JPH04329495A - Processor for information card - Google Patents

Abstract

PURPOSE:To prevent a card from being illegally used by any person except a proper card user. CONSTITUTION:In a CPU to judge the IC card as the proper card with a built-in EEPROM to store the plural groups of personal identification numbers in the IC card, the IC card is judged as proper one when the plural groups of personal identification numbers inputted through the number keys of a collating machine are totally coincident with the plural groups of personal identification numbers in the EEPROM of the IC card. Thus, even when the IC card is lost or stolen, the card is prevented from being illegally used, and the effect of improving safety is obtained.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processing device for determining whether an information card is valid or invalid in an information card system.

0002

2. Description of the Related Art FIG. 4 is an operational flowchart of a conventional IC card verification system. In the figure, 1 is the operation of inserting the IC card into the verification machine as a processing device, 2 is the operation of the card user inputting the PIN number into the verification machine, and 3 is the operation of inputting the input PIN number and the PIN number in the IC card. 4 is an operation of comparing and branching within the IC card, 4 is an operation where the comparison machine judges how many times the comparison result is NG and branching, 5 is a data processing operation performed by the IC card and the collation machine, 6
is an operation in which the IC card is ejected from the verification machine.

FIG. 5 is a functional block diagram of an IC card that stores various information as an information card. In the figure, 7 is a Vcc terminal, 8 is a GND terminal, 9 is a reset terminal, 10 is a clock terminal, and 11 is an I/O terminal, and these terminals perform input/output with the outside. 12 is a CPU as a determining means
, 13 is a ROM that stores a program for executing the processing flow of the verification machine, 14 is a RAM that temporarily stores data, that is, a password input to the verification machine, and 15 is an EEPROM that stores data, that is, the password. (
programmable memory), 16 is an input/output control circuit that controls data input/output with the outside, and 17 is a bus connecting each functional block. The EEPROM 15 is provided with a bit string b for decoding and storing the password. For example, if the password is 4 digits, 16 bits are used. Also,
A similar bit string b is also provided in the RAM 14. The bit values of the EEPROM 15 can be electrically erased or rewritten.

The next operation will be explained with reference to the flowchart in FIG. First, step 1 is to insert the IC card into the card insertion slot of the verification machine. Next, Figure 4
IC card verification consisting of steps 2 to 4 is performed. In this IC card verification operation, the card user inputs a personal identification number into the verification machine via an input means such as a number key (step 2). Next, the entered PIN is shared between the PIN stored in the EEPROM 15 in the IC card and the CPU.
12 (step 3).

[0005] If the result is OK, the IC card is recognized as valid and the process proceeds to the next data processing (step 5). Moreover, if the result is NG, the flow (step 4) of returning to step 2 is performed a certain fixed number of times. Then, if the processing is completed or fails a certain number of times or more, the card is ejected from the insertion slot (step 6).

[0006]

[Problem to be Solved by the Invention] Since the conventional IC card verification system is configured as described above, even if the card user is an unauthorized person, if the PIN number is somehow known to an unauthorized person, the card will be destroyed. There was a problem that it could be misused.

[0007] This invention was made in order to solve the above-mentioned problems, and provides an information card processing device that prevents the card from being used illegally by anyone other than the authorized card user. It is intended for this purpose.

[0008]

[Means for Solving the Problems] An information card processing device according to the present invention has a built-in memory for storing a plurality of sets of PIN numbers in the information card, and the determining means for determining the information card as a proper card is provided in the processing device. The information card is determined to be proper when the plurality of sets of passwords input through the password input means all match the plurality of sets of passwords stored in the memory of the information card.

[0009]

[Operation] The information card processing device according to the present invention cannot be used unless a plurality of sets of passwords match, thereby increasing security against misuse of the card when the card is lost or stolen.

0010

[Example] Example 1. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an operational flowchart of the IC card verification system of the present invention. Note that the same reference numerals as those in FIG. 4 of the conventional example indicate the same or corresponding parts, and explanations thereof will be omitted. In the figure, 18 is the action of the card user inputting the first set of PIN numbers, and 19 is the input of the first set of PIN numbers and the IC.
20 is an operation in which the card user inputs the second set of PIN numbers, and 21 is an operation in which the second set of PIN numbers entered and the IC card are compared. 22 is an operation in which the card user inputs the m-th set of PIN numbers, and 23 is an operation in which the input m-th set of PIN numbers is compared with the PIN number in the IC card. This is an operation of comparing and branching within the IC card.

FIG. 2 is a functional block diagram of an IC card as an information card of the present application. Note that the same reference numerals as in FIG. 5 of the conventional example indicate the same or corresponding parts. In the figure, 12A is a CPU as a determination means, 13A is a ROM that stores a program for causing a collation machine as a processing device to execute the flow operation shown in FIG. It is EEPROM (programmable memory). Memory cells are arranged in a matrix in this EEPROM 15A, and one horizontal column (or one vertical column) constitutes a bit string a, a, . . . for storing a set of password numbers. A password is stored in each bit string a, a, . . . , and a plurality of sets of passwords are stored in the EEPROM 15A.

Next, the operation will be explained with reference to the flowchart shown in FIG. First, step 1 is to insert the IC card into the card insertion slot (insertion section) of the collation machine. Next, IC card verification consisting of steps 4, 18 to 23 in FIG. 1 is performed. In this IC card verification operation, the card user inputs the first set of PIN numbers into the verification machine via an input means such as a number key (step 18) (at this time, the PIN number is decoded and written into the bit string of the RAM 14). ). Next, the entered PIN is combined with the PIN stored in the EEPROM 15A in the IC card.
It is compared in U12A (step 19).

[0013] If the result is OK (at this time,
An interrupt signal is output to CPU12A, and CPU12A
clears the bit string in RAM14. ), the card user enters the second set of PIN numbers into the verification machine (step 2).
0). Next, the input PIN is used as the PIN stored in the IC card and the CPU 12 as in the first set above.
A is compared (step 21). If the result is OK, the card user inputs the mth set of the personal identification number into the verification machine (step 22). Next, the input PIN number is compared with the PIN number stored in the IC card in the same manner as described above by the CPU 12A (step 23).

[0014] If the result is OK, it means that all m sets of input PIN numbers match the PIN numbers stored in the EEPROM 15A, and the IC card is recognized as legitimate and the next data processing is performed. Proceed to (Step 5)
. Further, if the comparison result is NG, steps 19, 21,
23, the flow (step 4) of returning to steps 18, 20, and 22 a certain number of times is performed. Then, if the processing is completed or fails a certain number of times or more, the card is ejected from the insertion slot (step 6).

[0015] In the above embodiment, the order in which the PIN numbers are input is also determined, and the EEPRO in which the PIN numbers are stored is
Each address of M15A is sent to the CPU 12 according to the input order.
If you specify A, you can also check the order in which you entered your PIN. In addition, if the CPU 12A checks the PIN number input into the RAM 14 against each of the multiple sets of PIN numbers stored in the EEPROM 15A, the input order does not matter, and if the PIN numbers match, the PIN numbers are valid. It is determined that

Example 2. In the above embodiment, a comparison is made each time one set of PIN numbers is input, but as shown in the operation flowchart of FIG. 3, m sets of PIN numbers are input (step 2
4) and compare m sets of PIN numbers at the same time (step 25)
), which produces the same effect as the above embodiment. In this case, the RAM 14 is also provided with the same number of bit strings as the EEPROM 15A, and the password is stored all at once.
If the CPU 12A controls the addresses of the corresponding bit strings in the AM 14 and the EEPROM 15A, the input order can also be checked.

[0017] In the above embodiment, the information card is I
Although the C card is taken as an example, the present invention can also be applied to an information card using a magnetic bubble memory or the like.

[0018]

As described above, according to the information card processing device of the present invention, the information card has a built-in memory for storing a plurality of sets of PIN numbers, and the determining means for determining the information card as a proper card is capable of processing The information card is determined to be valid when the plurality of sets of PIN numbers input through the PIN input means of the device all match the plurality of sets of PIN numbers stored in the memory of the information card. In addition, when an information card is lost or stolen, the card will not be misused, and safety will be improved.

[Brief explanation of drawings]

FIG. 1 is an operation flowchart of an IC card verification system as an information card processing device according to an embodiment of the present invention.

FIG. 2 is a functional block diagram of an IC card according to an embodiment of the present invention for performing the flow of FIG. 1;

FIG. 3 is an operation flowchart of an IC card verification system showing another embodiment of the present invention.

FIG. 4 is an operation flowchart of a conventional IC card verification system.

FIG. 5 is a functional block diagram of a conventional IC card.

[Explanation of symbols]

12A CPU (determination means) 15A EEPROM (memory)

Claims (1)

[Claims] Claim 1: When an information card storing various information is inserted into an input section of a main body of a processing device and judged as a proper card by a determining means, the processing device performs predetermined processing based on the various information. In the information card processing device configured to carry out the processing, the information card has a built-in memory for storing a plurality of sets of PIN numbers, and the determining means is configured to store a plurality of sets of PIN numbers input through the PIN input means of the processing device. An information card processing device characterized in that the information card is determined to be proper when the number all matches a plurality of sets of password numbers stored in the memory of the information card.