JPS62164186A - Ic card collating method - Google Patents

Abstract

PURPOSE:To make impossible the forgery of an IC card, to prevent an improper use even when it is stolen, and to improve security by collating a password number specified for its owner at an IC card side, and checking it at a reader/ writer side only when they coincide. CONSTITUTION:When the collating process operation of an IC card 1 is started, the presenter of the card 1, first of all, inputs the password number to the reader/writer. Next, at the card 1 side, the password number stored in a ROM within a microcomputer 5 is read out to a CPU, and a collating between the password number sent from the reader/writer is performed. As a result, it is decided that the presenter of the card 1 is its owner only when they coincide, and a result is outputted after a prescribed arithmetic process is applied on the password number. And at the reader/writer side, the collating between the password number sent from the IC card and the password number inputted by a card presenter is performed, and when coincidence between them is obtained, the information to permit the usage of the card is outputted. In this way, the forgery of the card is impossible, and the improper use of the card can be prevented even when it is stolen, thereby the security is improved.

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 parmenti
er:”BIecLronic MemoryCar
d:Technologies around it"1Mc 19B2Proce
edings, Tokyo, May 24-26.198
2 PP, 439-445].

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 a verification method for this IC card.

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 shown in Japanese Patent Publication No. 53-6491 entitled "Identification Card." According to this method, a password input from a reader/writer is input into an IC card, 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 a 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 Patent Publication No. 1988-9308 "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 C-card verification methods.

In the method described above, in which the PIN number is output as a new identification signal after being subjected to certain arithmetic processing, even when an appropriate value is input to the IC card, a new identification signal that has been subjected to certain arithmetic processing 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 password can be easily determined by inputting the password one after another using a device that automatically generates the password and observing the output from the IC card.

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

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 system in the system, the IC card has a means for storing a personal identification number unique to its owner, a means for verifying the identification number and generating a match or mismatch signal depending on the result, and a means for generating a match signal. The IC card holder is provided with a means for outputting the PIN after performing certain arithmetic processing on the PIN only when the PIN is generated; After the arithmetic processing has been carried out, the IC card is compared with the PIN number sent from the IC card which has been subjected to certain arithmetic processing, and according to the result, a means is provided to output a signal for permitting or prohibiting the use of the IC card. This provides a unique IC card verification method.

Effect of the present invention With the above-described configuration, the IC card side verifies the holder's unique PIN number, and only when they match, the PIN number is subjected to a certain arithmetic processing, and then the reader/writer side performs the above-mentioned certain arithmetic processing. By verifying the PIN number that has been subjected to arithmetic processing, it is possible to determine whether the person presenting the IC card is the person in question and whether the IC card itself is genuine, thereby preventing counterfeiting. It is possible to obtain a highly secure IC card that cannot be used illegally even if it is ingested.

Embodiment Hereinafter, an IC card verification method according to an embodiment 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 ISO 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 credit cards. 3 is embedded in the IC card 1 and contains tC
This is an IC module in which a chip is embedded, and 4 is an electrode terminal for connection to an external circuit. In Fig. 2, 41 is for power supply, 32 is for reset signal, 33 is for clock, 34 is for reserve, 35 is for ground, 36 is for program power, 37 is for data output, and 38 is for reserve. It is an electrode terminal. 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 explained 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, on the IC card side, the PIN number stored in the internal ROM is read out to the CPU, and then the CPU compares the PIN number sent from the reader/writer with the PIN number read from the ROM.

As a result, if no match is found, IC card use prohibition information is output, and all input and output is prohibited. - If a loss is obtained, it is determined that the presenter of the IC card is the person in question, and the above-mentioned PIN number is subjected to certain arithmetic processing and output. The arithmetic processing here may be specific to an institution that handles IC cards, or may be specific to an IC card manufacturer. During this time, the reader/writer side performs certain arithmetic processing on the PIN number input by the person presenting the IC card, and then compares it with the PIN number sent from the IC card that has undergone arithmetic processing inside the IC card. Perform verification. As a result, if no match is found, information on prohibiting the use of the IC card is output,
Prohibit all input/output. I if a match is found
After determining that the c-card itself is genuine, outputting IC card usage permission information, and completing the verification process, transactions using the IC card are started.

As described above, according to this embodiment, the IC card side verifies the holder's unique PIN number, and only if they match, the PIN number is subjected to certain arithmetic processing, and then the reader/writer side performs the above-mentioned PIN number. By verifying the PIN number that has undergone certain arithmetic processing, it is possible to determine whether the person presenting the IC card is the person in question and whether the IC card itself is genuine. It can protect against crimes such as forgery and ingestion of IC cards,
A highly secure IC card system can be provided.

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 conforming to the 130 standard;
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 conventional tC It is a flowchart of a card verification method. 1...IC card, 2...magnetic stripe, 3...IC module, 4...
Electrode terminal, 41...Electrode terminal for power supply, 42...
...Reset signal electrode terminal, 43...Clock electrode terminal, 44...Spare electrode terminal,
45... Bridge terminal for grounding, 46... Electrode terminal for program tijlX, 47... Electrode terminal for data input/output, 48... Spare electrode Terminal, 5...Microcomputer, 6...
・Programmable ROM. Name of agent: Patent attorney Toshio Nakao (1 person) Figure 3 Figure 4

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. means for storing the PIN number, means for collating the PIN number and generating a match or mismatch signal depending on the result, and outputting the PIN number after performing certain arithmetic processing only when a matching signal is generated. The reader/writer is provided with a means for the holder of the IC card to enter a PIN number, and a PIN code sent from the IC card after being subjected to a certain calculation process. I, characterized in that it comprises a means for checking the PIN code given and outputting a signal for permitting or prohibiting the use of the IC card according to the result.
How to check C card.