KR940009825B1 - Method of licking personal computer - Google Patents

Abstract

The keyboard locking method uses BIOS command of a keyboard controller in a personal computer. The method removes the necessity of the circuit and machinery used in previous method using key. The method comprises the steps of locking keyboard (a) consisting of inputting new password if the password does not exist or wants to be modified and locking keyboard using the password; freeing keyboard lock (b) when input password and the keyboard lock password are the same.

Description

How to lock a key on your personal computer

1 is a block diagram of hardware to which the present invention is applied.

2 is a control flowchart of a key locking method according to the present invention.

* Explanation of symbols for main parts of the drawings

1 CPU 2 Keyboard Controller

3: keyboard 4: memory

5: system bus

The present invention relates to a key locking method of a personal computer.

In general, personal computers maintain data confidentiality by implementing additional key locks in additional circuits and appliances.

Therefore, when a user loses a key, not only the key lock function can be implemented but also the personal computer cannot be used when the personal computer is lost in the locked state.

In addition, the key lock switch can be easily removed by opening the top cover even when the key is locked, which makes it difficult to maintain confidentiality of data.

Accordingly, the present invention has been made to solve the above problems, the key lock function to maintain the confidentiality of the data through the key lock (Key Lock) function using a command of the keyboard BIOS Firmware (Basic Input Output System Firmware) in the keyboard controller Its purpose is to provide a method.

In order to achieve the above object, the present invention converts a keyboard 3 that inputs a user's command and a keyboard scan code inputted through the keyboard 3 into a system scan code, and converts the CPU through a system bus 5. A key lock method applied to a personal computer having a keyboard controller (2) informing (1) and a memory (4) for storing data loaded by the CPU (1), wherein the presence or absence of a password is searched for. A first step of searching for modification of an existing password if a password exists; a second step of inputting a new password twice consecutively if the password does not exist or the existing password is modified in the first step; Searches whether the new password entered in two consecutive steps is the same and if it is the same, sends the newly entered password to the keyboard controller and locks the keyboard. A third step of operating the password, a fourth step of operating the existing password as the keyboard lock password if the existing password is not modified in the first step, and the keyboard in a state where the keyboard lock password is operating as described above. Search for whether a password has been input through the fifth step of searching whether the password is the same as the activated keyboard lock password, and if the password input in the fifth step is the same as the activated keyboard lock password, the keyboard is unlocked. If not the same, it characterized in that it comprises a sixth step (110) to proceed to the password input step (90,100).

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

1 is a configuration diagram of hardware to which the present invention is applied, where 1 represents a central processing unit (CPU), 2 represents a keyboard controller, 3 represents a keyboard, 4 represents a memory, and 5 represents a system bus.

A keyboard controller 2 for inputting a user's command, a keyboard controller 2 for converting into a keyboard scan code input through the keyboard 3 and informing the CPU 1 through a system bus 5, and the CPU ( And a memory 4 for storing the data loaded by 1). When a password for locking the keyboard is applied, the CPU 1 transmits the password to the keyboard controller 2 via the system bus 5 to transmit the password. Instruct the keyboard controller 2 to activate the function. Accordingly, the keyboard controller 2 locks the keyboard 3 by not processing any input other than a password according to the command.

2 is a flowchart illustrating a key locking method according to the present invention. FIG. 2a illustrates a process of inputting and operating a password, and FIG. 2b illustrates a keyboard unlocking process.

In the process of inputting and operating a password as shown in FIG. 2A, the CPU 1 searches for whether or not a password for the keyboard lock function exists in the keyboard controller 2 (10). Search whether or not to modify (70).

If the password is not modified, the CPU 1 sends a password enable command to the keyboard controller 2 so that the other key inputs are not processed until the keyboard lock password is entered, thereby maintaining the locked state of the key. .

In the password presence search step (10), if no password exists, a new password is input two times in succession (20, 30), and the input password is compared (40), if not the same, and the newly entered The password is transmitted to the keyboard controller 2 (50) so that the keyboard controller 2 recognizes it so that the newly entered password is operated as a key lock password (60) so as not to process another key input until the password is input. To lock the key.

On the other hand, if the password is requested to modify the search result in the password modification search step 70 is performed from the step 20 of entering the new password.

The reason for entering the new password twice consecutively is for the user to clearly recognize his password.

As shown in FIG. 2B, the keyboard unlocking process searches for whether a password has been entered in the key-locked state as described above (90), and if the password is input, the input password is the same as the password stored in the keyboard controller. Search (100).

Only when the input password and the password stored in the keyboard controller are the same, the key is unlocked so that the (110) key can be used.

As described above, since the circuit and the mechanism of the key lock device used in the related art are not necessary, the present invention is easy to manufacture, and there is little fear of key loss, so that the user can conveniently use it.

Claims (1)

A keyboard controller 2 for inputting a user's command, a keyboard controller 2 for converting the keyboard scan code inputted through the keyboard 3 into a system scan code and informing the CPU 1 via the system bus 5; And a key lock method applied to a personal computer having a memory 4 for storing data loaded by the CPU 1; A first step (10, 70) of searching for the existence of a password and searching whether to modify an existing password if a password exists; A second step (20, 30) of inputting a new password twice consecutively in order to modify the existing password or the password does not exist in the first step; A third step (40, 50, 60) of searching whether the new password inputted twice in the second step is the same, and if the same is the same, transmitting the newly entered password to the keyboard controller and operating as the keyboard lock password; A fourth step (80) of operating the existing password as a keyboard lock password if the existing password is not modified in the first step; A fifth step (90,100) of searching whether a password is input through the keyboard 3 in the state where the keyboard lock password is in operation as described above, and searching whether the password is the same as the operated keyboard lock password; and the fifth step And a sixth step (110) of releasing the keyboard lock and proceeding to the password input step (90,100) if the password inputted at the same as the activated keyboard lock password.