SU1661749A1 - Data input device - Google Patents

Abstract

The invention relates to computing and is intended to enter information into a computer. The aim of the invention is to increase the security of the device against unauthorized access by delimiting user access by type of information. The device contains a memory block 1, an indication block 2, a comparison block 3, a data input block 4, a register 5, a command receiving block 6, an AND block 7, a decoder 8, a selector 9, an AND block 10. The memory block 1 stores the allowed signs objects, credentials, user numbers and passwords. The comparison of the entered password with the reference one is carried out by block 3. The input of the password, command and information parts of the messages is performed from the data entry unit 4. 5 il.

Description

s & o

4i

WITH

ka

1

The invention relates to computing technology and is intended to enter information into a computer and is an improvement of the device according to the authors. St. No. 1078419.

The aim of the invention is to increase the security of the device from unauthorized access by delimiting user access by types of information.

Fig. 1 shows a functional diagram of the device; f. Fig. 2 is a diagram of a memory block; FIG. 3 is a block diagram of a comparison; figure 4 is a block diagram of the reception of commands; on fig.Z - diagram of the selector.

The device contains a memory block 1, an indication block 2, a comparison block 3, a data input block 4, a register 5, a command reception block 6, an AND block 1, a decoder 8, a selector 9, And 10 element, a reset input 11 of the device - Mandal output tires 12, the output Readiness 13 devices, information output tires 14 and tires 15 signs of selection.

Memory block 1 (Fig. 2) contains an HE element 16, a resistor 17, a delay element 18, a switch 19 Record-read mode, a storage cell unit 20, a register 21, a diode 22, a battery cell 23, and a power bus 24.

Comparison unit 3 contains the Equivalence element 25.1 - 25.k, the And element 26, the trigger 27 and the delay element 28.

The command receiving unit 6 consists of a block of 29 AND elements, a register 30 and an OR element 31.

Block 29 of the elements And is designed to block the recording of commands, register 30 is for receiving command parts of messages typed on block 4 of data entry. Block 6 is equivalent to the known block of AND elements, the second register, and the OR element.

The selector 9 contains the elements And 32.1-32.m and the element OR 33.

Memory unit 1 is designed to store signs of permitted objects, authority signs, user numbers, and passwords.

As an element NOT 16, an inverter should be used, in which the output should be closed when the power is turned off, i.e. have a large output impedance and maybe

made, for example, on one of the elements of the chips 133 LAV, 133 LA7.

The resistor 17 is designed to supply power (logical 1) from the battery element 23 to the gate inputs of the storage cell unit 20 (i.e., to ensure that information is stored in the battery cell when the main power source is disconnected)

Block 20 of cumulative elements is designed to store signs of allowed objects, signs of full powers and user passwords. As cumulative elements can be used chips 564 RU2.

Diode 22 is designed to prevent the battery cell from discharging when the main power is off and charging the battery cell when the main power is on.

5 The battery element 23 is intended to power the storage elements (storing information in the storage elements) when the main power source is disconnected. 0 Memory block 1 operates in two modes: write mode and read mode.

Recording mode Switch 19 is transferred to a position where a logical signal 1 is generated at its output. When a gate signal is received from block 4 through an NOT element 16 to the inputs of block 20, cumulative elements record the signs of allowed objects, credentials and passwords user to the appropriate memory location specified by the user number.

5 Read mode. The switch 19 is switched to the logical O state at the output. When a strobe signal is received from block 4 through an NOT element 16, information is output from the memory cell defined by the user number. After some time (more than the time of the transition process when reading information from accumulative blocks - elements) determined by delay element 18, information is written to register 21,

The display unit 2 is intended for marking (indication) of those switches of the data input unit 4, which corresponds to the list of allowed commands. It contains, for example, n inverters with an open collector output and indicator lamps connected to the outputs of the inverters and the bus + power supply.

Comparison unit 3 is equivalent to the known comparator unit and the delay element.

When the passwords at the output of the element And 26 are equal, a high level is established, which, when a signal arrives from the delay element 28, sets the trigger 27 to 1. The delay element 28 is designed to prevent false triggers of the comparison unit 3.

Data entry unit 4 is intended for a set of information and command parts of messages, as well as for a set of passwords. It contains switches for the set of the information part of the message, which simultaneously serve for the set of passwords, switches for the set of the command part of the messages, a switch for entering the passwords, an encoder for converting the typed decimal number into a binary decimal code, a driver for shaping the shift and consisting of series-connected OR elements and a delay element.

Data input unit 4 is equivalent to a known data input unit, an encoder, and a driver.

Register 5 is designed to receive signs of allowed objects, signs of authority, user numbers, passwords, information parts of messages dialed on data input unit 4.

Unit 7 of the elements I is intended for issuing indications of authority to the display unit 2 and the unit 6 for receiving commands on a signal from the comparison unit 3. It contains k elements And, the first inputs connected to the outputs of the memory block 1, and the second inputs are connected and connected to the output of the comparison block 3.

The decoder 8 is designed to convert the object code into a signal at the corresponding output.

The selector 9 is designed to form the enable signal (logical 1) when the signal coincides

0

logical 1 from the output of the decoder 8 with the corresponding sign of the allowed object (search key code or program name).

The device works as follows.

When the power is turned on, the register 5 and the register of the block 6 for receiving commands are set to O and at the output of the block

This comparison establishes a prohibiting signal (logical O), which holds the block 7 of the elements AND in the closed state (the circuit for resetting the circuit to its initial state is not shown).

The device operates in two modes: basic mode and information recording mode in memory block 1.

Main mode. To ensure that a message is entered from the device, the user must first enter his number and password. Entering the next digit of the number or password is made on the information part of the block

4 input data. In this case, the information is recorded in register 5 by the signal of the information received from the output of block 4. After entering the number and password in register 5, the user presses the switch to enter the password in block 4 of data entry. At the same time, from the outputs of memory block 1, they are received accordingly: at block 3, the comparison is the reference parameter 5

0

0

five

0

the role, on block 7 of the elements I, are signs of authority, on the selector 9, signs of authorized objects. In block 3, the comparison of the signal from the output of the password entry switch is performed

comparison typed on the data entry unit and the reference password. If a password comparison has occurred, then from the output of the comparison unit 3 to the unit 7 of the elements I the authorizing signal and the indication of authority come through the open unit 7 of the elements I come to the display unit 2 and the unit 6 for receiving commands. At the same time, unit 2 performs 0 indication of those switches of input data unit 4, which corresponds to the list of allowed commands, and in block 6, preparations are made to receive allowed commands for this user.

After that, the operator can type the information and command parts of messages on the data entry unit 4. The information part of the message recording

7 16

is sent to register 5. In this case, the object identifier (information search key, program name), which is accessed, is converted by decoder 8 into code 1 of N, which goes to selector 9, to other inputs of which signs of allowed objects of this user are given the output of block 1 of memory, or the dialed object identifier is allowed for this. the user, at the output of the selector 9, a signal of logical 1 is set, which ensures the formation of a signal at the output of the element 10 of the signal readiness. The command part of the messages is written to the register of block 6 receiving ko-nand through its corresponding open elements I. And after dialing the command from the output of block 6 through the second element 10 to exit 12, the signal Readiness comes, - To Tom the message on tires 12-14 appears in the computer (not shown). After receiving the message, the computer reads information from register 5 and register Yloka 6 for receiving commands.

At the end of the operation, the device is locked by pressing the Switch for entering the password. At the same time, if from the register 5 to the Comparing unit 3 a code is received that is not equal to the reference password received from the Output of the memory block 1, the block 3 is turned off, blocking the block 7, which leads to blanking of the display 2 and blocking the command reception block 6, If the code has been compared with the password, it is necessary to enter into the register 5 an arbitrary code not equal to the reference one, and press the Enter password button.

9 8

The mode of recording information in memory block 1. To ensure that information is entered into memory block 1, it is necessary to set the Record mode switch to read block 1 set to the Record mode. From block 4, the signs of allowed objects, signs of authority,

user number and password. Then, when pressing the Enter password of block 4 from register 5, the signs of allowed objects, authority signs and password are written into memory block 1 at the address specified by the user number.

After that, the mode switch is set to Read mode20

niya

Claims (1)

Invention Formula Device for entering information 5 of the author. St. No. 1078419, characterized in that, in order to increase the security of the device against unauthorized access by delimiting user access Q by type of information, a decoder, a selector and an AND element are entered, the additional outputs of the register are connected to the inputs of the decoder and are the outputs of the object code, the decoder outputs are connected to the inputs of the first selector group, the second group of inputs of which is connected to the additional outputs of the memory block, the output of the selector is connected to one input of the AND element, the other input of which o is connected to the output of the command receiving unit, the output of the AND element is the output of the device. a §. It t N o o- j Ј40 Unlock eleven Ot6loka7 12 On foot W From about 6sh1 32.1 From o- blocks 3. t 33 On block B