instruction data (an example of “location data”) including a combination of a file identifier and a record number (an example of “storage area information”) indicating each storage area of a plurality of stored records (an example of “data”) When the CPU 10 receives a batch read command (an example of “data read command”) including a record number (an example of “identification information”) of batch instruction data used for batch read from the external device 2, Each of a plurality of storage areas indicated by a combination of a file identifier and a record number included in the batch instruction data identified by the record number Collectively records stored and transmits to the external device 2.

  Therefore, according to the IC chip 1a of the present embodiment, the external device 2 uses the batch read command to collect batch instruction data including a combination of a file identifier and a record number indicating each storage area of a plurality of records to be read. By setting the record number for identifying the plurality of records, a plurality of records stored in the nonvolatile memory 13 can be read at once, and the processing time required for this processing can be shortened.

[4. Modified example]
Next, a modification of the above embodiment will be described. Note that the modifications described below can be combined with the above-described embodiment and other modifications as appropriate.

[4.1. Modification 1]
In the above-described embodiment, a case has been described in which a batch read command is provided and a plurality of records are read in batch. It is good.

[4.1.1. Write command]
First, the case where the external device 2 writes in the following records (1) to (3) will be described as a specific example.
(1) EF203b (6F01) first record (2) EF203c (6F02) third record (3) EF203c (6F02) fourth record

When writing data (1)-(3) using a command conforming to the conventional international standard ISO / IEC 7816-4, the following steps (A)-(E) must be taken.
(A) Selection of EF203b (6F01) (B) Writing of the first record (C) Selection of EF203c (6F02) (D) Writing of the third record (E) Writing of the fourth record

  As described above, in the conventional method, it is necessary to transmit a selection command in (A) and (C), and to transmit a write command in (B), (D), and (E), so a total of five commands are transmitted. It will be. In addition, if the EF 203b (6F01) and the EF 203c (6F02) are assigned a shortened file ID defined in the international standard, the file and the record can be specified at the same time, so the processes (A) and (C) are unnecessary. However, it is still necessary to transmit three read commands (B), (D), and (E).

  On the other hand, in Modification 1, a new batch write command is provided, and the processes (A) to (E) are realized with one command.

  FIG. 6A shows an example of a conventional write command. “INS” stores a value indicating the “UPDATE RECORD” command, “P1 (parameter 1)” stores the record number of the record to be written, and “P2 (parameter 2)” stores the record number. Stores a value indicating that a write target is specified.

  FIG. 6B is an example (Example 1) of a batch write command. “INS” stores a value indicating an “UPDATE RECORD” command, “P1 (parameter 1)” stores a record number of batch instruction data (record) used for batch writing, and “P2 (parameter 2)”. ”Stores a value indicating batch writing. In “Lc (record length)”, the length of “DATA” is described. In “DATA”, data (write data) to be written in each record to be written is described continuously. For example, in the case where the first record 301 (personal ID) of EF203b (6F01) and the third record 313 (working address) of EF203c (6F02) are to be written, the first byte from “DATA” is the 10th byte. The personal ID to be written in is described, and the work address to be written in the 11th to 30th bytes of “DATA” is described.

  When the CPU 10 of the IC chip 1a receives a batch write command storing a value indicating batch write to “P2” from the external device 2, the batch command data included in the batch instruction file EF203a (2F01) is used. Therefore, collective instruction data specified by the record number stored in “P1” is acquired. Next, the CPU 10 selects each corresponding record based on the information indicating the combination of the identifier and record number of the file described in the acquired batch instruction data, and is described in “DATA” of the batch write command. Write the write data.

  FIG. 6C is an example (example 2) of the batch write command. “INS” stores a value indicating a batch write command, “P1 (parameter 1)” stores a record number of batch instruction data (record) used for batch writing, and “P2 (parameter 2)” do not use. In “Lc (record length)”, the length of “DATA” is described. In “DATA”, data (write data) to be written in each record to be written is described continuously.

  When the CPU 10 of the IC chip 1a receives a command in which a value indicating a batch write command is stored in “INS” from the external device 2, it is included in the batch instruction file EF203a (2F01) as in the case of Example 1. Collective instruction data specified by the record number stored in “P1” is acquired. Next, the CPU 10 selects each corresponding record based on the information indicating the combination of the identifier and record number of the file described in the acquired batch instruction data, and is described in “DATA” of the batch write command. Write the write data.

[4.1.2. Processing when batch write command is received by CPU 10]
Next, the batch write command reception process by the CPU 10 of the IC chip 1a will be described with reference to FIG. The batch write command reception process is executed when the IC chip 1a receives a batch write command (command shown in FIG. 6B or FIG. 6C) from the external device 2.

  First, when receiving a batch write command, the CPU 10 selects a batch instruction file (EF203a (2F01) in FIG. 3) (step S201).

  Next, the CPU 10 reads a record (batch instruction data) designated by “P1” of the batch read command among the records included in the batch instruction file selected in the process of step S201 (step S202).

  Next, the CPU 10 acquires a combination of a file identifier and a record number from the batch instruction data read out in the process of step S202 (step S203). The process of step S203 is executed by the number of combinations described in the batch instruction data in the loop process of steps S203 to S210, but the CPU 10 executes the batch instruction data every time the process of step S203 is executed. Each combination of the file identifier and record number described in (1) is acquired in order from the top.

  Next, the CPU 10 selects a file corresponding to the file identifier acquired in the process of step S203 (step S204).

  Next, the CPU 10 determines whether or not a file has been selected in the process of step S204 (step S205). At this time, if the CPU 10 determines that the file could not be selected (step S205: NO), it outputs an error response to the external device 2 (step S212), and ends the batch write command reception process.

  On the other hand, if the CPU 10 determines that the file has been selected (step S205: YES), the CPU 10 acquires the record length of the selected file (step S206). For example, when the selected file is EF203b (6F01), the record length “10 bytes” is acquired.

  Next, the CPU 10 selects a record included in the file selected in step S204 and corresponding to the record number acquired in step S203 (step S207).

  Next, the CPU 10 determines whether or not a record has been selected in the process of step S207 (step S208). At this time, if the CPU 10 determines that the record could not be selected (step S208: NO), it outputs an error response to the external device 2 (step S212), and ends the batch write command reception process.

  On the other hand, when it is determined that the record has been selected (step S208: YES), the CPU 10 writes the write data described in “DATA” of the batch write command (step S209). As described above, in the “DATA” of the batch write command, the write data to be written to each record is described continuously with the record length of the record. The processing of step S209 is executed by the number of combinations described in the batch instruction data in the loop processing of step S203 to step S210, but each time the CPU 10 executes the processing of step S209, “10” of the batch write command is executed. A plurality of write data described in “DATA” are written in order from the top for each record length acquired in the process of the previous step S206.

  Next, the CPU 10 determines whether or not all combinations of file identifiers and record numbers described in the batch instruction data have been acquired (step S210). At this time, if the CPU 10 determines that all combinations of file identifiers and record numbers have not been acquired (step S210: NO), the process proceeds to step S203.

  On the other hand, when it is determined that all combinations of file identifiers and record numbers have been acquired (step S210: YES), the CPU 10 outputs a normal end response to the external device 2 (step S211), and receives a batch write command. The process ends.

  As described above, the IC chip 1a of the present embodiment includes the CPU 10 (an example of a “processing unit”) and the nonvolatile memory 13 (an example of a “storage unit”), and the nonvolatile memory 13 is included in the nonvolatile memory 13. Batch instruction data (an example of “location data”) including a combination of a file identifier and a record number (an example of “storage area information”) indicating each storage area of a plurality of stored records (an example of “data”) The CPU 10 stores the record number (an example of “identification information”) of the batch instruction data used for batch reading from the external device 2, and the identifier and record number of the file included in the batch instruction data identified by the record number. A batch write command (“data write”) that includes write data to be written in association with each of the plurality of storage areas indicated by When receiving one example) of a command ", to the plurality of storage areas, and writes the corresponding the write data.

  Therefore, according to the IC chip 1a of the present embodiment, the external device 2 uses the batch write command to include batch instruction data including a combination of a file identifier and a record number indicating each storage area of a plurality of records to be written. By setting the record number for identifying the data, it is possible to write in a plurality of records stored in the non-volatile memory 13 at a time, and the processing time required for this processing can be shortened.

[4.2. Modification 2]
In the above embodiment, there is only one batch instruction file EF203a (2F01) in FIG. 3, and the CPU 10 receiving the batch read command performs batch read based on the records included in EF203a (2F01). . Instead, in Modification 2, a plurality of batch instruction files are provided.

  Specifically, first, a shortened file ID (5 bits) defined in ISO / IEC 7816-4 is assigned to each of a plurality of batch instruction files. In the batch read command of FIG. 4C, the shortened file ID is described in “P2” (not used in the above embodiment) to specify which batch instruction file is used. Then, the CPU 10 selects the batch instruction file identified by the shortened file ID described in “P2” in the process of step S101 in FIG.

  In the above embodiment, since the IC chip 1a can hold only one collective instruction file, it is not possible to store collective instruction data that is more than the number of records (255) that can be stored in the collective instruction file. . In the second modification, a maximum of 30 batch instruction files can be provided by adopting the shortened file ID (the shortened file ID is 5-bit information, and “00000” and “11111” which cannot be used). Therefore, the number of records that can be stored in the IC chip 1a is greatly increased to 7650, and the versatility of the batch read command can be improved.

[4.3. Modification 3]
Each record included in the EF 203a (2F01) may be added, changed, or deleted by the external device 2 in accordance with a predetermined rule. The addition / change / deletion of the record included in the EF 203a (2F01) is executed based on a command received from the external device 2 by the CPU 10. According to the third modification, records that are desired to be batch read or batch write can be set on the external device 2 side, and convenience is improved.

[4.4. Modification 4]
In the above embodiment, the batch instruction file is a record structure file as in EF203a (2F01) of FIG. 3, but when only one batch instruction data is set, the batch instruction file may be a transparent structure. Good.

[4.5. Modification 5]
In the above embodiment, as shown in EF 203a (2F01) in FIG. Since “6F02 03” and “6F02 04” are records included in the same file, an abbreviated description method may be adopted. For example, a combination of “6F02 03” and “6F02 04” may be described as “6F02 03 04” as shown in FIG.

1 IC card 1a IC chip 10 CPU
11 RAM
12 ROM
13 Nonvolatile Memory 14 I / O Circuit 2 External Device

Claims (8)

An electronic information storage medium comprising a processing unit and a storage unit,
The storage unit stores position data including storage area information indicating each storage area of a plurality of data stored in the storage unit,
When the processing unit receives a data read command including identification information for identifying the position data from an external device, each of the plurality of storage areas indicated by the storage area information included in the position data identified by the identification information An electronic information storage medium characterized in that the data stored in is collectively transmitted to the external device. An electronic information storage medium comprising a processing unit and a storage unit,
The storage unit stores position data including storage area information indicating each storage area of a plurality of data stored in the storage unit,
The processing unit includes identification information for identifying the position data from an external device, write data to be written in correspondence with each of a plurality of storage areas indicated by storage area information included in the position data identified by the identification information, An electronic information storage medium that writes the corresponding write data to each of the plurality of storage areas when a data write command including is received. The electronic information storage medium according to claim 1 or 2,
When the processing unit receives a command indicating that the position data is added, changed, or deleted from the external device, the processing unit adds, changes, or deletes the position data according to the command. Electronic information storage medium.   An IC card comprising the electronic information storage medium according to any one of claims 1 to 3. A data transmission method in an electronic information storage medium comprising a processing unit and a storage unit,
The storage unit stores position data including storage area information indicating each storage area of a plurality of data stored in the storage unit;
When the processing unit receives a data read command including identification information for identifying the position data from an external device, each of the plurality of storage areas indicated by the storage area information included in the position data identified by the identification information Sending the data stored in the above to the external device together;
A data transmission method comprising: A data writing method in an electronic information storage medium comprising a processing unit and a storage unit,
The storage unit stores position data including storage area information indicating each storage area of a plurality of data stored in the storage unit;
The processing unit writes identification data for identifying the position data from an external device, and write data to be written corresponding to each of a plurality of storage areas indicated by the storage area information included in the position data identified by the identification information; And writing the corresponding write data to the plurality of storage areas when receiving a data write command including:
A data writing method comprising: A processing unit and a storage unit, wherein the storage unit in the electronic information storage medium stores position data including storage area information indicating each storage area of a plurality of data stored in the storage unit;
When a data read command including identification information for identifying the position data is received from an external device, the data is stored in each of a plurality of storage areas indicated by the storage area information included in the position data identified by the identification information. Transmitting means for collectively transmitting data to the external device;
A data transmission program characterized in that it functions as A processing unit and a storage unit, wherein the storage unit in the electronic information storage medium stores position data including storage area information indicating each storage area of a plurality of data stored in the storage unit;
A data write command including identification information for identifying the position data from an external device, and write data to be written in association with a plurality of storage areas indicated by the storage area information included in the position data identified by the identification information Writing means for writing the corresponding write data in the plurality of storage areas, respectively,
A data writing program characterized by functioning as:

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