JPH03229289A - Cipher matching device - Google Patents

Abstract

PURPOSE:To prevent a card where a cipher such as a password is stored from being used illegally by prompting an operator to input a cipher of the king corresponding to one kind of cipher selected indefinitely among read cipher and judging whether or not the input cipher matches the read password. CONSTITUTION:When the selected cipher is a cipher A, 'Input the cipher A' is displayed on a display device 5. Mutually different ciphers are stored for ciphers A, B, and C, and the user inputs the password corresponding to the cipher A through a cipher input device 6. When the ciphers match each other, the cipher matching device 3 outputs a cipher coincidence signal and when not, the operation ends. Thus, the cipher matching device 3 prompts the user to input a new cipher every time the inputted cipher matches the selected cipher and when all ciphers are coincident, it is judged that the user is proper, thereby increasing the effect to prevention against illegal use. Consequently, ciphers are prevented from being used in the same pattern at every time and it becomes difficult to use the card illegally.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention is a code verification device for preventing unauthorized use of a card in which a code such as a personal identification number is stored.

[Background Art] In recent years, cards have become popular and are mainly used for cashless transactions. This card stores a code in the PIN book, and the user enters the PIN, and the reader confirms that the stored code matches the input code to confirm normal use. It is designed to make a judgment and process the reception.

[Intelligence WI that the invention attempts to solve] However, there is a problem that if this card falls into the hands of another person and the PIN number is known, the card may be used fraudulently.

[Means for Solving the Problems] In order to solve these problems, the present invention stores a plurality of codes, and allows the machine to randomly select and use one of the codes. be.

5 Effect 1 Since an unspecified code is used among a plurality of codes, it becomes difficult for the codes to match in case of unauthorized use.

[Implementation PA] The figure is a block diagram showing an embodiment of the present invention. In the figure, when the card user sets the card 1, which stores multiple types of codes created in advance based on the user's specifications, into the card reading/accepting device 2, the multiple types of codes stored in the card 1 are read. are all read by the reading device 2 and sent to the code verification device 3. The code matching wave W3 randomly selects one type of code from among the codes supplied according to the random number generated by the random number generator 34, displays the si of the code on the display bag W5, and prompts the user to read the code. Prompt for input.

For example, three types of codes, codes A, B, and C, are stored, and if the selected code is code A, a message "Please input code A" is displayed on the display device 5. Cipher A
, B, and C are stored, and the user inputs the code corresponding to code A from the code input device 6.

If the codes match, the code verification device 3 outputs a code match signal, and if they do not match, the operation ends.

The above is an example of only one time, but the code verification device 3 prompts you to enter a new code each time the input code matches the selected code, and determines that it is normal if all codes match. This will increase the effectiveness of preventing unauthorized use.

[Effects of the Invention] As explained above, the present invention reads out a plurality of codes stored in a card, reads out one type from among them, and uses it in an unspecified manner, and the code used is the same pattern every time. This has the effect of preventing unauthorized use and making unauthorized use difficult.

[Brief explanation of drawings]

The figure is a block diagram showing one embodiment of the present invention. ■・・・Card, 2...Card reading device, 3
... Code checking device, 4... Random number generator, 5...
... Display device, 6... Code input device.

Claims (2)

[Claims] (1) The reading device consists of a card that stores multiple codes, a reading device that reads the codes stored on the card, and a verification device that confirms that the read codes match the input codes. reads out all of the multiple codes stored on the card, and the verification device prompts the operator to input a type of code that corresponds to one type of code randomly selected from among the read codes. 1. A code verification device, characterized in that it determines whether or not the code input at that time matches the code read out. (2) The reading device consists of a card that stores multiple codes, a reading device that reads the codes stored on the card, and a verification device that confirms that the read codes match the input codes. reads out all of the multiple codes stored on the card, the collation device sequentially selects one type of code from the read codes in an unspecified manner, and inputs the type of code corresponding to the selected code. A code verification device that prompts the user and determines that the code is normal if all types of codes match.