JPH01152526A - Keyboard with input invalidating function - Google Patents

Abstract

PURPOSE:To dynamically set a wrong pass-word by providing a special key to start a pass-word setting mode and a memory to store the pass-word. CONSTITUTION:When a general key 7 is pushed by a normal key input operation, by detecting that the key 7 is pushed, the control program of a CPU 1 and a ROM 2 practices a key code conversion processing, and it is sent to a data processing device through a serial interface part 3. When the special key 6 is pushed down lest an incorrect key input should be practiced from a keyboard 5 while the data processing device is operated, it is detected that the key 6 is pushed down, and the key code is stored to a memory 8 for the pass-word. When the key input operations are practiced only fixed times, the key input operations are finished by detecting it. Thus, the pass-word of key input impossibility is set dynamically.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a keyboard with an input invalidation function that can invalidate unauthorized key input using the keyboard.

[Conventional technology]

Conventionally, this type of keyboard with an input disabling function has been designed to prevent unauthorized key inputs or erroneously operated key inputs (hereinafter simply referred to as unauthorized key inputs) from the keyboard during processing operations of the data processing device. This is realized by software on the CPU that processes input data.

[Problem that the invention seeks to solve]

In the above-described conventional keyboard with an input disabling function, illegal input from the keyboard is disabled by software, so the operation method for disabling input from the keyboard differs every time the software is changed. On the other hand, keyboards without such an input invalidation function have drawbacks such as the need for the operator to monitor for unauthorized input.

[Means for solving problems]

The keyboard with an input disabling function according to the present invention includes a special key for starting a password setting mode and a memory for storing the password, and the password is set by pressing the general key a predetermined number of times, and then the password is input again. This will disable all keystrokes until the

[Effect]

According to the present invention, it is possible to dynamically set passwords that allow and disable key input using only the keyboard.

〔Example〕

FIG. 1 is a block diagram showing an embodiment of a keyboard with an input invalidation function according to the present invention. In the same figure, 1 is C
Po, 2 is ROM, 3 is the CPU 1 and ROM
2 is a serial interface that is controlled by a control program stored in the figure and sends data processing aflK data (not shown); 4 is a local bus; 5 is a keyboard with special keys 6 and general keys 7; 8 is a keyboard with special keys 6 and 7; This is a password memory that, when pressed, stores the key codes of keys that have been pressed a specific number of times in that order.

Next, the operation of the keyboard with input invalidation function configured as described above will be explained with reference to the flowchart shown in FIG. First, in a normal key input operation, when the general key 7 is pressed in step S1, the pressing of the general key 7 is detected in step S2, and the CPU 1 and RO
The control program of M2 performs key code conversion processing.

Then, in step S4, the key code converted data is sent to a data processing device (not shown) through the serial interface unit 3.

Next, while the data processing device (not shown) is in operation, the keyboard 5 is
In order to prevent unauthorized key input from being performed, when the special key 6 is pressed, in step S2 it is detected that the special key has been pressed, and in step S, it is detected that a predetermined key has been pressed. and enter that key code in step S6.
The password is stored in the password memory 7. When these key input operations have been performed a specific number of times, this is detected in step S7 and the key input operations are completed. This results in
A password that cannot be entered using keys is dynamically set. Therefore, even if there is an unauthorized key operation from the keyboard 5, the key code will not be input to a data processing device (not shown). Next, when canceling the state in which key input is disabled, a predetermined key is pressed in step aS, and then in step S9 the key code is compared with the data stored in the password memory 8 to detect a match. And step 8
1G, it is detected that the data stored in the password memory 8 and the input key code all match in the same order. A series of these operations can release the state in which key input is disabled.

〔Effect of the invention〕

As explained in detail above, 1. The keyboard with an input disabling function according to the present invention has a memory for storing passwords and a special key for transitioning to the password setting mode, and after transitioning to the password setting mode, a specific number of keys are pressed. It has the effect of being able to hold the input as a password and disable all other keystrokes unless the same specific number of keystrokes are made again.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a keyboard with an input disabling function according to the present invention, and FIG. 2 is a flowchart of a program for controlling a CPU to explain the operation of FIG. 1. 1 ・ ・ ・ Fist CPU, 2 ・
・ ・ ・ ROM, 3 ・ ・ ・
・Interface section, 4...Local bus, 5
...Keyboard, 6φ...-special key, 7...O
General keys, 8...Password memory.

Claims (1)

[Claims] Equipped with a special key that starts the password setting mode and a memory that stores the password, and after setting the password by pressing the general key a predetermined number of times, all key inputs are disabled until the password is input again. A keyboard with an input disabling function.