JPH0371290A - Ic card - Google Patents

Abstract

PURPOSE:To improve security for the personal identification of an owner himself by converting hand-written document data indicating the owner himself from the analog data into digital data and storing and comparing the digital data. CONSTITUTION:When a comparing hand-written character for personal identification is written in a hand-written character analog input part 13, a CPU control part 14 extracts a feature such as the order of making strokes or shapes of the hand-written character and stores the extracted feature in a memory part 15. Then, the CPU control part 14 discriminates similarity between the reference hand-written character image of the owner-himself which is stored at the time of initializing and the comparing hand-written character image inputted at present. In this case, the order of making strokes of the hand-written character, its shape or the like is referred. Consequently, the security for personal identification can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an IC card used for personal identification at a financial institution or the like.

[Conventional technology]

IC card refers to an integrated circuit (IC) in the broadest sense, but usually refers to an OCIB International Standards Organization compliant card. Since ISO-compliant cards have a built-in microcomputer and relatively large-capacity memory, their use is attracting attention in many fields such as medical institutions.

Since IC cards can store a great deal of information within their memory, it is often necessary to take measures to prevent information leakage.

As such a method for so-called owner identification, a method using a personal identification number is generally used.

[Problem to be solved by the invention]

However, if a four-digit number is used as a PIN number for conventional IC cards, such as magnetic cards, the number can be determined simply by looking up the person's date of birth or home phone number. In many cases, there was a safety issue if the card was handed over to another person. Furthermore, if the number of digits in the PIN number is set to be larger than this, security will be improved, but there is a problem in that it becomes difficult for the person in question to memorize the number.The purpose of the present invention is to solve this problem.
The purpose is to provide C cards.

[Means to solve the problem]

The IC card of the present invention includes a handwritten character analog data input section for inputting handwritten character analog data, and an analog-to-digital converter for converting the handwritten character analog data inputted into the handwritten character analog data input section into digital data. a storage unit that stores a conversion output of an analog-to-digital converter regarding reference handwritten character analog data input as identification reference data to the handwritten character analog data input unit; The apparatus further includes a comparison section that compares the conversion output of the analog-to-digital converter regarding comparison handwritten character analog data inputted as comparison data to the reference data stored in the storage section.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a perspective view of an IC card showing an embodiment of the present invention. The IC card 10 of this embodiment has a magnetic stripe 11 arranged therein for consistency with conventional magnetic cards. Further, an interface section 12 consisting of contacts for connection to an external device and a handwritten character analog input section 13 as an input section for identity verification are arranged on the card surface. FIG. 2 is a block diagram showing the circuit configuration of the IC card shown in FIG. 1 connected to an external device. This external device 20 is connected to the interface section 12 with the IC card 10 set therein. The interface unit 12 is a CPU
(Central processing unit) Connected to the control unit 14 and transmits necessary data to the external device 20,
Receive data sent from 0. CPU control unit 1
4 is equipped with a ROM that stores internal programs,
CPU control unit 14 that controls this IC card 10
is also connected to a memory section 15 and an AD (analog-digital) conversion section 16.

The memory unit 15 temporarily stores data required by the CPU control unit 14 in the process of control, and stores data for identity verification, which will be explained later, and data to be stored in the card. The AD conversion section 16 performs AD conversion on the analog data input from the handwritten character analog input section 13 and supplies the converted data to the CPU control section 14 as digital data. Here, the handwritten character analog input section 13 of this embodiment is constituted by a two-dimensional image sensor.The two-dimensional image sensor of this embodiment has the same size as the signature field of a normal magnetic card, for example, 53 am It has a rectangular size of 9 mm x 9 mm. Note that the IC card 10 of the present invention includes a power supply section (not shown) inside, and the power supply section supplies power for operating the IC card 10. Now, when the IC card 10 of this embodiment is initialized, the reference handwritten characters of the card owner are collected from the handwritten character analog input section 13.

FIG. 3 is a flowchart for explaining the operation of initializing the IC card shown in FIG. 1. The operation of initializing the IC card 10 in the 0th order will be explained. First, when a reference handwritten character is written on the analog input section 13 with a thin, hard writing instrument or a finger (not shown), the CPU control section 14 inputs the handwritten character on the analog input section 13 at a predetermined timing. to read the image, and read the reference handwritten character image (step ■>0) Next, the reference handwritten character image is determined in the AD converter 16 by determining a threshold value from the input analog data. , and binarize it into digital data (step ■).Next, the CPU control unit 14 processes this reference handwritten character digital data to extract features such as the stroke order and shape of the handwritten characters. ■), this is the memory part 1
5 is stored as digital data (step ■)
.

FIG. 4 is a flow chart for explaining the operation when using the initialized IC card of FIG. 1.

First, the IC card 10 is connected to the external device shown in FIG. As a result, when handwritten characters for comparison for identity verification are written on the handwritten character analog input section 13 with a thin, hard writing instrument or a finger (not shown), the CP
The U control unit 14 instructs the handwritten character analog input unit 13 to read an image at a predetermined timing, and reads an image of the handwritten character for comparison (step). Next, the handwritten character image for comparison is supplied to the AD converter 16,
The data is binarized to create digital data (step ■). Next, the CPU control section 14 extracts the features such as stroke order and shape of the handwritten characters (step (2)), and temporarily stores them in the memory section 15 as digital data (step (2)). Next, the CPU control unit 14 determines the similarity between the reference handwritten character image of the owner stored at the time of initialization and the comparison handwritten character image input this time (step ■). For example, the stroke order and shape of handwritten characters are used as a reference.If the results of this discrimination do not match, the IC card 10 stops operating and the external device 20
It is also possible to send no signal to the external device 20, or to send information that the determination results do not match.0 If the determination results match, normal signal transmission and reception to the external device 20 is started. This determination result will be used, for example, to determine whether or not a cash withdrawal is appropriate at a financial institution or the like. FIG. 5 is a perspective view of an IC card showing another embodiment of the present invention. The IC card 30 of this embodiment has a magnetic stripe 11, an interface section 12, a handwritten character analog input section 13, and a liquid crystal display section 17 arranged on the card surface. A liquid crystal display section 17 is arranged directly below 13. FIG. 6 is a block diagram showing a circuit configuration when the IC card 30 shown in FIG. 5 is connected to the external device 20. This IC card 30 is
As shown in the figure, it is composed of an interface section 12, a CPU control section 14, a memory section 15, an AD conversion section 16, a handwritten character analog input section 13, and a liquid crystal display section 17. FIG. 7 is a flowchart for explaining the operation when using the initialized IC card of FIG. 5. Next, the operation when using this IC card 30 will be explained. First, when handwritten characters for comparison are written on the handwritten character analog input section 13 using a writing instrument with a thin and hard tip or a finger (not shown), the CPU control section 14 inputs the handwritten character analog input unit 13 at a predetermined timing. Instruct the input unit 13 to read the image and read the image of handwritten characters for comparison (step ■) 0 Next, the image of handwritten characters for comparison is AD
The data is supplied to the converter 16 and binarized to create digital data (step ■).Next, the CPU controller 14
Step (2) displays the image of this handwritten character in its original form on the liquid crystal display unit 17, and further extracts the features such as stroke order and shape of this handwritten character (step (2)), and digitally stores this image in the memory unit 15. The image is temporarily stored as data (step 2), and then the CPU control unit 14 determines the similarity with the image of the owner himself stored at the time of initialization (step 2). This embodiment has the advantage that when inputting handwritten characters, the characters inside the handwritten characters are displayed on the liquid crystal section 17, making it easier to input them. In addition, the handwritten character analog input section 13 may use a transparent touch sensor or the like so that the handwritten characters displayed on the liquid crystal display can be seen, and the shape may be a normal magnetic one to make it easier to write with a finger. It is larger than the signature field on the card, for example, 53 am x 30 + u+. As described above, the IC card according to the present invention has the advantage that there is no chance of the IC card being stolen because it can be compared with registered symbols etc. by writing handwritten characters on the IC card itself instead of the conventional PIN number. be.

〔Effect of the invention〕

As explained above, according to the present invention, handwritten character data representing the owner is converted from analog data to digital data and stored, and this is compared. Since a person's famous name or an arbitrary figure can be used in place of the password, security for verifying the owner's identity can be improved. Moreover, since the IC card itself has a processing function for identity verification, the data will not be leaked to the outside, and security will be improved in this sense as well. Furthermore, since the identity verification is performed on the IC card side, there is also the advantage that the burden on the external device is reduced.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an IC card showing an embodiment of the present invention;
Figure 2 is a block diagram showing the circuit configuration of the IC card in Figure 1 connected to an external device, and Figure 3 is a block diagram of the IC card in Figure 1.
FIG. 4 is a flowchart for explaining the operation of initializing the card, FIG. 4 is a flowchart for explaining the operation when operating the initialized IC card of FIG. 1, and FIG. 5 is another embodiment of the present invention. A perspective view of an IC card showing an example, Fig. 6 is a block diagram showing the circuit configuration when the IC card shown in Fig. 5 is connected to an external device, and Fig. 7 is an operation of the initialized IC card shown in Fig. 5. FIG. 2 is a flow chart for explaining the operation when 10.30... IC card, 11... Magnetic stripe, 12... Interface unit, 13... Handwritten character analog input unit, 14... CPU control unit, 15...
Memory section, 16... AD conversion section, 17... Liquid crystal display section, 20... External device.

Claims (1)

[Claims] a handwritten character analog data input section for inputting handwritten character analog data; an analog-to-digital converter for converting the handwritten character analog data inputted into the handwritten character analog data input section into digital data; a storage unit that stores the conversion output of the analog-to-digital converter for reference handwritten character analog data input as identification reference data to the data input unit; An IC card comprising: a comparison section that compares a conversion output of an analog-to-digital converter regarding handwritten character analog data for comparison with reference data stored in the storage section.