JP2012164121A - Portable electronic device, information processing method, and ic card - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable electronic device and an information processing method of which data write-in efficiency is excellent.SOLUTION: A portable electronic device includes communication means, first storage means, and write-in means. The communication means communicates with an information processor to receive first and second write-in data. The first storage means stores the first and second write-in data. The write-in means configures first write-in unit data by first control information showing the existence of the second write-in data, the first write-in data associated with the first control information, second control information showing the existence of the first write-in data, and the second write-in data associated with the second control information and writes the first write-in unit data to the first storage means.

Description

  Embodiments described herein relate generally to a portable electronic device, an information processing method, and an IC card.

  In recent years, IC cards (contact IC cards and non-contact IC cards) excellent in safety have been widely used. An IC card (portable electronic device) includes an IC (Integrated Circuit) chip. The IC chip includes a communication I / F for communicating with a reader / writer, an EEPROM capable of retaining data even when power supply is cut off, a control element such as a CPU for executing various operations, a CPU operation program, and the like. A ROM for storing data and a RAM for temporarily storing data are provided.

  IC cards are used not only for settlement of credit cards, commuter passes, and other commercial transactions, but also in various fields as ID cards for employee cards, membership cards, insurance cards, and the like. Compared to the conventional magnetic card, the IC card has an IC chip having a CPU, ROM, RAM, EEPROM, etc., so that various functions can be realized, and furthermore, forgery is difficult. This is due to the significant improvement in terms.

  The IC card described above executes various processes based on various commands transmitted from the reader / writer. For example, there is a command for executing a writing process for writing data to the EEPROM.

  Here, writing of data to the EEPROM will be briefly described. For example, the unit of writing data to the EEPROM is called a page. That is, data is written to the EEPROM in page units. For example, one page is 128 bytes, and the time required to write data for one page is 2 msec. The time required to write 1 byte per page and the time required to write 128 bytes per page are approximately the same 2 msec.

Japanese Laid-Open Patent Publication No. 05-15068

  When writing of the first data is requested for a predetermined page of the EEPROM of the IC card, the IC card writes the first data for the predetermined page, and then the second data for the same predetermined page. When data writing is requested, the IC card writes second data to a predetermined page. As described above, when data is written in a plurality of times on the same page, the processing efficiency is low, and improvement of the processing efficiency is demanded.

  An object of the present invention is to provide a portable electronic device, an information processing method, and an IC card that are excellent in data writing efficiency.

  According to the embodiment, the portable electronic device includes a communication unit, a first storage unit, and a writing unit. The communication means communicates with the information processing apparatus and receives the first and second write data. The first storage means stores the first and second write data. The writing means includes first control information indicating the presence of the second write data, the first write data associated with the first control information, and a first control data indicating the presence of the first write data. Second control information and the second write data associated with the second control information constitute first write unit data, and the first write unit data is stored in the first storage means. Write.

1 is a block diagram illustrating a schematic configuration of an IC card (portable electronic device) according to an embodiment. It is a figure which shows an example of the data structure (no control information) memorize | stored in EEPROM. It is a figure which shows an example of the data structure (with control information) memorize | stored in EEPROM. It is a flowchart which shows the 1st example of the data writing process by an IC card. It is a flowchart which shows the 2nd example of the data writing process by an IC card.

  Hereinafter, embodiments will be described with reference to the drawings.

  FIG. 1 is a block diagram illustrating a schematic configuration of an IC card (portable electronic device) according to an embodiment. The IC card 1 is composed of, for example, a plastic card body. As shown in FIG. 1, the card body includes an IC chip (IC module) 100. The IC chip 100 includes a control element (CPU) 101, a ROM 102, A RAM 103, an EEPROM 104, a communication control unit 105, and a power supply unit 106 are provided.

  The ROM 102 is a storage unit and holds an IC card program executed by the control element 101. The RAM 103 is also a storage unit, functions as a working memory, and temporarily stores data. The EEPROM 104 is also a storage means and stores data permanently. The control element 101 operates based on an IC card program or the like stored in the ROM 102. The control element 101 is a reading unit and a writing unit, and reads data stored in the RAM 103 or the EEPROM 104 or writes data to the RAM 103 or the EEPROM 104. For example, the control element 101 temporarily writes data transmitted from the reader / writer (information processing apparatus) to the RAM 103, and writes the data of the RAM 103 to the EEPROM at a predetermined timing. The control element 101 is a command processing unit that interprets and executes a command transmitted from the reader / writer. The communication control unit 105 is a data input / output unit, and receives a command transmitted from the reader / writer or transmits a command execution result to the reader / writer.

  For example, the IC card 1 (communication control unit 105) communicates with a reader / writer (information processing apparatus), receives first and second write data, and the IC card 1 (control element 101) performs second write. Corresponding to first control information indicating the presence of data, first write data associated with the first control information, second control information indicating the presence of the first write data, and second control information The first write unit data is constituted by the attached second write data, and the first write unit data is written to the EEPROM 104. Hereinafter, writing of writing unit data by the IC card 1 will be described.

  First, the EEPROM 104 will be described. For example, a data writing unit of the EEPROM 104 is referred to as a page (writing unit area). That is, data is written to the EEPROM 104 in page units. For example, one page is 128 bytes, and the time required to write data for one page is 2 msec. The time required to write 1 byte per page and the time required to write 128 bytes per page are approximately the same 2 msec.

  FIG. 3 is a diagram illustrating an example of write unit data stored in the EEPROM 104. In FIG. 3, in order to make the address easy to understand for each byte, the second and subsequent digits of the address are shown in hexadecimal on the left end of the column, and the first digit of the address is shown in hexadecimal on the upper end of the row.

  For example, the first data D1, the second data D2, and the third data D3 are data used for a predetermined transaction. In other words, the first data D1, the second data D2, and the third data D3 are data written in one command process executed in a predetermined transaction.

  The IC card 1 (control element 101) performs the first data D1, the second data D2, and the third data D3 on the predetermined page of the EEPROM 104 in order to efficiently process the first data D1, the second data D2, and the third data D3. The data D1, the second data D2, and the third data D3 are written, the first control information C1 corresponding to the first data D1, the second control information C2 corresponding to the second data D2, and The third control information C3 corresponding to the third data D3 is written. The first data D1, the second data D2, the third data D3, the first control information C1, the second control information C2, and the third data written on a predetermined page (the same page) of the EEPROM 104. Data constituted by D3 is referred to as write unit data. That is, the writing unit data is data that can be written to a predetermined page of the EEPROM 104 by one writing process.

  For example, the first control information C1 is 1-byte information associated with the first data D1, and is information indicating the presence or absence of data other than the first data D1 on a predetermined page. For example, when data other than the first data D1 exists on a predetermined page, the first control information C1 includes presence information indicating that data other than the first data D1 exists on the predetermined page. When there is no data other than the first data D1 on the predetermined page, the first control information C1 includes absence information indicating that no data other than the first data D1 exists on the predetermined page. In the case of FIG. 3, for example, the first control information C1 includes presence information indicating the presence of the second data D2 and the third data D3.

  Similarly, for example, the second control information C2 is 1-byte information associated with the second data D2, and is information indicating the presence or absence of data other than the second data D2 on a predetermined page. For example, when data other than the second data D2 exists on a predetermined page, the second control information C2 includes presence information indicating that data other than the second data D2 exists on the predetermined page. When there is no data other than the second data D2 on the predetermined page, the second control information C2 includes absence information indicating that no data other than the second data D2 exists on the predetermined page. In the case of FIG. 3, for example, the second control information C2 includes presence information indicating the presence of the first data D1 and the third data D3.

  Similarly, for example, the third control information C3 is 1-byte information associated with the third data D3, and is information indicating the presence or absence of data other than the third data D3 on a predetermined page. For example, when data other than the third data D3 exists on a predetermined page, the third control information C3 includes presence information indicating that data other than the third data D3 exists on the predetermined page. When there is no data other than the third data D3 on the predetermined page, the third control information C3 includes absence information indicating that no data other than the third data D3 exists on the predetermined page. In the case of FIG. 3, for example, the third control information C3 includes presence information indicating the presence of the first data D1 and the third data D2.

  FIG. 4 is a flowchart showing a first example of data writing processing by the IC card 1. Here, for example, a data writing process when an IC card is issued will be described.

  The IC card 1 (control element 101) communicates with a reader / writer (hereinafter referred to as an IC card issuing machine), receives first data D1 and first control information C1 from the IC card issuing machine, and the IC card 1 The first data D1 is written to a predetermined page of the EEPROM 104 (ST11). The IC card 1 confirms the first control information C1 (ST12). For example, when the first control information C1 includes related information indicating the relationship between the second data D2 and the third data D3, The IC card 1 determines that other data is stored for the predetermined page (ST13, YES), and the IC card 1 determines the second data D2 and the third data for the first control information C1. Presence information (information indicating the presence of other data) is stored, and the first control information C1 associated with the first data D1 is written to a predetermined page of the EEPROM 104 ( ST14).

  Further, when the IC card 1 (control element 101) receives the second data D2 and the second control information C2 from the IC card issuing machine, the second page D2 is read from the second page with respect to a predetermined page of the EEPROM 104 as described above. Data D2 and second control information C2 are written (ST16). That is, the IC card 1 confirms the second control information C2. For example, when the second control information C2 includes related information indicating the relationship between the first data D1 and the third data D3, the IC card 1 The card 1 determines that other data is stored for the predetermined page, and the IC card 1 determines the presence of the first data D1 and the third data D3 with respect to the second control information C2. Presence information (information indicating that other data is stored) is stored, and second control information C2 associated with the second data D2 is written to a predetermined page of the EEPROM 104.

  Further, when the IC card 1 (the control element 101) receives the third data D3 and the third control information C3 from the IC card issuing machine, the third page is read from the predetermined page of the EEPROM 104 in the same manner as described above. Data D3 and third control information C3 are written (ST16). That is, the IC card 1 confirms the third control information C3. For example, when the third control information C3 includes related information indicating the relationship between the first data D1 and the second data D2, the IC card 1 The card 1 determines that related information is already stored on a predetermined page, and the IC card 1 is present to indicate the presence of the second data D2 and the third data D3 with respect to the third control information C3. Information (information indicating that other data is stored) is stored, and the third control information C3 associated with the third data D3 is written to a predetermined page of the EEPROM 104.

  When the IC card 1 receives all the write data from the IC card issuer and finishes writing all the write data (write unit data), the data writing process by the IC card 1 is completed.

  The IC card receives the first data D1 and the first control information C1 from the IC card issuing machine, and the IC card 1 writes the first data D1 to a predetermined page of the EEPROM 104 (ST11). The IC card 1 confirms the first control information C1 (ST12). For example, if the first control information C1 does not include related information indicating a relationship with other data, the IC card 1 The IC card 1 determines that no other data is stored for the page (ST13, NO), and the IC card 1 does not store any other data with respect to the first control information C1 (no other data is stored). And the first control information C1 associated with the first data D1 is written to a predetermined page of the EEPROM 104 (ST15).

  In the above, based on the first control information C1, the second control information C2, and the third control information C3 transmitted from the IC card issuing machine, the IC card 1 is placed on a predetermined page (the same page) of the EEPROM 104. On the other hand, write unit data composed of the first data D1, the second data D2, the third data D3, the first control information C1, the second control information C2, and the third control information C3 is written. I explained that. However, the present embodiment is not limited to such writing.

  For example, based on the data size of the first data D1, the second data D2, and the third data D3 transmitted from the IC card issuer and the data size of one page of the EEPROM 104, the IC card 1 When it is determined that the writing unit can be configured by the data D1, the second data D2, the third data D3, the first control information C1, the second control information C2, and the third control information C3, the IC card 1 Are the first data D1, the second data D2, the third data D3, the first control information C1, the second control information C2, and the third control for a predetermined page (the same page) of the EEPROM 104. You may make it write the write unit data comprised by the information C3.

  If the IC card 1 determines that the writing unit can be configured by the first data D1, the second data D2, the first control information C1, and the second control information C2, the first data D1 When the data size of the second data D2 and the third data D3 is determined to be larger than the data size of one page), the first data D1 and the second data for the first page of the EEPROM 104 The first write unit data composed of the data D2, the first control information C1, and the second control information C2 is written. Further, when the IC card 1 determines that the write unit can be configured by the third data D3 and the third control information C3 (determined that the data size of the third data D3 is smaller than the data size of one page). In this case, the second write unit data composed of the third data D3 and the third control information C3 is written into the second page of the EEPROM 104.

  Further, when the IC card 1 determines that the writing unit can be configured by the first data D1 and the first control information C1, the data size of the first data D1 and the second data D2 is one page. If the data size is larger than the data size, and if the data size of the first data D1 and the third data D3 is also larger than the data size of one page) The first write unit data composed of the data D1 and the first control information C1 is written. Furthermore, when the IC card 1 determines that the writing unit can be configured by the second data D2 and the second control information C2, the data size of the first data D1 and the second data D2 is one page. When the second data D2 and the third data D3 are determined to be larger than the data size of the first page), the second data D2 and the third data D3 are larger than the data size of the second page. The second write unit data composed of the data D2 and the second control information C2 is written. Further, when the IC card 1 determines that the writing unit can be configured by the third data D3 and the third control information C3 (the data size of the first data D1 and the third data D3 is one page). Larger than the data size and when the data size of the second data D2 and the third data D3 is also larger than the data size of one page) The third write unit data composed of the data D3 and the third control information C3 is written.

  Alternatively, the IC card 1 performs the following operation on the predetermined page of the EEPROM 104 based on an instruction to write the first data D1, the second data D2, and the third data D3 from the IC card issuer to the predetermined page. Write unit data composed of first data D1, second data D2, third data D3, first control information C1, second control information C2, and third control information C3 is written. Also good.

  FIG. 5 is a flowchart showing a second example of data writing processing by the IC card 1. Here, for example, a data writing process at the time of IC card operation (during transaction) will be described.

  For example, the IC card 1 uses the first data D1 # based on a write request for the first data D1 # corresponding to the first data D1 from the reader / writer (hereinafter, IC card processor) (ST21, YES). Is stored (saved) in the RAM 103 (ST22), and the content of the first control information C1 associated with the first data D1 stored in the predetermined page of the EEPROM 104 is confirmed (ST23).

  The IC card 1 determines that other data is stored on the predetermined page based on the first control information C1 (ST24, YES), and further corresponds to the second data D2 from the IC card processor. When there is a write request for the second data D2 # (ST25, YES), the second data D2 # is also stored (saved) in the RAM 103 (ST26), and the second data stored in a predetermined page of the EEPROM 104 is stored. The content of the second control information C2 associated with D2 is confirmed (ST27).

  The IC card 1 determines that other data is stored on the predetermined page based on the second control information C2 (ST28, YES), and further corresponds to the third data D3 from the IC card processor. When there is a write request for the third data D3 #, the third data D3 # is also stored (saved) in the RAM 103, and the third data D3 # associated with the third data D3 stored in the predetermined page of the EEPROM 104 is stored. The content of the control information C3 is confirmed (ST29).

  When the IC card 1 determines that no other data is stored on the predetermined page, the first data D1 #, the second data D2 #, and the third data stored in the RAM 103 are written once. D3 # is written in a predetermined page of the EEPROM 104 (ST30). For example, in the IC card 1, the first data D1, the second data D2, and the third data D3 stored in a predetermined page of the EEPROM 104 are replaced with the first data D1 # and the second data D3 by one writing. Data D2 # and third data D3 # are written.

  When there is no write request for the second data D2 # corresponding to the second data D2 from the IC card processor (ST25, NO), the IC card 1 is stored in the RAM 103 by a single write. The first data D1 # thus written is written in a predetermined page of the EEPROM 104. For example, the IC card 1 writes the first data D1 # in place of the first data D1 stored in a predetermined page of the EEPROM 104 by one writing.

  Further, when there is no request for writing the third data D3 # corresponding to the third data D3 from the IC card processor, the IC card 1 stores the first data stored in the RAM 103 by one writing. Data D1 # and second data D2 # are written in a predetermined page of EEPROM 104. For example, the IC card 1 writes the first data D1 # and the second data D2 # in place of the first data D1 and the second data D2 stored in a predetermined page of the EEPROM 104 by one writing. .

  As described above, the IC card 1 can efficiently write data to the EEPROM 104 by referring to the control information.

  For example, as shown in FIG. 2, when the first data D1, the second data D2, and the third data D3 are stored for a predetermined page of the EEPROM without the control information, the IC card 1 is based on a write request for the first data D1 # corresponding to the first data D1 from the IC card processor, and writes the first data D1 # to a predetermined page of the EEPROM in one write. Next, based on a write request for the second data D2 # corresponding to the second data D2 from the IC card processor, the second data D2 for a predetermined page of the EEPROM is written once. Next, based on a write request for the third data D3 # corresponding to the third data D3 from the IC card processor, a third write is performed on a predetermined page of the EEPROM with one write. Data D # Will be written, with respect to one page, is generated, the processing time is bad more than once of writing.

  On the other hand, as shown in FIG. 3, the IC card 1 includes the first control information C1, the second control information C2, and the third control information C3 with respect to a predetermined page of the EEPROM. In order to write the data D1, the second data D2, and the third data D3, the first data D1 #, the second data D2 #, and the third data D3 # are efficiently written to the EEPROM 104 by one writing. Can write. Therefore, the IC card 1 can reduce the data writing time and the overall processing time.

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

DESCRIPTION OF SYMBOLS 100 ... IC chip (IC module), 101 ... Control element (CPU), 102 ... ROM, 103 ... RAM, 104 ... EEPROM, 105 ... Communication control part, 106 ... Power supply part

Claims (10)

Communication means for communicating with the information processing apparatus and receiving the first and second write data;
First storage means for storing the first and second write data;
First control information indicating the presence of the second write data, the first write data associated with the first control information, second control information indicating the presence of the first write data, And writing means for configuring the first write unit data by the second write data associated with the second control information, and writing the first write unit data to the first storage means ,
A portable electronic device comprising:   2. The portable device according to claim 1, wherein the writing unit configures the first writing unit data based on an instruction from the information processing apparatus, and writes the first writing unit data to the first storage unit. Possible electronic device.   The writing means has first rewrite data and second rewrite data for the storage area of the first write unit data in the first storage means based on the first and second control information. The portable electronic device according to claim 2, wherein the information is written in one writing process.   In response to the write request for the first rewrite data, the writing means waits for the write of the first rewrite data based on the first control information and responds to the write request for the second rewrite data. The portable electronic device according to claim 3, wherein the first rewrite data and the second rewrite data are written in one write process. A second storage means for temporarily storing the first rewrite data and the second rewrite data;
The writing means temporarily writes the first rewrite data and the second rewrite data to the second storage means, and then writes the first write unit data of the first storage means. 5. The portable electronic device according to claim 4, wherein the first rewrite data and the second rewrite data are written to the storage area in one write process.   6. The write unit according to claim 3, wherein the writing unit writes the first rewrite data in place of the first write data, and writes the second rewrite data in place of the second write data. The portable electronic device as described. The first storage means is composed of an EEPROM,
The portable electronic device according to claim 6, wherein the second storage unit includes a RAM.   8. The portable electronic device according to claim 7, wherein the writing means writes the first write unit data in a write unit area of the EEPROM. Communicating with the information processing device, receiving the first and second write data;
First control information indicating the presence of the second write data, the first write data associated with the first control information, second control information indicating the presence of the first write data, And an information processing method in which first write unit data is constituted by the second write data associated with the second control information, and the first write unit data is written to a memory. An IC card composed of a card body in which an IC module is embedded,
The IC module is
Communication means for communicating with the information processing apparatus and receiving the first and second write data;
First storage means for storing the first and second write data;
First control information indicating the presence of the second write data, the first write data associated with the first control information, second control information indicating the presence of the first write data, And writing means for configuring the first write unit data by the second write data associated with the second control information, and writing the first write unit data to the first storage means ,
IC card with

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