JPH11312223A - Ic card and ic card reader/writer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an IC card provided with the writing area of a flag capable of determining the validity of data at the time of utilizing internal data of the IC card and an IC card reader, capable of reading and writing internal data of the IC card. SOLUTION: When an IC card 1 is inserted into an IC card reader/writer part 2, a flag provided inside of the IC card 1 is read, first. The state of the IC card 1 is discriminated by the value of the flag. After finishing the writing of data into the IC card 1, a flag for normal finish is written into the IC card 1. The effect of reading the eject flag of the IC card makes it possible to determine whether the IC card is forcedly ejected in the middle of writing data determine the possibility that internal data of the IC card may partially be defective or abnormal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an IC card and an IC card.
The present invention relates to a C card reader / writer, and more particularly, to an IC card that can determine the validity of data when using internal data of the IC card, and an IC card reader / writer that can read and write the internal data of the IC card.

[0002]

2. Description of the Related Art An 8-bit CPU and a data memory (EE)
An IC card, which is a plastic card having a built-in PROM and having six to eight external connection terminals, has begun to be used in various fields such as finance, health care and welfare, administration, distribution, transportation, ID use, and communication.

In a conventional IC card 11, as shown in FIG. 5, a CPU 13 controls an IC card reader / writer section 12 to read / write (read / write) internal data of the IC card 11.

The IC card 11 can be forcibly ejected from the IC card read / write device B at any time by using an emergency eject.

[0005]

However, the conventional IC card and IC card reader / writer device can forcibly eject data while writing data in the IC card. However, there is a problem that it is impossible to determine whether the read data is valid.

[0006] Therefore, in order to solve the above-mentioned problems, the present invention provides an IC having a flag write area for judging the validity of data when using internal data of an IC card.
It is an object of the present invention to provide a card and an IC card reader / writer device capable of reading or writing internal data of the IC card.

[0007]

Therefore, in order to achieve the above object, the IC card according to the present invention has an area for writing an ejection flag for discriminating whether or not a forced ejection has been performed in an internal memory. Features.

An IC card reader / writer device includes an IC card provided with an area for writing an ejection flag for determining whether or not a forced ejection has been performed in an internal memory, and an IC card for reading or writing internal data of the IC card. A card reader / writer unit, and control means for controlling reading or writing of internal data of the IC card, detecting a value of an eject flag written in the IC card, and determining whether or not an abnormal end is performed according to the value. A display for displaying a warning message when the control means detects an abnormal end.

[0009]

Next, an IC card according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows an IC card and an IC according to the present invention.
FIG. 2 is a schematic configuration diagram showing an embodiment of a card reader / writer device, FIG. 2 is a diagram showing an internal logical configuration of an IC card according to the present invention, and FIG.
FIG. 4 is an operation flowchart when data is written to the IC card according to the present invention when inserted into the card reader / writer device.

An IC card according to an embodiment of the present invention
As shown in FIG. 2, the IC card 1 has an area for writing an ejection flag for determining whether or not the ejection has been forcibly performed. 10, an ejection flag IEF 11 is provided. Here, an ejection flag, which is a flag used for determination, is set to WEF10. That is, a dedicated file (DF) 9 is provided in the IC card 1, and a basic file (WEF) 10 is provided therein as an ejection flag. Based on this, it is possible to determine whether or not the IC card has been forcibly ejected.

The eject flag of the initially issued (unused) IC card 1 is set to "00".

An embodiment of an IC card reader / writer A capable of reading or writing internal data using the IC card 1 will be described.

As shown in FIG. 1, an IC card reader / writer A includes an IC card 1, an IC card reader / writer 2 for reading or writing internal data of the IC card 1, and an internal data of the IC card 1. CPU3, which is control means for controlling the reading or writing of the IC card, detecting the value of the flag written in the IC card 1, and determining whether or not abnormal termination, for example, whether or not the ejection has been forcibly performed, according to the value; The display 4 displays internal data of the card 1 and displays a warning message when the CPU 3 detects abnormal termination.

The operation of the IC card reader / writer of the present invention having such a configuration will be described. First, as shown in FIG. 3, when the IC card 1 is inserted into the IC card reader / writer unit 2 (step 100), the CPU 3 reads an eject flag provided inside the IC card 1 (step 101). The value of the flag is determined (step 102), and if the value is not "02", a warning message is displayed on the display 4 (step 103). If the value is "0
In the case of "2", "01" is written in the eject flag (step 104).

Next, as shown in FIG. 4, data is written to the IC card (step 110). When the data writing is completed (step 111), "02" is written to the eject flag (step 112).

[0017]

As described above, according to the IC card of the present invention, by reading the ejection flag of the IC card, it can be determined whether or not the IC card has been forcibly ejected while data is being written. IC
This has the effect that it can be determined that there is a possibility that the internal data of the card is partially missing or abnormal.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of an IC card and an IC card reader / writer device according to the present invention.

FIG. 2 is a diagram showing a logical configuration inside an IC card according to the present invention.

FIG. 3 is an operation flowchart when an IC card according to the present invention is inserted into an IC card reader / writer device.

FIG. 4 is an operation flowchart when data is written to an IC card according to the present invention.

FIG. 5 is a schematic configuration diagram showing a conventional example of an IC card and an IC card reader / writer device.

[Explanation of symbols]

 A IC card reader / writer device 1 IC card 2 IC card reader / writer unit 3 CPU 4 display

Claims (2)

[Claims] 1. An IC card having an area for writing an ejection flag for determining whether or not a forced ejection has been performed in an internal memory. 2. An IC card having an area for writing an ejection flag for determining whether or not forced ejection has been performed on an internal memory; an IC card reader / writer for reading or writing internal data of the IC card; Control means for controlling the reading or writing of the internal data of the IC card, detecting the value of the eject flag written inside the IC card, and judging whether or not the processing is abnormally terminated according to the value; And a display for displaying a warning message upon detection of an error.