JPS63292231A - Computer system - Google Patents

Abstract

PURPOSE:To enhance the secrecy and the safety of the whole of a system, by permitting the transfer of information between a peripheral device corresponding to a coincided password and a computer main body. CONSTITUTION:A password is registered in a registration register 11. When a user inputs the password, an inputted password is stored in the input register 12 of a password block 1, and a comparator 14 compares the content of the register 11 with that of the input register 12. When compared contents coincide with each other, the output of the comparator 14 on a signal line 16 maintains, for example, a state of high level. Therefore, when the system is operated and the information is written, a select signal which instructs a controller 4 outputted from a CPU is validated by an AND gate 15 only when the passwords coincide. The CPU permits the use of the system by confirming the output level of the comparator 14.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a plurality of I10 devices connected to a personal computer, an office computer, etc. via an interface (Ilo), including; i) peripheral devices; Concerning computer systems.

[Prior Art 1] Conventionally, in a password registration system for a system including a computer and its peripheral devices, when the system power is turned on, a message is output to inform the operator to input the password on the display device (CRT neck device). Here, the required password is generally used to grant permission to use the entire system.Then, the password entered by the operator is compared with the password stored in memory etc. and when the passwords match, the computer allows the system programs and peripheral devices to operate.

[Problem to be Solved by the Invention] Therefore, once an appropriate password is entered by the operator, the user can access all devices in the system components, such as a floppy disk drive, while the power is on. , access (operation) to peripheral devices such as hard disk drives and printers.

For this reason, it becomes possible to access important files stored on hard disk drives, etc. that are not created by the operator, and as a result, backers and others can stop infringing on the files and destroy the files. There was a drawback that this could happen.

Therefore, an object of the present invention is to eliminate the drawbacks of the above-mentioned conventional example,
The object of the present invention is to provide a computer system that can enhance the confidentiality and safety of the entire system by allowing each I10 device to be used individually with its own password.

[Means for Solving the Problems] In order to achieve such an object, the present invention provides an input means for inputting a password in a computer system that exchanges information between the computer main body and each peripheral device. and a storage means for storing a predetermined password corresponding to each peripheral device, and determining whether the password input by the input means and the password stored in the storage means match. The present invention is characterized by comprising: a determining means; and a means for permitting the exchange of information between the peripheral device and the computer main body that correspond to passwords that match as a result of the determination by the determining means.

[Operation] In the present invention, a password is determined in advance for each peripheral device, and this password is stored in the storage means. When the password entered by the input means and the password stored in the storage means match, the means for permitting information exchange allows the information exchange between the peripheral device corresponding to the matched password and the computer main body. This makes it possible to protect the confidentiality of the system and prevent erroneous operation of peripheral devices due to erroneous input.

[Embodiment 1] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an example of the configuration of an embodiment of the present invention.

In FIG. 1, 1 to 3 are password blocks,
Password blocks 1 to 3 are each a floppy disk device (hereinafter referred to as FD)7. Hard disk device (hereinafter referred to as +1D) 8. Printer (hereinafter referred to as PTR) 9
This is a circuit part that allows password registration for .

4 to 6 are the FD7 controller, HD8 controller, and PTR9 controller, respectively. 10 is a register, and the register 10 stores information indicating whether or not a password is registered in password blocks 1 to 3.

B1 to B3 are an address bus, a data bus, and a control signal of the system, respectively. ℃1 is the select signal line for FD7 and FD controller 4, fl2 is 11D8
and a select signal line for the HD controller 5.

k3 is a select signal line for PTR9 and PTR controller 6, and 14 is a select signal line for FD controller 4 and FD
7, control and data signal lines between fl5. fl6 are control and data signal lines between controller 5 and HD8, and controller 6 and PTR9, respectively.

fl, 7-1 to j27-n are password blocks 1 to 3
This is a signal line that outputs a signal indicating whether or not a password is registered. fLlo is status register 10
data bus B2, that is, the password registration status.
This is a signal line that controls the timing of output. A main computer (not shown) is connected via these signal lines.
Password information and control information are sent from u), and each component device operates.

FIG. 2 shows an example of the configuration of the password blocks 1 to 3 shown in the first diagram. In this example, a password block for FD7 will be shown. In FIG. 2, 11 is a data register for password registration as a storage means, and the register 11 latches a password code defined in advance by the user. Reference numeral 12 denotes a register for latching a password code input by the user using an input means such as a keyboard (not shown). 13 is an address decoder, and the address decoder 13 is connected to the corresponding FD7. HD8. I1 such as PT89
Detects a select signal that selects the 0 device and its controller. Note that this select signal is sent from a computer (not shown).

14 is a comparator that functions as a determining means for comparing the respective password codes latched in register 1 and register 2. 15 is an AND gate element which takes the AND of the outputs of the comparator 4 and the address decoder 3. The anchor 5 functions as a permission means, and when the passwords match, the output of the AND gate 5 becomes a select signal to the I10 device controller 4. Reference numeral 16 denotes a battery provided to maintain the contents of the password registration register 11 even when the power to the system main unit is turned off.

fl, 11 is a clock signal line for causing the password registration register 11 to latch the password code. f
i12 is a clock signal line for causing the register 12 to latch the input password code, and n13 is a reset signal line for clearing the contents of the register 2 when the power is turned on.

fl14 is the output signal line of the latched registered password code, ρ15 is the output signal line of the latched input password code, and λ16 is the signal line that becomes low level health only when inputs A and B of the comparator 14 match (A-8). It is.

fl, 17 is a signal line that transfers a signal obtained by decoding the select signal by the decoder 13 to the I10 device controller 4. fl,1 is an output signal line for transferring the output of the AND element 15 to the corresponding I10 device controller 4. fl9 is a signal line for controlling the output of the comparator 14, and when this signal line 19 is at a high level, the signal line u16 is at a high level, forcing the signal line fll to be at a high level, and the I10 device controller 4 Disable select signal.

Next, the specific operation of the embodiment of the present invention will be explained according to the flowchart shown in FIG.

In FIG. 3, first, when the power is turned on, the arithmetic processing unit (CPII) that controls the system reads the contents of the status register 10 and determines whether or not each I10 device has a password registered (step Sl). If the password for each I10 device is not set,
The PU displays the device name for which password registration is not required on the CR7 display device or the like to prompt password registration. When the operator inputs a password for registration, the CPU writes the input password into the register 11 of the password registration target device (steps 52 to 53).

When the password for the FD7 is registered in the registration register 11, a signal indicating that the password has been registered is sent to the status register 10 via the signal line 7-1, and the status register 10 is changed to Fl). 7 password registration completion is memorized.

After that, the system returns to the normal system program and waits for user input. When the user accesses the application program, the CPU displays the name of the I10 device that requires password input on the CR7 display device in step S5, and prompts the user to input the password for the corresponding device (step S5).

Then, when the user enters a password, the entered password is stored in the password block 10 input register 12.
is memorized. Then, the comparator 14 compares the contents of the registration register 11 and the contents of the input register 12. When the comparison contents match, the output of the comparator 14 on the signal line 16 is maintained at a high level (step 57).

Therefore, when the system operates and writes information to FD7, the CPLI will only be activated if the passwords match.
The AND gate 15 makes the select signal output from the FD controller 4 valid.

By checking the output level of the comparator 14, the CPU performs step 55 until all the passwords input corresponding to each I10 device match the registered password.
- Repeat the steps from S48. Then, when all the input passwords match the registered passwords (step S8
), permit use of the system.

As explained above, in this embodiment, when the passwords match, the AND gate 15 passes the select signal of the 110 device to the 110 device to permit use of the 110 device, and when the passwords do not match Since the ant gate 15 blocks the select signal, the operator cannot use the 110 device unless he knows the password.

[Effects of the Invention] As explained above, according to the present invention, by making each I10 device individually usable with a password,
The confidentiality and security of the entire system can be improved.

Furthermore, it is possible to prevent malfunctions such as activating equipment 110 that is not originally used due to erroneous input from the input device.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of the configuration of an embodiment of the present invention, FIG. 2 is a block diagram showing an example of the configuration of a password block in the embodiment of the present invention, and FIG. 3 is an operation of password registration in the embodiment of the present invention. It is a flowchart which shows an example of a procedure. 1 to 3... Password block, 10.11.12... Register, 13... Decoder, 14... Comparator, 15... AND gate. Figure 3: Flowchart of 1.

Claims (1)

[Scope of Claims] 1) A computer system that exchanges information between the computer main body and each of the peripheral devices, comprising: input means for inputting a password; and a password determined in advance for each of the peripheral devices. storage means for storing, determination means for determining whether or not the password input by the input means matches the password stored in the storage means, and as a result of the determination by the determination means, a match is determined. A computer system comprising means for permitting exchange of the information between a peripheral device corresponding to the password and the computer main body.