JPS62231357A - Ic card checking method - Google Patents

Abstract

PURPOSE:To protect an IC card from a crime, such as forgery, or theft, etc., by checking a password number at an IC card side, and checking a secret proper number at a reader/writer side. CONSTITUTION:At the IC card side, a check between the password number stored at a ROM, and the password number sent from a reader/writer is performed. As a result, when a coincidence is obtained between them, it is decided that the presenter of the IC card is a principal. Next, at the IC card side, the secret proper number stored at the ROM is read out, and it is outputted to the reader/writer side. At the reader/writer side, the check between the secret proper number stored at the ROM and the proper number sent from the IC card side, is performed. As a result of check, when the coincidence is obtained, it is decided that the IC card itself is a true card. In this way, it is possible to protect the IC card from the crime, such as the forgery, or the theft, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to an IC card containing an IC chip therein, and more particularly to an IC card verification method for determining the validity of its use.

2. Prior Art Regarding the concept of this IC card and its construction method, see, for example, "Electronic Memory Cards: Related Technologies" by Ball Parmenter, IMC 1.
982 Newsletter, Tokyo, May 24-26, 1982
PP439-445 [Paul Parmentie
r:Electronic Memory Card
：Technologies around it”
IMC1982Proceedings, .

Tokyo, May 24-26.1982 PP, 4
39-445].

In a system using this IC card, it is necessary to construct a highly secure system that is protected from crimes such as forgery and ingestion of IC cards. In other words, determining the validity of the IC card itself, such as whether or not it is genuine,
Any system may be sufficient as long as it determines the legitimacy of the person using the IC card, such as whether or not the person is the owner of the IC card, and permits the transaction only when the authenticity is confirmed.

Several proposals have been proposed so far as this IC card verification method.

A conventional IC card verification method will be described below with reference to the drawings.

4 and 5 are flowcharts of a conventional IC card verification method.

First, FIG. 4 shows an IC card verification method disclosed in Japanese Patent Publication No. 53-6491 "Identification Card". According to this method, the PIN number entered from the reader/writer is
After being input to the C card, it is subjected to certain arithmetic processing and then output as a new identification signal. The reader/writer side has the same arithmetic processing function as an IC card, and after performing certain arithmetic processing on the input PIN number, the result is compared with the new identification signal sent from the IC card. This configuration outputs a signal for permitting or prohibiting the use of the IC card.

Next, FIG. 5 shows an IC card verification method disclosed in Japanese Patent Publication No. 60-9308 "Electronic Card". According to this method, the IC card side reads the PIN number written in the read-only memory (hereinafter simply referred to as ROM) and checks the PIN number sent from the reader/writer against the PIN number. , is configured to output a signal for permitting or prohibiting the use of an IC card.

Problems to be Solved by the Invention As mentioned above, it is extremely important to protect IC cards from crimes such as forgery and ingestion.
Various methods are being proposed for checking C cards.

In the above-mentioned method of subjecting the PIN number to a certain calculation process and then outputting it as a new identification signal, even when an appropriate value is input to the IC card, a new identification signal that has been subjected to a certain calculation process is output. is output, and if you repeat this operation several times, I
It is possible to analyze certain arithmetic processing inside a C card, and there is a problem in that it is easy to forge an IC card that has the same arithmetic processing function.

In addition, in the method of verifying the PIN number on the IC card side and outputting a signal for permitting or prohibiting the use of the IC card,
There are only two types of card output: a use permission signal and a prohibition signal. For example, by inputting an appropriate value, a use prohibition signal can be output, and from this the IC card use permission signal can be inferred. The problem is that the correct PIN number can be easily determined by manually generating the PIN number one after another using a device that automatically generates the PIN number one after another, and by observing the output from the IC card.

The present invention has been made in view of the above points, and provides an IC card that has a simple configuration, cannot be forged, and can provide a highly secure IC card that cannot be used illegally even if ingested. This is a card verification method.

Means for Solving the Problems In order to solve the above problems, the present invention provides an IC card consisting of an IC card in which an IC chip is embedded in an insulating base material, and a reader/writer that exchanges information with the IC card. In the personal verification method in the system, the IC card has a means for storing a PIN number unique to the holder and a unique number that is secret to the holder, and a means to verify the PIN number and send a permission or prohibition signal depending on the result. and a means for outputting the unique number only when a permission signal is generated. means for storing a secret unique number; and means for comparing the unique number output from the IC card with the unique number stored in the reader/writer and generating a permission or prohibition signal according to the result. An IC card verification method is provided.

According to the above-described configuration, the present invention verifies the PIN number on the IC card side to determine whether the person presenting the IC card is genuine, and verifies the unique number that is secret to the owner on the reader/writer side. Since the IC card itself is determined to be genuine or not, it is impossible to forge it, and even if it is ingested, it cannot be used unexpectedly, making it possible to obtain a highly secure IC card. I can do it.

EXAMPLE Hereinafter, an example of the IC card verification method of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view of an IC card conforming to the 130 standard, FIG. 2 is a block diagram of an electronic circuit section embedded inside the IC card, and FIG. 3 is a plan view of an IC card according to an embodiment of the present invention. 3 is a flowchart showing a card verification method.

In FIG. 1, 1 is an IC card, and 2 is a magnetic stripe used in conventional Turret cards and the like. 3 is an IC module embedded in the IC card 1 and has an IC chip embedded therein, and 4 is an electrode terminal for connection to an external circuit. In Figure 2,
4,1 is for power supply, 3.2 is for reset signal, 3.3 is for clock, 3,4 is for reserve, 3.5 is for ground, 3.6 is for program power supply, 3.7 is for data input. 3.8 is an electrode terminal for output and 3.8 is for backup. 5 is a microcomputer consisting of a central processing unit (hereinafter simply referred to as CPU), ROM, etc., and 6 is a programmable ROM (hereinafter simply referred to as FROM).

The operation of the IC card verification method of this embodiment configured as described above will be described below with reference to the flowchart shown in FIG.

First, when the IC card verification processing operation starts, the IC card
The person presenting the card inputs the PIN number from the reader/writer using a keypad or the like. At this time, the IC card side reads out the PIN number stored in its internal ROM to cI) U, and then the CPU compares the PIN number sent from the reader/writer with the PIN number read from the ROM. conduct.

As a result, if no match is found, IC card use prohibition information is output, and all input and output is prohibited. If a match is found, it is determined that the person presenting the IC card is the person in question, and the secret unique number stored in the ROM inside the IC card is read out and output to the reader/writer. The unique number referred to here may be unique to an institution that handles IC cards, or may be unique to an IC card manufacturer. When the IC card side is verifying the PIN number, the reader/writer side is reading out the secret unique number stored in the internal ROM, and the unique number sent from the IC card is read out on the reader/writer side. Verify with. As a result, if no match is found, IC card use prohibition information is output, and all input and output is prohibited. If a match is found, it is determined that the IC card itself is genuine, the IC card use permission information is output, and after the verification process is completed, the IC card is authenticated.
A transaction using the card begins.

As described above, according to this embodiment, after the IC card side verifies the PIN number to determine whether or not the presenter of the IC card is the principal, the reader/writer side issues a secret unique number. It is determined whether the IC card itself is genuine by comparing the information, thereby providing a highly secure IC card system that can protect against crimes such as counterfeiting and ingestion of IC cards. can do.

Effects of the Invention As described above, according to the present invention, the simple structure makes it impossible to forge an IC card, prevents unauthorized use even if an IC card is taken, and improves safety. It is possible to obtain an extremely high-quality IC card, which is extremely useful in practice.

[Brief explanation of drawings]

Figure 1 is a plan view of an IC card that complies with ISO standards, Figure 2
The figure is a block diagram of an electronic circuit section embedded inside an IC card, FIG. 3 is a flowchart showing an IC card verification method according to an embodiment of the present invention, and FIGS. 4 and 5 are a block diagram of a conventional IC card. It is a flowchart of a verification method. 1...IC card, 2...(11 Ki Strife, 3...IC module, 4...
... Electrode terminal, 4.1 ... Electrode terminal for power supply, 4
．． 2...Reset signal electrode terminal, 4,3...
...Clock electrode terminal, 4,4...Spare electrode terminal, 4.5...Grounding electrode terminal, 4.6.
...Program power supply electrode terminal, 4.7...
... Data input/output electrode terminal, 4.8... Spare electrode terminal, 5... Microcomputer, 6
・・・・・・Programmable ROM. Name of agent: Patent attorney Toshio Nakao 1 person f--1 C-L゛? ---Membership straf 4-2--Ribbit iF-AgencyP Shu=Book-H63-Fig. 4Fig. 5

Claims (1)

[Claims] In a personal verification method in an IC card system consisting of an IC card with an IC chip embedded in an insulating base material and a reader/writer that exchanges information with the IC card, the IC card has a PIN number unique to its owner. and a means for storing a unique number that is secret to the owner; a means for comparing the above-mentioned PIN number and generating a permission or prohibition IL signal depending on the result; and a means for storing the above-mentioned unique number only when the permission signal is generated. The reader/writer is provided with a means for the holder of the IC card to input a personal identification number, and a means for storing a secret unique number for the holder;
An IC card characterized by comprising means for comparing the unique number output from the IC card with the unique number stored in the reader/writer and generating a permission or prohibition signal according to the result. Matching method.