SU1437488A2 - Electronic key - Google Patents

Abstract

The invention relates to devices for protecting various objects from unauthorized access, in particular to electronic locks. The aim of the invention is to enhance the functionality by protecting the key from unauthorized access.

Description

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PA to key codes in the mode of rewriting new codes. In the working mode, protection against unauthorized access to the key code is provided by using the special access code stored in memory block 4. If the access code entered into the key matches the code stored in memory block 4, a zero sequence appears at the output of the modulo two. The key code, read out from memory block 5, the passage through the modulo two adder, is not distorted and is allocated to the key exit. If the access codes do not match

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The invention relates to a technique for protecting various objects from unauthorized access, in particular to combination locks, and is an improvement to the key included in the composition of the lock according to the main auth. № 1388531

The purpose of the invention is to expand the functionality.

Figure 1 shows the functional diagram of the device; in fig. 2 - block diagram of permissions 3 entries,

The electronic key contains the first adder 1 modulo two, the second adder 2 modulo two, block 3 of the correspondence code memory, block 4 of the key code memory, block 5-write resolution, first, second, third and fourth elements AND 6 - 9, electrical connector 10,

The electronic key works as follows.

When the key is connected to the lock, power is supplied to the key and the memory block and resolution block counters are reset (this mode, as relating to the basic operation of the device and not affecting the achievement of the objective of the invention, is not shown in FIG. 1). Then, the sequence of clock pulses enters the first pair of connector pins from the lock, and the access code sequence to the third pair of connector pins. Every ry tact happens

the output of the modulo two zero sequence is absent and the key code is output in a distorted form. In the recording mode, a recording resolution block is included, in which the next zeros of the zero sequence are counted in the zero sequence from the output of the adder modulo two. The mode of recording new codes is set only when the zero sequence contains the number of the next zeros equal to the length of the access code. 1 hp f-ly, 2il

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reading the access code from the memory block 3 and the key code from the memory block 4. The result of adding the access codes from adder 1 modulo two is fed to the input of adder 2 modulo two, to the second input of which the key code is received from memory block 4. If the access codes that enter the key and 1fan in memory block 4 are the same, the key code arrives at the output of the device undistorted. Otherwise, a non-zero sequence is obtained at the output of adder 1, which on the adder 2 distorts the key code. If it is necessary to write new codes to the key, a fifth pair of the connector pins is signaled. Recording, Dp determining the authorization of writing to the key input is the same as in the operating mode, a sequence of access codes is given, and on the first pair of connector pins, ticks and a sequence. If the access codes stored in the memory block 3 are equal to the input, then at the output of the modulo two the zero sequence will be generated, which through the open element E9 enters the input of the recording resolution block 5. In block 5 of the resolution of recording by clock pulses, the next ones, a series of zeros from adder I modulo two, are counted. Number of incoming additional zeros at the input

Block 5 write resolution should be equal to the number of bits of the access code. After counting a certain number of subsequent zeroes, the recording resolution block 5 permits the passage of a signal. Recording through AND 7, which places the memory blocks in the recording mode. In addition, this signal opens AND 6i 8 elements, through which the access code and the corresponding key code are written into the memory blocks. After writing new codes, the key is disconnected from the recorder, the power in the key disappears and the write enable signal from block 5 disappears, the key is automatically transferred to the read mode and is ready for operation.

Thus, the introduction of the recording resolution block and the AND elements allows changing the codes in the key without opening it, which increases the functionality of the device.

Claims (1)

1. Electronic key on author, sv. 1388531, characterized in that, in order to expand its functionality, it contains a recording resolution block and AND elements, the first input of the first modulo-two adder connected by the first input of the first element AND, the second input of which is connected to the output of the second element AND, the first input the third element And, the inputs of the key code storage unit and the code memory block of the correspondence code, the output of the first element And is connected to the information input of the memory block of the correspondence code, the second input of the third element And is connected to the fourth contact m of the electrical connector, and the output with the information input of the memory of the key code code, the five pin of the connector is connected to the first input of the fourth element I, the second input connected to the output of the first modulo two, and the first input of the second modulo two, and the fourth element I is connected to the first input of the recording resolution block, the second input of which is connected to the first contact of the electrical connector and the synchronization inputs of the key code memory block and the memory block of the corresponding code, the output of the resolution block the reading is connected to the first input of the second element I, the second input of which is connected to the fifth contact of the electrical connector and the first input of the fourth element I. 2, Key pop, 1, characterized in that the recording resolution block contains a counter, a matching circuit, NOT elements, and an AND element, the counter clock input being connected to the first contact of the electrical connector and the synchronization inputs of the key code block and the block the memory of the correspondence code i and the outputs of the counter are connected to the corresponding inputs of the coincidence circuit, the output of which is connected to the fifth contact of the electrical connector and through the first element NOT to the first input of the element I, the second input of the element I connected to the fifth contact of the electric ktricheskogo connector element and through the second NOT - a counter countable entry. d / a "a5 - / f Cvem- approach1 NOT V On the block FIG. 2