JPH02191056A - Password code collation device - Google Patents

Abstract

PURPOSE:To average the flriction of a key top and to prevent a password code from being analyzed by the third person by providing a password code comparing means, etc., to compare a set password code, which is prepared by a password code preparing means, with an input password code inputted by an input means such as a keyboard, etc. CONSTITUTION:A keyboard 1 which is an input device to a CPU, a timer mecha nism 2, time display 3 composed of an LED, etc., and CPU arithmetic part 4 are provided. The CPU arithmetic part 4 is equipped with a password code preparing means 8 and a password code comparing means 11. The password code preparing means 8 successively and variably prepares the set password code according to a fixed condition. The password code comparing means 11 compares the set password code, which is prepared by the password code preparing means 8, with the input password code inputted by the input means such as the keyboard 1, etc., and judges it for each digit concerning all the digits whether the both codes are coincident or not. Thus, the password code is made variable and the dirtiness or friction of a key can be averaged. Then, the password code is prevented from being analyzed by the third person.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a personal identification code verification device which is a computer-applied device.

<Prior art> For example, in a PIN code verification device used to control the opening and closing of private residence entrances and confidential entry control areas, a PIN code is input into a CPU using an input means such as a keyboard, and a PIN code set in advance with this input PIN code is input into a CPU using an input means such as a keyboard. The system checks the set PIN code and opens the door if it matches, and if it does not match, it keeps the area closed, allowing only a limited number of people who know the PIN code to enter. There is something.

However, in this type of conventional PIN code verification device, the preset setting code is fixed, and therefore the PIN code is unchangeable.

<Problems to be Solved by the Invention> Therefore, in the past, the number of pin codes that can be entered using a keyboard, etc. is limited, and certain keys may become dirty with hand grime or worn out, making it difficult for a third party to enter the pin code. There was a risk that the numbers used could be easily analyzed.

In view of the above-mentioned problems, the present invention makes the PIN code variable so that dirt and wear on the key is evened out, and prevents the PIN code from being analyzed by a third party.

<Means for Solving the Problem> The technical means of the present invention for solving this technical problem is to input a pin code into the CPU using an input means such as a keyboard 1, and to input the input pin code and a preset setting pin code. and a PIN code creation means 8 for sequentially and variably creating the set PIN code according to certain conditions; The present invention is characterized in that it is provided with a password code comparison means 11 for comparing the set password code and the input password inputted by an input means such as a keyboard 1.

<Example> Hereinafter, the present invention will be explained according to the illustrated example.
The figure shows a block diagram of a PIN code verification device used for residential entrances or security entry control doors, etc. In opening and opening, 1 is a keyboard that is an input device to the CPU, 2 is a clock mechanism, and 3 is an LED. This is a time display device made up of the following. Reference numeral 4 denotes a CPU calculation unit, which has time reading means 6, time display means 7, password code creation means 8, key manual reading means 9, key manual storage means 10, password code comparing means 11, and matching signal output means 12.

The time reading means 6 reads data in the clock IC of the clock mechanism 2 and sends it to the clock display buffer.

The time display means 7 drives the time display 3 according to the data in the clock display buffer to inform the operator of the time (part of the password).

The PIN code creation means 8 generates a fixed code (
5, 6, 7.8) shown in Fig. 5 and the fluctuation code (1°2 shown in Fig. 5) indicating the hour unit of the current time, 6
A variable digit setting password code (561782 shown in FIG. 5) is created and stored in the password code buffer 15.

The key reading means 9 monitors the keyboard signals sent from the keyboard 1 and sequentially reads signals indicating each number of the input password inputted from the keyboard 1 one by one.

The key manual storage means 10 sequentially stores the password code read by the key manual reading means 9 into the key manual buffer 16 while shifting it from the lower digit side as shown in FIG. For example, as shown in FIG.
When 3456 is stored, if a key manual force value of 1 is input, 2 is stored in the key manual buffer 16 as shown in FIG.
34561 is stored.

The PIN code comparison means 11 compares the contents of the PIN code buffer 15 and the contents of the key manual buffer 16, and sequentially determines whether or not all digits match, digit by digit.

If all the digits match as a result of the comparison between the password code and the key input by the password comparison means 11, the matching signal output means 12 drives a relay or the like and sends an open signal to the outside to open the door.

Next, the operation will be explained. First, the creation of a setting PIN code will be explained with reference to the flowchart shown in Figure 2.
In step ■, the PIN code creation means 8 sets the clock amount 7 (
n also reads the numeric value of the specified digit from the clock display buffer read by stage 6.

That is, when incorporating the hour unit of the hour and minute of the time into the created password code, if the clock display buffer is currently reading 12:34, the numbers ``■'' and ``2'' are read. Step ■
Then, as shown in FIG. 5, the above numerical values (1, 2) are stored in the designated digit position of the PIN code buffer 15. Further, in step (2), predetermined fixed codes (5, 6, 7, 8) are stored in the specified position of the PIN code buffer 15 as shown in FIG.

Next, reading the key force will be explained with reference to the flowchart shown in FIG. 3. In step (2), it is determined whether or not there is a key force. If there is key power, the contents of the key power buffer 16 are shifted to the upper digits in step (2). For example, as shown in FIG.
If 123456 is stored between the digit and the first digit, then 23456 is shifted and stored between the sixth digit and the second digit of the key manual buffer 16, as shown in FIG.

Then, in step (2), the key human power value is stored in the first digit of the key human power basso. For example, as shown in Figure 7, the number 1
When you input the key manually, the key input buffer 16 contains 2345
61 is stored.

Further, the operation of comparing password codes will be explained with reference to the flowchart of FIG. 4. This comparison operation is performed successively after the key manual reading operation. First, in step ■, the PIN code buffer 15 and the key manual buffer 16 are
The contents are compared one by one in sequence. In step (2), it is determined whether all six-digit pin codes have been compared, and if they have not been compared, the process returns to step (2) to continue the comparison. When the comparison of the 6-digit PIN codes is completed and all the PIN codes match, a PIN code matching flag is set in step (2), and the matching signal output means 12 outputs an open signal from the CPU calculation unit 4. As a result, the door drive circuit is driven and the door such as the entrance is opened. On the other hand, if the codes of any digits do not match, the CPU arithmetic unit 4 does not output an open signal and the door such as the entrance remains closed.

In the above embodiment, the set password code is sequentially created variably by combining four fixed codes and two variable codes indicating the hourly unit of time. As shown in Figures 1 to 11, the setting PIN code may be configured by a combination of four fixed codes and a variable code indicating the first digit of the minute of the time. As shown in FIG. 12 or FIG. 13, the set PIN code may be configured by combining a fixed code and a variable code indicating a numerical value indicating the first digit of the hour unit and the first digit of the minute unit of the time. good. Further, as shown in FIG. 14 or 15, the set password code may be configured by combining a fixed code and a variable code indicating a calendar value.

Note that when a variable code and a plurality of fixed codes are combined to form a set password, the digit in which the variable code is inserted can be selected using a dip switch or the like set in the device. That is, as shown in FIG. 16, the dip switches may be set to be either on or off, and a variable code indicating the hourly or minute value of the time may be inserted in the on position. .

<Effects of the Invention> According to the present invention, there is provided a PIN code creation means for sequentially and variably creating the setting PIN code according to certain conditions, and a PIN code created by the PIN code creation means and inputted by an input means such as a keyboard. Since the present invention is equipped with a PIN code comparison means for comparing the PIN code with the input PIN code, the set PIN code can be changed sequentially, and therefore only a specific key is no longer used to input the PIN code as in the past. Dirt on the keys and wear on the key tops can be evened out, and it is possible to effectively prevent a third party from analyzing your password. Moreover, since the PIN code changes sequentially, it is difficult for a third party to analyze it even at a glance, and even if the PIN code is known to a third party, the PIN code will have already changed by the time the third party uses it. , becomes useless. What's more, wear and tear on the key tops is averaged out, extending the life of the keyboard, etc. Also, since the set PIN code changes sequentially, there is no need to change the PIN code regularly.
Maintenance also becomes easier.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing one embodiment of the present invention, Figs. 2 to 4 are flowcharts of the same, Fig. 5 is a diagram for explaining the setting password code, and Figs. 6 and 7 are diagrams of the key manual buffer. FIG. 3 is a diagram for explaining a reading operation. FIGS. 8 to 16 are diagrams for explaining setting password codes showing other embodiments, respectively. 1...Keyboard, 4...CPU calculation unit, 8...
PIN code creation means, 11...PIN code comparison means. Patent applicant: Ikeda Electric Co., Ltd.)

Claims (1)

[Claims] (1) A PIN code is entered into the CPU using an input means such as a keyboard (1), and the input PIN code is compared with a preset setting PIN code, and if they match, a predetermined output is performed. In the device, a PIN code creation means (8) that sequentially variably creates the setting PIN code according to certain conditions, and a keyboard (
1. A PIN code comparison device comprising PIN code comparing means (11) for comparing the PIN code inputted by the input means such as 1).