JPH01147791A - Ic card - Google Patents

Abstract

PURPOSE:To confirm a person himself by a card itself by storing previously analog data to express the person himself after converting it into digital data and comparing it. CONSTITUTION:The fingerprint of the processor of a card is picked by pressing the fingerprint part of his thumb upon an analog inputting part 14 at the time of the initialization of the IC card 11. A CPU control part 15 instructs the inputting part 14 to read a picture at prescribed timing, and the image of the fingerprint is read. The image of the fingerprint is sent to an AD converting part 17, and binarized by determining a threshold value from the inputted analog data, and made into the digital data. The control part 15 treats the digital data of the fingerprint part of the thumb, and extracts the curve of the fingerprint, and stores it in a memory part 16. When the person in question is confirmed, the control part 15 decides analogy between the image of the fingerprint of the person himself stored at the time of the initialization and the image of the fingerprint inputted this time.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an IC card suitable for use when verifying identity at a bank or the like, for example.

[Conventional technology]

IC card refers to an integrated circuit (IC) in the broadest sense, but usually refers to an Is○ (International Organization for Standardization) compliant card.

ISO-compliant cards have a built-in microcomputer. And since it has a relatively large memory,
Its use is attracting attention in many fields such as medical institutions and financial institutions. Since an IC card can store a lot of information in its memory, it is often necessary to take measures to prevent information leakage. As methods for so-called identity verification, methods such as using a personal identification number and storing an image of the person's face in memory have been proposed.

[Problem that the invention seeks to solve]

In the former method, for example, 4
When a numeric digit is used as a PIN, the number can often be determined simply by looking up the person's date of birth or home phone number, which poses security issues if the card is handed over to someone else. Furthermore, if the number of digits for the PIN number was set to be larger than this, there was a problem in terms of use, as it would be difficult for the person in question to memorize the number.

In contrast, in the latter method, when an IC card is inserted into a designated device, the person's face is displayed on the device's display, and the person's identity is verified by comparing it with the holder's. There is no need to remember. however,
With this method, identity verification cannot be performed unless the location is equipped with a CRT, image processing device, etc. Additionally, in order to verify the person's identity, it is not easy to verify the person's identity, as it is necessary to remove glasses or, in some cases, a wig.

Therefore, an object of the present invention is to provide an IC card that can perform identity verification using the card itself.

[Means for solving problems]

The present invention includes (i) an analog data input section for inputting analog data; (11) an analog-to-digital converter for converting the analog data input to the analog data input section into digital data; and (iii) an analog data input section. a storage unit that stores the conversion output of the analog-to-digital converter regarding the analog data input as reference data for identification; The IC card is provided with a comparison section that compares the conversion output with data stored in the storage section.

Here, the analog data input unit may be a two-dimensional image sensor that inputs a fingerprint as image data. In this case, data representing the fingerprint is stored in the storage unit, and the person's identity is verified using the image of the fingerprint.

Further, the analog data input section may be a microphone that inputs voice as voiceprint data. In this case, the voiceprint data will be stored in the storage section and used for identity verification.

〔Example〕

The present invention will be described in detail below with reference to Examples.

FIG. 2 shows the appearance of the IC card of this embodiment. The IC card 11 of this embodiment has a magnetic stripe 12 arranged thereon for consistency with conventional magnetic cards. Furthermore, an interface section 13 consisting of contacts for connection to an external device and an analog input section 14 as an input section for identity verification are arranged on the card surface.

FIG. 1 shows the main part of the circuit configuration when this IC card is connected to an external device.

The external device 21 is connected to the interface section 13 with an IC card set therein. The interface unit 13 is connected to a CPU (central processing unit) control unit 15 and transmits necessary data to the external device 21 and receives data sent from the external device 21.

The CPU control unit 15 is a ROM that stores programs internally.
This IC card 11 is controlled. C.P.
The U control section 15 is also connected to a memory section 16 and an AD conversion section 17. The memory section 16 temporarily stores data required by the CPU control section 15 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 unit 17 AD converts the analog data input from the analog input unit 14 and converts it into digital data.
It is supplied to the PU control unit 15. Here, the analog input section 14 of this embodiment is constituted by a two-dimensional image sensor. The two-dimensional image sensor of this example is 1.5cmx
The size is 1 cm.

Now, when the IC card 11 of this embodiment is initialized, the fingerprint of the card holder's thumb is pressed against the analog input section 14 to collect the fingerprint.

This operation will be explained with reference to FIG. The CPU control unit 15 instructs the analog input unit 14 to read the image at a predetermined timing, and the fingerprint image is read (Step 2). The fingerprint image is supplied to the AD converter 17. The AD converter 17 determines a threshold value from the input analog data and binarizes it into digital data (
Step ■). The CPU control unit 15 processes the digital data of the fingerprint portion of the thumb to extract a fingerprint curve (step 2), and stores this in the memory unit 16 as digital data (step 2).

FIG. 4 is for explaining the operation of verifying the identity based on the fingerprint data stored in this manner. When the fingerprint part of the thumb is pressed against the analog input section 14 for identity verification, the CPU control section 15 instructs the analog input section 14 to read out the image, and the fingerprint image is read (step 2). The fingerprint image is supplied to the AD converter 17, where it is binarized and digital data is created (step 2). The CPU control section 15 processes the digital data of the thumb fingerprint portion to extract a fingerprint curve (step 2), and temporarily stores this in the memory section 16 as digital data (step 2).

Thereafter, the CPU control unit 15 determines the similarity between the image of the fingerprint of the person stored at the time of initialization and the image of the fingerprint input this time (step 2). For example, the number of curves per unit length, curvature, etc. are used as a reference. This determination result will be used to determine whether or not a cash withdrawal is appropriate at the bank.

In the embodiments described above, fingerprints were used for identification, but
Of course, other analog data may be used to confirm the identity of the person. For example, analog input section 1
If you configure 4 with a microphone and input audio,
Identity verification □ using voice print becomes possible.

In the embodiment, the analog input section 14 is composed of a two-dimensional image sensor, but it may also be composed of a one-dimensional image sensor, on which the finger is moved to read the image of the fingerprint.

〔Effect of the invention〕

In this way, according to the present invention, analog data representing a person's identity is converted into digital data, stored, and compared, so that even elderly people or people who are inexperienced in operating IC cards can sufficiently verify the person's identity. be able to. Moreover, I
Since the C card itself has a processing function for identity verification, the data is not leaked to the outside, and security is 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 the drawing]

The drawings are for explaining one embodiment of the present invention. Among them, Fig. 1 is a block diagram showing the circuit configuration of the IC card with an external device connected, Fig. 2 is a perspective view of the IC card, FIG. 3 is a flowchart showing the operation of initializing the IC card.
FIG. 4 is a flowchart showing the IC card identity verification operation. 14... Analog input section, 15... CPU control section, 16... Memory, 17... AD conversion section. Applicant: NEC Co., Ltd. NEC Data Equipment Co., Ltd. Agent

Claims (3)

[Claims] 1. An analog data input section that inputs analog data; an analog-digital converter that converts the analog data input to the analog data input section into digital data; and analog data input as identification reference data to the analog data input section. a storage unit that stores the conversion output of the analog-to-digital converter; and a storage unit that stores the conversion output of the analog-to-digital converter regarding the analog data input as comparison data to the analog data input unit, and compares the conversion output of the analog-to-digital converter with the data stored in the storage unit. An IC card characterized by comprising a comparison section that performs the following operations. 2. 2. The IC card according to claim 1, wherein the analog data input section is a two-dimensional image sensor that inputs a fingerprint as image data. 3. 2. The IC card according to claim 1, wherein the analog data input section is a microphone for inputting voice as voiceprint data.