RU182969U1 - CRYPOGRAPHIC METER READER - Google Patents

Abstract

The utility model relates to the field of cryptographic label technology (Cryptographic Labels Technology), and in particular to devices for reading and transmitting identification data from cryptographic tags NFC (Near Field Communication) technology of short-range wireless high-frequency communication, reading a QR code (Quick Response Code) QR tags, which can be widely used for automatic non-contact identification of various objects, including medicines, confidential documents, antique paintings, credit cards, passport - visa documents, technology of the blockchain (elockchain). The technical result is to expand the functionality and improve the usability of the device. The specified technical result is achieved due to the fact that the cryptographic tag reader contains a transmitting unit, an electromagnet consisting of a transmitting coil and a receiving coil, a receiving unit , pulse generator, microcontroller, interface unit, smartphone. In a particular case, the smartphone contains a touchscreen display, a built-in contactless microcircuit of a radio-frequency contactless microprocessor, and a video camera.

Description

The utility model relates to the field of cryptographic label technology (Cryptographic Labels Technology), and in particular to devices for reading and transmitting identification data from cryptographic tags NFC (Near Field Communication) technology of short-range wireless high-frequency communication, reading a QR code (Quick Response Code) QR tags, which can be widely used for automatic non-contact identification of various objects, including medicines, confidential documents, antique paintings, credit cards, passport - visa documents, blockchain technology (elockchain).

The basis of Cryptographic Labels Technology: readers and cryptographic tags, which will be supplied with various objects, with their help consumers will be able to trace the entire path of the object, from its production to the time of sale or storage.

Known passive integrated transponders (trans-ponders) that are used to identify various objects described in US patent No. 5281855 from 01/25/1994 and No. 6400338 from 06/04/2002.

The term "transponder" is formed by combining the two words -transmitter - "transmitter" and responder - "responder". Another name for integrated transponders (transponders) is Radio Frequency Identification (RFID). The development of RFID technology has become NFC technology.

NFC-technology, a joint development of Sony and NXP Semiconductors (once Philips), devices: smart cards, tags and readers, which are widely known from the prior art and are described, for example, in the magazines: Modern Electronics, No. 8, 2013 ., pp. 18-23, in the article by A. Kashkarov “Modern keys and identifiers of code access systems”; "Telecommunications and Communications", No. 6 (00112) for 2011, pp. 30-34, in the article by N. Eliseev "Technology of opportunity and application."

NFC technology operates in the frequency range with a central frequency of 13.56 MHz and provides data transfer at speeds of up to 848 kbit / s at a distance of approximately 10 centimeters.

NFC technology is backward compatible with the widely used smart card infrastructure based on ISO / IEC 14443 A standards (e.g. NXP MIFARE technology) and ISO / IEC 14443 V, as well as Sony's FeliCa cards (JIS X 6319- four).

Working at the NFC Forum, both groups of companies agreed on the air interfaces, which were called NFC-A (based on ISO / IEC 14443 A), NFC-B (based on ISOAEC 14443 B) and NFC-F (based on FeliCa).

NFC tags are passive devices that can be used to communicate with active NFC devices.

An NFC tag consists of the following components: antenna and microprocessor. Like RFID 14443 and FeliCa, NFC technology uses inductive coupling. Like transformers, the near magnetic field of two turns of conductors is used to connect the interrogating device (initiator) and the receiving device (destination).

Modern microprocessors designed for NFC tags, such as, for example, NXP's MF3D (H) x2 (Source: https://www.nxp.com/docs/en/data-sheet/MF3DX2_MF3DHX2_SDS.pdf) have built-in DES cryptoprocessors (Data Encryption Standard) and AES (Advanced Encryption Standard), which allow you to implement a symmetric encryption algorithm and a symmetric block encryption algorithm (block size 128 bits, key 128/192/256 bits), adopted as the encryption standard by the US government.

A microprocessor with a radio channel frequency of 13.56 MHz, contains: non-volatile electrical reprogrammed memory (EEPROM), central processing unit (CPU), once-programmable memory (ROM), random access memory (RAM), cryptoprocessors, radio information input / output interface (I / O) and I / O port.

The Russian microprocessor MIK213ND can be used as an NFC tag. MIK213ND transmits data at a frequency of 13.56 MHz with a speed of 106 kbit / s, being the first and only domestic-produced chip with an NFC interface.

Thus, by the term “cryptographic tag”, in a utility model, we mean an NFC tag with a crypto processor.

A well-known modern wireless identification reader is described in the patent for utility model No. 72592 dated January 10, 2008.

The modern wireless identification reader contains a GSM / GPRS modem, a GSM antenna, a subscriber’s ID card reader, a radio frequency identification contactless microcontroller (RFID) reader for transmitting energy and reading identification data recorded in the contactless microcontroller’s memory, and a second antenna capable of transmitting energy and identification data with a radio channel frequency of 125 kHz / 134.2 kHz or 13.56 MHz, a microcontroller designed for connecting external devices and controlling the operation of a modern identification wireless reader, a tag reader with nuclear magnetic resonance (NMR) properties, designed to generate a pulse and indicate tags consisting of a ferromagnetic and / or antiferromagnetic and / or ferrimagnetic metal / alloy having NMR properties due to electric / magnetic dipole or tunnel junctions between the Stark-Zeeman levels, a third antenna designed to transmit a pulse and with a frequency of 1 MHz to 1 GHz and receiving a response from tags with NMR properties, the Start button, indication LEDs, power supply unit, external power supply port, designed to connect an external power source.

Disadvantage: A modern identification wireless reader does not have the ability to read a QR code.

QR code, barcode - a QR-tag (optical) read by a smartphone that contains information about the object to which it is attached, for example, glued to an NFC-tag.

The QR code uses four standardized encoding modes (numeric, alphanumeric, binary and kanji) for efficient data storage.

The QR code consists of black squares arranged in a square grid on a white background, which can be read using image processing devices, such as a smartphone camera, and processed using Reed-Solomon codes until the image is properly recognized. Then the necessary data is extracted from the patterns that are present in the horizontal and vertical components of the image.

The identity terminal is also known, as described in US Pat. No. 9,696,397 of July 4, 2017. This terminal contains a reader for nuclear magnetic resonance (NMR) tags, a QR code reader, a display with a control unit.

Disadvantage: the inability to work in the global identification network due to the lack of a cellular module, the inability to read RFTD / NFC radio-frequency identification contactless microcontrollers is not convenient in operation.

Also known is an identity data transmission terminal described in US Pat. No. 5,986,550 of November 16, 1999. This terminal comprises a transmitting unit, a receiving unit, an electromagnet, and a pulse generator. This terminal is designed to identify data from metal transponders deposited on the surface of objects: drugs, securities, cash banknotes, credit cards.

This terminal, described in US patent No. 5986550 from 11.16.1999, we choose for the prototype.

The term "metal-transponder" in a utility model is understood (RF patent No. 50023 dated 06/30/2005) ferromagnetic, antiferromagnetic, ferrimagnetic metal or alloy possessing nuclear magnetic resonance properties due to electric / magnetic dipole or tunnel junctions between the Stark-Zeeman levels, which has at least two resonance frequencies.

In the prototype, it is possible to transmit only one code combination (i.e., one metal-transponder frequency), either it is (it is “1”) or it is not (it is “0”).

The prototype (US patent No. 5986550 from 11.16.1999) has significant disadvantages: the inability to read QR / NFC tags from identification objects, the inability to work in cellular networks for data transmission.

Thus, the technical result is to expand the functionality and improve the usability of the device.

For this, a cryptographic tag reader, comprising a transmitting unit, an electromagnet, consisting of a transmitting coil for irradiating a metal transponder with an electromagnetic wave of a first frequency, a receiving coil intended for receiving a second frequency from a metal transponder, a receiving unit, a pulse generator, further comprises a microcontroller designed to control the operation of the blocks, an interface unit, a smartphone, designed to receive and transmit data over cellular communication networks, display information data, reading data from radio frequency contactless microprocessors, while the first output of the transmitting unit is connected to the first input of the transmitting coil of the electromagnet, the second output of which is connected to the ground of the general circuit, the first output of the receiving coil of the electromagnet is connected to the fourth input of the receiving unit, the second output of the receiving magnet coil connected to the ground of the general circuit, the second output of the transmitting unit is connected to the first input of the receiving unit, the second output of which is connected to the first mic input controller, the second input-output of which is connected to the first input-output of the interface unit, the second input-output of the interface unit is connected to the first input-output of the smartphone, while the first output of the pulse generator is connected to the third and fourth input of the transmitting unit, the fifth input of which is connected to the third output of the microcontroller, while the second output of the pulse generator is connected to the third input of the receiving unit.

In a particular embodiment, said smartphone comprises a touchscreen display, a built-in contactless microcircuit of a radio-frequency contactless microprocessor, and a video camera.

The claimed utility model is illustrated by the following drawings:

FIG. 1, which shows a structural diagram of the claimed reader;

FIG. 2, which shows the operation of the claimed reader.

Consider the structure and operation of the cryptographic tag reader 1.

As can be seen from the drawing of FIG. 1, the reader of cryptographic tags 1 contains: a transmitting unit 7, an electromagnet 4, consisting of a transmitting coil 5, a receiving coil 6, a receiving unit 8, a pulse generator 9, a microcontroller 10, an interface unit 11, a smartphone 3.

The elements included in the cryptographic tag reader 1: transmitting unit 7, electromagnet 4, receiving unit 8, pulse generator 9, microcontroller 10, interface unit 11, form a reader of nuclear magnetic resonance (NMR) 2 or Nuclear Magnetic Resonances (NMR).

The first output of the transmitting unit 7 is connected to the first input of the transmitting coil 5 of the electromagnet 4, the second output of which is connected to the ground of the general circuit, the first output of the receiving coil 6 of the electromagnet 4 is connected to the fourth input of the receiving unit 8, the second output of the receiving coil 6 of the electromagnet 4 is connected to the common ground circuit, the second output of the transmitting unit 7 is connected to the first input of the receiving unit 8, the second output of which is connected to the first input of the microcontroller 10, the second input-output of which is connected to the first input-output of the in interface 11, the second input-output of the interface unit 11 is connected to the first input-output of the smartphone 3, while the first output of the pulse generator 9 is connected to the third and fourth input of the transmitting unit 7, the fifth input of which is connected to the third output of the microcontroller 10, while the second output pulse generator 9 is connected to the third input of the receiving unit 8.

Block transmitting block 7, contains a control generator, an electronic switch and a power amplifier (not shown).

The receiving unit 8, contains a high-frequency amplifier, a frequency mixer, an intermediate frequency amplifier, a phase detector and a high-frequency power amplifier (not shown).

In addition, there may be a variant in which, as shown in FIG. 2, a smartphone 3, comprises a display 12 with touchscreen and a video camera 13.

Consider the operation of the reader 1, which is shown in FIG. 2.

The user, by clicking on the icon on the displays 12 with touchscreen, through special software (STR) turns on the smartphone 3, which activates the scanner of nuclear magnetic resonance (NMR) 2.

An NMR scanner 2, using a transmitting unit 7 and a card 5, includes a control generator, an electronic switch, and a power amplifier (not shown in the drawing). The NFC tag 14, containing the metal transponder 15, receives electromagnetic energy 17 from a transmitting card 5 with a frequency of 1 MHz to 1 GHz.

The metal transponder 15 deposited on the housing of the NFC tag 14 has at least two resonance frequencies and consists, for example, of a ferrimagnetic alloy MgFe ₂ 0 ₄ having the properties of nuclear magnetic resonance due to electric / magnetic dipole or tunnel junctions between Stark - Zeeman levels.

The electromagnetic field formed by coils 5 and 6 of the electromagnet 4 of the NMR scanner 2, of resonant frequency, causes quantum transitions between the magnetic sublevels of the ferrimagnetic alloy MgFe ₂ 0 ₄ .

When placed in a constant magnetic field of an electromagnet 4 NFC tags 14 with a metal transponder 15 (MgFe ₂ 0 ₄ alloy), the magnetic moment of the nucleus system, like a spinning top brought out of a vertical position, moves along the surface of the rotation cone around the field direction axis (precessional motion )

The effect of external alternating electromagnetic radiation 17 with a frequency f0 = 536 MHz on the MgFe ₂ 0 ₄ alloy cores located in the constant magnetic field of electromagnet 4 of the NMR scanner 2 leads to the selective (resonant) absorption of electromagnetic radiation energy and the appearance of NMR signal 18 (Zeeman effect, which is based on the splitting of spectral lines under the influence of a magnetic field) with a frequency fIF = f0 (536 MHz) + 10.7 MHz.

If the NMR scanner 2 detected the presence of a metal transponder 15 (ferrimagnetic alloy MgFe ₂ 0 _4. ) On the case of the NFC tag 14, then it sends a command to the microcontroller 10, which sends an authentication signal to the smartphone 3 through the interface unit 11, i.e. e. The authentication process of the NFC tag 14 coated with the metal transponder 15 was successful.

If the NMR scanner 2 did not detect the presence of a metal-transponder 15 on the NFC-tag body 14, then it does not transmit a command to the microcontroller 10, it is considered that the authentication of the NFC-tag 14 has failed.

After positive authentication, i.e. the authentication process of the microcontroller 14 with the metal transponder 15, the STR automatically starts the activation process of the NFC microprocessor integrated in the smartphone 3 (not shown in the drawing).

The main component of the smartphone’s NFC microprocessor 3 is a wireless NFC interface that communicates directly with the NFC tag 14.

The smartphone’s NFC microprocessor controller 3 (not shown) has an analog radio frequency interface, which includes a transmitter for sending signals at a frequency of 13.56 MHz, a receiver at the same frequency, and another receiver for loading modulated signals at a frequency of 848 kHz. The core of the controller is a microprocessor that processes message protocols.

The smartphone’s NFC microprocessor 3 (not shown in the drawing), through the antenna built into the touchscreen display (not shown in the drawing), described in US patent No. 7928965 of 04/19/2011, transmits energy and receives encrypted data 19 from the NFC tag 14.

Thus, when the smartphone 3 and the NFC tag 14 exchange data, they generate the frequency 19 in turn.

NFC has its own protocol stack. Communication between a smartphone 3 with a built-in NFC microprocessor (not shown in the drawing) and NFC tags 14 using the NFC interface can be carried out only if the transmitted messages have a certain format - NDEF (NFC Data Exchange Format) messages.

Therefore, we cannot encrypt the transmitted message completely - both the body and the header, i.e. it is necessary that the format of the transmitted messages remains correct from the point of view of the NFC controller.

When transmitting data 19, the following occurs:

- At the top of the stack at the application level are crypto protocols. The data to be sent is selected and encrypted.

- In the next step, the data is prepared for sending — special APDUs (Application Protocol Data Unit — application-level protocol data unit) or NDEF messages containing encrypted data are formed.

- When converging devices, a smartphone 3 with a built-in NFC microprocessor (not shown in the drawing) and NFC tags 14, the devices are inductively connected using the alternating magnetic field of one of the devices.

- After the smartphone 3 converges with the built-in NFC microprocessor (not shown in the drawing) and the NFC tag 14, the connection activation and anti-collision protocol is launched.

- After establishing a connection between the smartphone 3 with the built-in NFC microprocessor (not shown in the drawing) and the NFC tag 14, the data transfer protocol is started. There is a transfer of 19 encrypted / signed data in NDEF format.

Installation and creation of a secure channel 19 is determined by cryptographic mechanisms that use the Diffie-Hellman protocol (option) for exchanging key keys and the AES algorithm (option) for encryption.

Using the protocol, a secure channel 19 is created between the smartphone 3 with the built-in NFC microprocessor (not shown in the drawing) and the NFC tag 14.

The secure channel breaks up 19 when the devices are removed from each other by a distance inaccessible for NFC communication.

The general algorithm for installing a secure channel (option) 19 between a smartphone 3 with a built-in NFC microprocessor (not shown in the drawing) and an NFC tag 14:

- Key exchange;

- The formation of a key for encryption;

- Exchange of encrypted messages;

- End of the communication session.

It is proposed to use the Diffie-Hellman protocol (option) for key exchange.

To establish a secure connection between a smartphone 3 with a built-in NFC microprocessor (not shown in the drawing) and an NFC tag 14, two numbers are selected together that are not secret and may also be known to other interested parties. In order to create a secret key unknown to anyone else, the smartphone 3 and the NFC tag 14 generate large random numbers.

The transmitted data is encrypted by the AES algorithm in the mode of coupling of cipher blocks (Cipher Block Chaining - SHS). AES is an encryption algorithm for 128-bit data blocks with keys of 128, 192 and 256 bits.

In SHS mode, the encryption result of the previous block is added to each block of plaintext before encryption using the bitwise operation XOR [(bitwise exclusive OR (XOR)]. An initialization vector is added to the first block of plaintext, which is generated randomly and is usually transmitted together with encrypted data so that they can be decrypted.

In SHS mode, to encrypt each next block, you must have the encryption result of the previous block, so you cannot encrypt multiple blocks at the same time. But you can decrypt several blocks in parallel, because to decrypt each block you need to have only this block and the previous one.

The cryptographic method of exchanging information in identification-based NFC technology is widely known in the art and is described, for example, in the journal: Special Equipment and Communications, No. 6, 2013, pp. 36-39, in an article by A. Mikhailov and et al. “Secure methods for exchanging information in RFID systems,” in A. Shamir, Identity-based Cryptosystems and Signature Schemes, Proceedings of CRYPTO'84, LNCS 196, pages 47-53, Springer Verlag, 1984.

To obtain information about the NFC tag 14, a cellular communication network 23 is used.

For the smartphone 3 to work in protected mode, the method described in the journal: "Special equipment and communications", No. 6 for 2013, p. 36-39, in the article by A. Mikhailov et al. “Safe ways of exchanging information in systems” can be used radio frequency identification. "

Smartphone 3 has a built-in NFC microprocessor, which has a pseudo-random number generator (PRNS) [True Random Number Generators] (not shown in the drawing). Authentication Process:

1. A smartphone 3 with an integrated NFC microprocessor generates a pseudo-random string r1 (-R {0,1} ₁ and sends it to Ti to the NFC tag 14.

2. The NFC tag 14 generates a random string r2 (-R {0,1} 1 and calculates M1 = ti XOR r2 and M2 = Eti (r1 XOR r2). After that, Ti NFC tag 14 sends M1 and M2 to the smartphone 3 s built-in NFC microprocessor.

3. A smartphone 3 with an integrated NFC microprocessor sends (data 21) strings M1, M2 and r1 to server 24.

4. Server 24 receives data 21 transmitted to it from a smartphone 3 with a built-in NFC microprocessor and performs the following sequence of actions.

4.1. Server 24 searches the database based on the values of M1, M2, and r1:

a) first, the server 24 selects ti from the values of ti new or ti old, which are stored in the database;

b) based on the selected value, the server 24 calculates M'2 = Eti (r1 XOR r2), where r2 = M1 XOR ti;

c) if M'2 = M2, then Ti NFC tag 14 is successfully identified and step (4.3) is performed. If no match is found, then go to step (a).

4.2. If no matches are found, then the server 24 sends a message 26 to the smartphone 3 with the built-in NFC microprocessor about the failure of the authentication process.

4.3. Server 24 calculates M3 = ui XOR r2 and sends this value from Di to smartphone 3 with a built-in NFC microprocessor.

4.4. Server 24 updates the value (ui, ti) old for Ti NFC tags 14, replacing them with the value (ui, ti) new, and sets new values ui new = ui XOR ti XOR r1 XOR r2 and ti new = h (ui new) .

5. A smartphone 3 with an integrated NFC microprocessor directs the MOH Ti to the NFC tag.

6. The NFC tag 14 computes ui = M3 XOR r2 and verifies that h (ui) = ti.

If the check is successful, this means that the NFC tag 14 authenticated the server 24. After that, the NFC tag 14 sets ti = h (ui) XOR ti XOR r1 XOR r2.

If the test fails, then the NFC tag 14 does not change the current value of ti.

In describing the protocol, the following notation was used: h (x) is a hash function that maps a sequence of bits of length 1 to a sequence of bits of length 1; S = Ek (m) - message authentication code; Ek - MAC calculation function (Media Access Control - medium access control); N is the total number of NFC tags; 1 - the length of the identifier of the NFC tag; Ti - NFC-tag with the number i (1 <i <N); Di information recorded in a Ti NFC tag; ui is a 1-bit string associated with an NFC tag; ti = h (ui) - identifier tag string Ti of the NFC tag; r is a string of 1 bits.

This protocol allows you to solve a number of the following problems of modern NFC-systems.

1. Information from the NFC tag 14 cannot be stolen, nor can it be replaced, since it is stored on server 24, which, according to assumptions, is safe (security server).

2. Server 24 and smartphone 3 with a built-in NFC microprocessor exchange data 21 and 26 through a closed channel. Only the server 24 authorized to read the information can extract the identifier ti from the information transmitted by the NFC tag 14. The server 24 will immediately provide the smartphone 3 with the integrated NFC microprocessor with Di data in case of successful identification.

3. With the introduction of this authentication protocol, it becomes impossible to unauthorizedly track the movement of the NFC tag 14. After all, everything that a smartphone 3 with an integrated NFC microprocessor can receive when querying the NFC tag 14 is pseudorandom numbers.

Smartphone 3 transmits information data received from the NFC tag 14 through the base stations 22 of the cellular communication network 23 to the servers 24 and 25 with a distributed database (Distributed DataBase - DDB).

DDB (not shown in the drawing) is a single database of NFC tags, and not an arbitrary set of files that are individually stored on different network nodes and is a distributed file system. Data is DDB only if it is connected in accordance with some structural formalism, relational model, and access to it is provided by a single high-level interface.

DDB data through the server 24 and 25 is transmitted to the elements (not shown) of the cellular communication network 23, then through the base stations 22 information data 26 is transmitted to the smartphone 3 and displayed on the display 12.

The user can know all the data not only about the NFC tag 14, but also about the origin of the goods on which the NFC tag 14 is located.

In view of the fact that in a particular embodiment, the smartphone 3 includes a touchscreen display 12, an integrated NFC microprocessor, a video camera 13, it is possible to read a QR code 16 glued to an NFC tag 14 with a metal transponder 15.

The operation of the reader 1 for scanning the QR code is similar to the authentication process described above on the case of the NFC tag 14 with the metal transponder 15. The QR code 16 is read by the reader 1 in the following sequence:

authentication of the NFC tag 14 with the metal transponder 15 occurs. A description of the authentication of the NFC tag 14 with the metal transponder 15 has been described above. If the NMR scanner 2 detected the presence of a metal transponder 15 (ferrimagnetic alloy MgFe ₂ 0 _4. ) On the case of the NFC tag 14, then it sends a command to the microcontroller 10, which sends a positive authentication signal through the interface unit 11, i.e. The authentication process of the NFC tag 14 coated with the metal transponder 15 was successful.

- after conducting positive authentication, using the video camera 13 of the smartphone 3, the user uses the STR to turn on the video camera 3, the QR code 16 is automatically read, containing information about the object to which it is attached.

- using the NFC microprocessor built into the smartphone 3, the process of reading data from the NFC tag 14, which was described above in the utility model, takes place.

The technology of cryptographic tags (Cryptographic Labels Technology) will allow users using reader 1 to trace the entire path of an object with NFC-tag 14: confidential documents, food, medicine or goods, from its production to the time of sale or storage.

The cryptographic tag reader 1 is powered by the battery (not shown) of the smartphone 3.

The reader 1 allows you to have multifunctionality mode and work with various identification tags: NFC-tag 14, QR-tag 16, NMR reader 2. The presence in the smartphone 3 of the built-in modem for use in a cellular communication network (not shown) and display 12, allows receive the user from distributed databases hosted on servers 24 and 25, not only text data, but also photo and video files about the object with the NFC cryptographic tag set 14. The user has the ability to control a simple click on the display with a touch screen (t ouchscreen) 12 not only the process of the reader 1, but also the data obtained, enter them, if necessary, into the memory of the smartphone 1, which is convenient for the operation of the reader 1.

Thus, the technical result of the utility model is achieved: expanding the functionality and improving the usability of the reader 1.

The manufacture of the reader 1 shown in the drawings of FIG. 1 and FIG. 2, is carried out from typical electronic components and typical products of manufacturers. Smartphone 3 can be used typical Apple iPhone 6/7/8, which uses NFC Reader ICs NXP 65V10. As the NFC tag 14, the microprocessor MF3D (H) x2 or the Russian microprocessor MIK213ND can be used.

As can be seen from the drawing of FIG. 2, a prototype reader 1 was manufactured. Tests have shown that the reader 1 meets the requirements for NFC / QR readers.

Claims (2)

1. A cryptographic tag reader, comprising a transmitting unit, an electromagnet consisting of a transmitting coil designed to irradiate a metal transponder with an electromagnetic wave of a first frequency, a receiving coil designed to receive a second frequency from a metal transponder, a receiving unit, a pulse generator, characterized in which additionally contains a microcontroller designed to control the operation of the blocks, an interface unit, a smartphone, designed to receive and transmit data over cellular communication networks, select data, read data from radio-frequency contactless microprocessors, while the first output of the transmitting unit is connected to the first input of the transmitting coil of the electromagnet, the second output of which is connected to ground of the general circuit, the first output of the receiving coil of the electromagnet is connected to the fourth input of the receiving unit, the second output of the receiving coil the electromagnet is connected to the ground of the general circuit, the second output of the transmitting unit is connected to the first input of the receiving unit, the second output of which is connected from the first the input of the microcontroller, the second input-output of which is connected to the first input-output of the interface unit, the second input-output of the interface unit is connected to the first input-output of the smartphone, while the first output of the pulse generator is connected to the third and fourth input of the transmitting unit, the fifth input of which is connected with the third output of the microcontroller, while the second output of the pulse generator is connected to the third input of the receiving unit. 2. The cryptographic tag reader according to claim 1, characterized in that said smartphone comprises a touchscreen display, a built-in contactless microcircuit of a radio-frequency contactless microprocessor, and a video camera.

Images