SU1734108A2 - Device for identification of passwords of users - Google Patents

Abstract

The invention relates to automation and computer technology, in particular, to systems for protecting users from accessing the computer system from unauthorized access. The purpose of the invention is to enhance the functionality of the device by providing identification of user passwords of a multiterminal system. , decoder, the first - the fifth summing counters, a group of registers, a group of digital comparators (CC), the first group of elements And, the first first and second triggers, first to fourth elements AND, first to nine elements OR, first to eleventh delay elements (E3), as well as the first synchronization input, information input, first, second and third synchronization outputs, information output and first address output devices, in addition, the third power supply unit, a group of blocks of coincidence, the second, third and fourth groups of elements AND, a group of triggers, a block of elements OR, an EZ group, a register, a third trigger, a tenth, eleventh and twelfth elements OR, a twelfth and thirteenth EZ, as well as a group of information inputs, the first and second groups of sync inputs, the second sync input and the second address output of the device. 1 il. SO with

Description

The invention relates to automation and computing, in particular, to systems for protecting users from accessing the computer system from unauthorized access and is additional to the author. No. 1661814

The aim of the invention is to expand the functionality of the device by identifying the passwords of users of a multi-terminal system.

The block diagram of the device shown in the drawing.

The device contains the first 1 and second 2 blocks of memory, the decoder 3, the first - the fifth counters 4-8, the group of registers 9-10, the group of comparators 11-12, the first group of 13-14 elements I, the first 15 and the second 16 triggers, the first - the fourth elements AND 17-20, the first-ninth elements OR 21-29, the first - the eleventh delay elements 30-40, the first synchronization input 41, information input 42, the first - the third synchronization inputs 43-45, information output 46, first address output 47, third memory block 48, group

VI

with

About 00

Yu

matching blocks 49-50, second 51-52, third 53-54 and fourth 55-56 groups of elements AND, group 57-58 of triggers, block 59 of elements OR, group 60-61 of delay elements, register 62, third trigger 63, dec 64th, eleventh 65th and twelfth 66 elements IL, twelfth 67th and thirteenth 68 delay elements, group 69-70 of information inputs, first 71-72 and second 73-74 groups of synchronization inputs, second synchronization input 75 and second address output 76 of the device .

The device works as follows.

An impulse Is formed on the synchronization input 75 of the device at the moment of booting or rebooting the system, passing through the OR 66 element to the setup input of the trigger 63, sets it to one state. The high value of the potential at the output of the trigger 63 opens all elements AND groups 51-52 for the passage of Ipus pulses through them. each of which is generated at workplace number j when the operator operator attempts to enter the system.

Assume that an attempt is made to enter the system at the first workplace, i.e. on the sync input 71 formed

IMPULSE Ipusk.

Pulse Ipusk passes through the element And 51 and the element OR 65. At the output of the last impulse Ipusk, which flips trigger 63 into the zero state, thereby prohibiting the reception of new pulses.

The impulse Start delayed on the delay element 60 by the trigger response time falls on the setup input of the trigger 57, transferring it to a single state. Since all other triggers of group 57-58 are reset, all groups 49-50, except the very first one, are closed for passing the character codes from information inputs 69-70, and group 49 is open. In other words, at the outputs of the elements OR 59 there is always a code that coincides with the code formed at the information input 69.

Similarly, only the pulse formed at the synchronization input 73 passes to the output of the element OR 10, the pulses arriving at the other inputs of group 69-70 do not affect the device.

The state of the flip-flops 57-58 permits the passage of an ipusk pulse delayed by the delay element 67 at the trigger trigger time through the element 55 to the first of the inputs of the memory block 48. Therefore, the address At is written to the register 62

the first workplace read from memory 48, which is recorded using a pulse from the output of delay element 67 delayed by delay element 68 for the response time of memory 48.

Thus, the arrival of the IP pulse at the input 71 leads to the recording in the register 62 of the address At of the terminal of the first working area and to the formation of the impulse pulse that performs the initial installation of the device elements. In addition, a connection is made to the first workplace, which is that

The 5th character of the password typed on the keyboard of the first workplace passes through a match block 49-50 and the group of 59 elements OR, and the readiness impulse of the next character password, typed on the keyboard of the first workplace, passes through the group 53-54 elements AND and the element OR 64. At the same time, attempts to log in from other workplaces are ignored.

Further, the work of receiving and checking the password is the same as the work of the known device. However, the computer complex, after receiving a pulse formed at the output 45 of the device, reads a frame at the Avzu address and writes it into a graphic

0 display buffer with address At.

The operation of the device for checking one user operator consists either in forming an Ip pulse at the output of element I 19 (case of full access), or in forming a pulse Ying at the overflow output of counter 6 (case of unauthorized access). In both cases, the impulse Ip or Ying enters the input of the element OR 66, opening the elements AND 510 52 similarly to the impulse Is. After that, it is possible to connect with the new workplace.

Thus, the introduction of new nodes and corresponding links allowed the use of the device in a multi-terminal user system.

Claims (1)

The invention is a device for identifying user passwords by author. St. N 1661814, which is based on the fact that, in order to expand the functionality of the device by ensuring the identification of passwords of users of a multi-terminal system, a third memory block was inserted into it, 5 group of blocks of match, second, third and fourth groups of AND elements, group of triggers, block of OR elements, group of delay elements, register, third trigger, tenth, eleventh and twelfth OR elements, twelfth and thirteenth delay elements, the first inputs of a group of matching blocks are the corresponding groups of information inputs of the device, and the second inputs are connected to the outputs of the corresponding group triggers, the second inputs of the AND elements, the third group and the first inputs of the AND elements of the fourth group, the second inputs of which are connected to the output of the twelfth element delays and the input of the thirteenth delay element, the output of which is connected to the clock input of the register, the outputs of which are the second group of address outputs of the device, and dy are connected to the outputs of the third memory block, the inputs of which are connected to the outputs of the elements of the fourth group, the outputs of the group of matching blocks are connected to the corresponding inputs of the block of elements OR, the outputs of which are connected to the information inputs of the group registers, the first inputs of the elements of the third group are the second group synchronization inputs of the device, and their outputs are connected to the inputs 0 five 0 the tenth element OR whose output is connected to the first input of the first element AND, the first group of synchronization inputs of the device is connected to the first inputs of the corresponding elements AND of the second group, the second inputs of which are connected to the output of the third trigger, and the outputs are connected to the inputs of the corresponding delay elements of the group and inputs the eleventh element OR, the output of which is connected to the reset inputs of group triggers, the input of the twelfth delay element, the first input of the sixth OR element, and the reset input of the third trigger The chamber, whose installation input is connected to the output of the twelfth element OR, the first input of which is connected to the overflow output of the third counter, the second input is connected to the output of the third element, AND, and the third input is the second synchronizing input of the device, the inputs of the trigger unit installation are connected to the outputs of the corresponding group delay elements. 25 69 a four About 76