CN116227514A - Electronic label and its signal transmission method, radio frequency system and its signal transmission method - Google Patents

Abstract

The invention discloses an electronic label and its signal transmission method, a radio frequency system and its signal transmission method. Among them, the signal transmission method of the electronic tag includes: when the electronic tag receives the read and write instructions of the reader, the electronic tag updates the operation factor in its storage unit; the electronic tag uses the updated operation factor and the initial secret key according to the first The preset algorithm is calculated to obtain the current secret key; the electronic tag sends the current encrypted data and the current secret key in the storage unit to the reader. The technical solution of the embodiment of the present invention solves the problem that the secret key of the electronic tag is easily leaked and the security of the electronic tag is poor, and effectively improves the security of the electronic tag.

Description

Electronic label and its signal transmission method, radio frequency system and its signal transmission method

technical field

The invention relates to the technical field of electronic tags, in particular to an electronic tag and a signal transmission method thereof, a radio frequency system and a signal transmission method thereof.

Background technique

Radio Frequency Identification (RFID) is a kind of automatic identification technology. It uses radio frequency to perform non-contact two-way data communication, and uses radio frequency to read recording media (electronic tags or radio frequency cards). It can achieve wireless identification and data exchange, so it has been widely used.

For electronic tags with safety certification, the secret key is generally solidified into the chip. For example, a method for encrypting and anti-counterfeiting radio frequency electronic tag data provided by patent document CN02158933. The UID identification code (equivalent to a secret key) is read from the read-only memory, and then new data (equivalent to encrypted data) is generated after logic operations, and finally the generated new data is written into the readable and writable user memory. For the data encrypted by this method, if multiple sets of encrypted data are obtained, the secret key can be obtained more easily, so as to decrypt the encrypted data. Therefore, if the secret key is solidified into the chip, the secret key of the electronic tag is easily leaked, and the security of the electronic tag is poor.

Contents of the invention

The invention provides an electronic label and its signal transmission method, a radio frequency system and its signal transmission method, in order to solve the problems that the secret key of the electronic label is easily leaked and the security of the electronic label is poor.

According to one aspect of the present invention, an information transmission method of an electronic tag is provided, including:

When the electronic tag receives the read/write instruction from the reader/writer, the electronic tag updates the operation factor in its storage unit;

The electronic tag calculates the updated operation factor and the initial secret key according to the first preset algorithm to obtain the current secret key;

The electronic tag sends the current encrypted data and the current secret key in the storage unit to the reader.

Optionally, the electronic tag sends the current encrypted data and the current key in the storage unit to the reader, including:

The electronic tag uses the initial encrypted data in the storage unit as the current encrypted data, and sends the current encrypted data and the current secret key to the reader; wherein, the initial encrypted data is The data encrypted with the initial key.

Optionally, the electronic tag sends the current encrypted data and the current key in the storage unit to the reader, including:

The electronic tag uses the current secret key to encrypt the initial encrypted data in the storage unit to obtain the current encrypted data;

The electronic tag sends the current encrypted data and the current secret key to the reader.

Optionally, when the electronic tag receives a read/write instruction from the reader/writer, the electronic tag updates the calculation factor in its storage unit, including:

When the electronic tag receives a read/write instruction from the reader/writer, the electronic tag reads the operation factor from the storage unit;

The electronic tag updates the operation factor according to a second preset algorithm, and writes the updated operation factor into the storage unit.

Optionally, the electronic tag updates the operation factor according to a second preset algorithm, including:

The electronic tag adds or subtracts the operation factor to a preset value to obtain an updated operation factor;

Alternatively, the electronic tag performs an XOR operation on the operation factor and the preset value to obtain an updated operation factor.

Optionally, when the electronic tag receives the read-write instruction from the reader-writer, before the electronic tag updates the operation factor in its storage unit, it further includes:

The electronic tag encrypts the data in the storage unit according to the initial key to obtain the initial encrypted data.

Optionally, before encrypting the data in the storage unit according to the initial key to obtain the initial encrypted data, the method further includes:

The electronic tag is initialized to obtain the initial secret key.

According to another aspect of the present invention, an electronic tag is provided for performing the signal transmission method of the electronic tag described in any embodiment of the present invention, the electronic tag includes: an antenna, a storage unit, and a logic unit;

The logic unit is used to update the operation factor in the storage unit when the electronic tag receives a read/write command from the reader/writer through the antenna;

The logic unit is also used to calculate the updated operation factor and the initial secret key according to the first preset algorithm to obtain the current secret key;

The antenna is used to send the current encrypted data and the current secret key in the storage unit to the reader.

According to another aspect of the present invention, a signal transmission method of a radio frequency system is provided, and the radio frequency system includes the electronic tag, reader and server described in any embodiment of the present invention;

The signal transmission method of the radio frequency system includes:

The reader-writer sends a read-write command;

The electronic tag updates the operation factor in its storage unit;

The electronic tag calculates the updated operation factor and the initial secret key according to the first preset algorithm to obtain the current secret key;

The electronic tag sends the current encrypted data and the current secret key in the storage unit to the reader;

The reader-writer sends the acquired current secret key and the current encrypted data to the server;

The server decrypts the current encrypted data according to the initial key and the current key, or decrypts the current encrypted data according to the initial key.

According to another aspect of the present invention, a radio frequency system is provided, and the radio frequency system includes the electronic tag, the reader-writer and the server described in any embodiment of the present invention, and is used to implement the electronic tag described in any embodiment of the present invention. Signal transmission methods for radio frequency systems;

The electronic tag is connected in communication with the reader, and the reader is used to send read and write instructions to the electronic tag to obtain the current encrypted data and the current secret key in the electronic tag;

The server is connected in communication with the reader, and the reader is further configured to send the obtained current secret key and the current encrypted data to the server; the server is configured to The secret key and the current secret key decrypt the current encrypted data, or decrypt the current encrypted data according to the initial secret key.

In the technical solution provided by the embodiment of the present invention, when the electronic tag receives the read and write instructions from the reader, the electronic tag updates the operation factor in its storage unit; the electronic tag uses the updated operation factor and the initial secret key according to the first The preset algorithm is calculated to obtain the current secret key; the electronic tag sends the current encrypted data in the storage unit and the current secret key to the reader, so that the current secret key obtained each time is different, and each transmission is The current encrypted data after encryption, the current encrypted data is encrypted with the initial key, and this transmission is the current key, so even if the current encrypted data and the current key are intercepted, the initial data cannot be parsed; or, the current encrypted The data is encrypted with the initial secret key and the current secret key, and only the current secret key is transmitted this time, so even if the current encrypted data and the current secret key are intercepted, the initial data cannot be parsed. Therefore, the effect of secure transmission can be achieved without fear of leakage of the secret key, the reliability of electronic tag signal transmission is improved, and the security of the communication link is guaranteed. Moreover, the storage unit of the electronic tag of the present application stores encrypted data, which improves the security of electronic tag data storage, makes the electronic tag more secure, and further improves the reliability of the electronic tag. The technical solution of the embodiment of the present invention solves the problem that the secret key of the electronic tag is easily leaked and the security of the electronic tag is poor, and effectively improves the security of the electronic tag.

It should be understood that the content described in this section is not intended to identify key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will be easily understood from the following description.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

FIG. 1 is a flowchart of a signal transmission method of an electronic tag provided by an embodiment of the present invention.

Fig. 2 is a flowchart of another signal transmission method of an electronic tag provided by an embodiment of the present invention.

Fig. 3 is a flowchart of another signal transmission method of an electronic tag provided by an embodiment of the present invention.

Fig. 4 is a flowchart of another signal transmission method of an electronic tag provided by an embodiment of the present invention.

Fig. 5 is a flowchart of another signal transmission method of an electronic tag provided by an embodiment of the present invention.

Fig. 6 is a flowchart of another signal transmission method of an electronic tag provided by an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of an electronic tag provided by an embodiment of the present invention.

FIG. 8 is a flowchart of a signal transmission method for a radio frequency system according to an embodiment of the present invention.

FIG. 9 is a schematic structural diagram of a radio frequency system provided by an embodiment of the present invention.

Detailed ways

In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

The technical solution of this embodiment provides a signal transmission method of an electronic tag. Fig. 1 is a flow chart of a signal transmission method of an electronic tag provided by an embodiment of the present invention. As shown in Fig. 1, the method includes:

S110. When the electronic tag receives the read/write instruction from the reader/writer, the electronic tag updates the operation factor in its storage unit.

Wherein, the electronic tag includes a storage unit, and the storage unit stores product information of the product where the electronic tag is located. The electronic tag can carry out radio frequency communication with the reader. When the electronic tag enters the field of the reader, the electronic tag is powered on, and the reader can read and write the electronic tag to obtain the product information of the product where the electronic tag is located. It is also possible to modify the information in the electronic label. The operation factor is, for example, data pre-stored in the storage unit before leaving the factory. The operation factor can be one-bit decimal data, multi-bit binary data, or other types of data, which is not limited in this embodiment.

Specifically, when the electronic tag receives the read and write instructions from the reader, that is, when the electronic tag communicates with the reader, the electronic tag updates the calculation factor in its storage unit to obtain the updated calculation factor, which is convenient for use. The operation factor updates the secret key, so that the secret key transmitted each time the electronic tag communicates with the reader is different.

S120. The electronic tag calculates the updated operation factor and the initial secret key according to a first preset algorithm to obtain the current secret key.

Among them, the initial secret key can be specifically understood as the secret key obtained after the chip is processed into an electronic tag and the electronic tag is initialized. The initial secret key is stored in the storage unit of the electronic tag; the first preset algorithm is, for example, pre-stored in The algorithm in the electronic tag, the first preset algorithm includes, for example, at least one of addition, subtraction, multiplication, division, and XOR algorithm, and the updated operation factor and the initial secret key are calculated according to the first preset algorithm, for example Perform addition, subtraction, multiplication, division or XOR operations on the operation factor and the preset value for the electronic tag.

Specifically, the electronic tag calculates the updated initial secret key of the operation factor according to the first preset algorithm, which may be calculated once or multiple times, so as to obtain the current secret key. By determining the current secret key, the secret key transmitted each time the electronic tag communicates with the reader is different. Even if the secret key during communication is intercepted, the law cannot be obtained, that is, the secret key and data cannot be analyzed, which improves the The security of electronic tag signal transmission.

S130. The electronic tag sends the current encrypted data and the current secret key in the storage unit to the reader.

Specifically, the current encrypted data is, for example, the initial encrypted data in the storage unit, and the initial encrypted data is the data encrypted with the initial key; when the electronic tag communicates with the reader, the initial encrypted data and the current key are transmitted, Even if the communication data is intercepted by equipment such as an oscilloscope, the initial encrypted data cannot be analyzed by using the intercepted current secret key, which effectively improves the reliability and security of electronic tag information transmission and ensures the security of the communication link. Alternatively, the current encrypted data can also be the electronic tag using the current secret key to encrypt the initial encrypted data in the storage unit, and the obtained data can be encrypted twice; therefore, when the electronic tag communicates with the reader, the transmission What is important is the current encrypted data and the current secret key after two encryptions. Even if the communication data is intercepted, the current encrypted data cannot be analyzed only with the current secret key, which can prevent the secret key from leaking and effectively improve the efficiency of electronic tag information transmission. Reliability and security, ensuring the security of the communication link. Moreover, encrypted data is stored in the storage unit instead of initial data, so the security of electronic tag data storage is improved, the security and reliability of electronic tags are further improved, and data leakage and product information leakage are further prevented.

In the technical solution provided by the embodiment of the present invention, when the electronic tag receives the read and write instructions from the reader, the electronic tag updates the operation factor in its storage unit; the electronic tag uses the updated operation factor and the initial secret key according to the first The preset algorithm is calculated to obtain the current secret key; the electronic tag sends the current encrypted data in the storage unit and the current secret key to the reader, so that the current secret key obtained each time is different, and each transmission is The current encrypted data after encryption, the current encrypted data is encrypted with the initial key, and this transmission is the current key, so even if the current encrypted data and the current key are intercepted, the initial data cannot be parsed; or, the current encrypted The data is encrypted with the initial secret key and the current secret key, and only the current secret key is transmitted this time, so even if the current encrypted data and the current secret key are intercepted, the initial data cannot be parsed. Therefore, the effect of secure transmission can be achieved without fear of leakage of the secret key, the reliability of electronic tag signal transmission is improved, and the security of the communication link is guaranteed. Moreover, the storage unit of the electronic tag of the present application stores encrypted data, which improves the security of electronic tag data storage, makes the electronic tag more secure, and further improves the reliability of the electronic tag. The technical solution of the embodiment of the present invention solves the problem that the secret key of the electronic tag is easily leaked and the security of the electronic tag is poor, and effectively improves the security of the electronic tag.

On the basis of the above technical solution, the current encrypted data can be the initial encrypted data, or it can be the data after the initial encrypted data is re-encrypted with the current secret key. The signal transmission method of the electronic tag is carried out in combination with the determination method of the current encrypted data. description, but not as a limitation of the application.

In one embodiment, FIG. 2 is a flow chart of another signal transmission method of an electronic tag provided in an embodiment of the present invention. As shown in FIG. 2 , the method includes:

S210. When the electronic tag receives the read/write instruction from the reader/writer, the electronic tag updates the operation factor in its storage unit.

S220. The electronic tag calculates the updated operation factor and the initial secret key according to a first preset algorithm to obtain the current secret key.

S230. The electronic tag uses the initial encrypted data in the storage unit as the current encrypted data, and sends the current encrypted data and the current secret key to the reader/writer.

Specifically, the current encrypted data is, for example, the initial encrypted data in the storage unit, and the initial encrypted data is the data encrypted with the initial key; when the electronic tag communicates with the reader, the initial encrypted data and the current key are transmitted, Even if the communication data is intercepted by equipment such as an oscilloscope, the initial encrypted data cannot be analyzed by using the intercepted current secret key, which effectively improves the reliability and security of electronic tag information transmission and ensures the security of the communication link. Moreover, the data is only encrypted once, which simplifies the operation process, so that after the electronic tag receives the read and write instructions from the reader, it can quickly send encrypted data to the reader, which is conducive to improving user experience.

In another implementation manner, FIG. 3 is a flow chart of another electronic tag signal transmission method provided by an embodiment of the present invention. As shown in FIG. 3 , the method includes:

S310. When the electronic tag receives the read/write instruction from the reader/writer, the electronic tag updates the operation factor in its storage unit.

S320. The electronic tag calculates the updated operation factor and the initial secret key according to a first preset algorithm to obtain the current secret key.

S330. The electronic tag uses the current secret key to encrypt the initial encrypted data in the storage unit to obtain the current encrypted data; the electronic tag sends the current encrypted data and the current secret key to the reader.

Specifically, the electronic tag uses the current secret key to encrypt the initial encrypted data in the storage unit, and the obtained data can be encrypted twice. After the two encryptions, the security of the data is further improved, even if the oscilloscope Even if the device is forcibly cracked, the original data cannot be obtained, which further improves the security of the electronic tag. Therefore, when the electronic tag communicates with the reader, the current encrypted data and the current secret key after two encryptions are transmitted. Even if the communication data is intercepted, the current encrypted data cannot be analyzed only with the current secret key, which can prevent Product information leakage effectively improves the reliability and security of electronic tag information transmission and ensures the security of communication links.

On the basis of the above technical solutions, Fig. 4 is a flow chart of another electronic tag signal transmission method provided by the embodiment of the present invention. As shown in Fig. 4, the method includes:

S410. When the electronic tag receives a read/write instruction from the reader/writer, the electronic tag reads the operation factor from the storage unit.

Specifically, the electronic tag includes, for example, a logic unit, the logic unit can perform calculation operations, and the logic unit and the storage unit can interact. The operation factor is stored in the storage unit. When the operation factor is to be updated, the logic unit of the electronic tag must first read the operation factor from the storage unit, and then perform calculation.

S420. The electronic tag updates the operation factor according to the second preset algorithm, and writes the updated operation factor into the storage unit.

Wherein, the second preset algorithm is, for example, an algorithm pre-stored in the electronic tag, and the second preset algorithm includes, for example, at least one of addition, subtraction, multiplication, division, and XOR algorithms.

Specifically, the electronic tag calculates the operation factor according to the second preset algorithm, which can be calculated once or multiple times to obtain a new operation factor, and then writes the updated operation factor into the storage unit, so that the logic unit can change from The updated operation factor is obtained from the storage unit, so as to use the updated operation factor to update the secret key.

S430. The electronic tag calculates the updated operation factor and the initial secret key according to a first preset algorithm to obtain the current secret key.

S440. The electronic tag sends the current encrypted data and the current secret key in the storage unit to the reader.

Fig. 5 is a flowchart of another electronic tag signal transmission method provided by an embodiment of the present invention. As shown in Fig. 5, the method includes:

S510. When the electronic tag receives a read/write instruction from the reader/writer, the electronic tag reads the operation factor from the storage unit.

S520. The electronic tag adds or subtracts the operation factor to the preset value to obtain an updated operation factor; or, the electronic tag performs an XOR operation on the operation factor and the preset value to obtain an updated operation factor.

Specifically, the preset value can be 1, 2, 3, or other values. The preset value can also be multi-bit binary data or other types of data. The electronic tag will calculate The factor is added or subtracted from the preset value to obtain the updated operation factor. This operation method makes the system operation time short and the operation speed fast; or, the electronic tag performs XOR operation on the operation factor and the preset value to obtain the new operation factor. The calculation factor is convenient to use the current secret key obtained by the updated calculation factor, and the XOR operation is more complicated, which makes it difficult to parse the current secret key, thereby making the electronic tag more secure.

S530. The electronic tag calculates the updated operation factor and the initial secret key according to a first preset algorithm to obtain the current secret key.

S540. The electronic tag sends the current encrypted data and the current secret key in the storage unit to the reader.

As a further implementation of this embodiment, on the basis of the above technical solutions, FIG. 6 is a flow chart of another electronic tag signal transmission method provided by the embodiment of the present invention. As shown in FIG. 6, the method includes:

S610. The electronic tag is initialized to obtain an initial secret key.

Specifically, first process the chip and antenna into an electronic tag, and initialize the electronic tag to obtain the initial secret key, which is stored in the storage unit of the electronic tag, so that the electronic tag can obtain the initial encrypted data according to the initial secret key , with the initial encrypted data combined with the current secret key, when transmitting, transmit the initial encrypted data and the current secret key, or transmit the current secret key and the data encrypted by the current secret key to the initial encrypted data, so that even if the oscilloscope and other equipment are used to intercept For communication data, the intercepted current secret key cannot be used to analyze the initial encrypted data, which effectively improves the reliability and security of electronic tag information transmission and ensures the security of the communication link.

S620. The electronic tag encrypts the data in the storage unit according to the initial key to obtain initial encrypted data.

Specifically, the electronic tag encrypts the data in the storage unit according to the initial secret key to obtain the initial encrypted data. Since the initial encrypted data at this time is obtained after encryption compared with the initial data, the storage capacity of the electronic tag data is improved. The safety of the electronic label is further improved, and the safety and reliability of the electronic label are further improved to further prevent data leakage and product information leakage.

S630. When the electronic tag receives the read/write instruction from the reader/writer, the electronic tag updates the operation factor in its storage unit.

S640. The electronic tag calculates the updated operation factor and the initial secret key according to a first preset algorithm to obtain the current secret key.

S650. The electronic tag sends the current encrypted data and the current secret key in the storage unit to the reader.

The technical solution of this embodiment also provides an electronic tag. FIG. 7 is a schematic structural diagram of an electronic tag provided by an embodiment of the present invention. The electronic tag is used to implement the signal transmission method of the electronic tag in any embodiment of the present invention, such as As shown in Figure 7, the electronic tag includes: an antenna 710, a storage unit 720, and a logic unit 730; the logic unit 730 is used to update the operation in the storage unit 720 when the electronic tag receives a read and write command from the reader through the antenna 710 factor; the logic unit 730 is also used to calculate the updated operation factor and the initial secret key according to the first preset algorithm to obtain the current secret key; the antenna 710 is used to send the current encrypted data and the current secret key in the storage unit 720 to reader.

Wherein, the electronic tag includes an antenna 710 and a chip 711 , and the chip 711 includes a storage unit 720 and a logic unit 730 . The storage unit 720 is used to store the operation factor and the product information of the product where the electronic tag is located. The session key can be generated through logical operation with the logic unit 730, and the operation factor can also be rewritten; the logic unit 730 includes an oscillation module, a filter module, an amplification module, modulation module, demodulation module, D/A module, and A/D module functions; the logic unit 730 also includes an operation factor rewriting module and a current secret key generation module.

Specifically, the electronic tag performs wireless radio frequency communication with the reader through the antenna 710. When the electronic tag receives a read and write instruction from the reader, that is, when the electronic tag and the reader have a conversation, the operation factor rewriting module of the logic unit 730 The operation factor in the storage unit 720 is updated to obtain the updated operation factor, and the current secret key generation module of the logic unit 730 calculates the initial key of the updated operation factor according to the first preset algorithm to obtain the current secret key. By determining the current secret key, the secret key transmitted each time the electronic tag communicates with the reader is different. Even if the secret key during communication is intercepted, the law cannot be obtained, that is, the secret key and data cannot be analyzed, which improves the The security of electronic tag signal transmission.

In addition, the electronic tag also includes a radio frequency analog front end 740, wherein the radio frequency analog front end 740 includes a rectification module, a voltage stabilization module, a clock module, a demodulation module, a power-on reset module, a modulation module, a tuning capacitor, and a random number generator.

In the technical solution provided by the embodiment of the present invention, the electronic tag includes: an antenna, a storage unit, and a logic unit; wherein, the logic unit is used to update the calculation factor in the storage unit when the electronic tag receives a read/write instruction from the reader/writer through the antenna ; The logic unit is also used to calculate the updated operation factor and the initial secret key according to the first preset algorithm to obtain the current secret key; the antenna is used to send the current encrypted data and the current secret key in the storage unit to the reader; Since each transmission is the encrypted current encrypted data, the current encrypted data is encrypted with the initial secret key, and this transmission is the current secret key, so even if the current encrypted data and the current secret key are intercepted, it cannot be parsed out. Initial data; or, the current encrypted data is encrypted with the initial secret key and the current secret key, and only the current secret key is transmitted this time, so even if the current encrypted data and the current secret key are intercepted, the initial data cannot be parsed; therefore, it can be achieved The effect of secure transmission, without fear of key leakage, improves the reliability of electronic tag signal transmission and ensures the security of communication links. Moreover, the storage unit of the electronic tag of the present application stores encrypted data, which improves the security of electronic tag data storage, makes the electronic tag more secure, and further improves the reliability of the electronic tag. The technical solution of the embodiment of the present invention solves the problem that the secret key of the electronic tag is easily leaked and the security of the electronic tag is poor, and effectively improves the security of the electronic tag.

This embodiment also provides a signal transmission method of a radio frequency system. FIG. 8 is a flow chart of a signal transmission method of a radio frequency system provided by an embodiment of the present invention, wherein the radio frequency system includes: an electronic tag, a reader-writer and a server , as shown in Figure 8, the method includes the following steps:

S810. The reader/writer sends a read/write instruction.

S820. The electronic tag updates the operation factor in its storage unit.

S830. The electronic tag calculates the updated operation factor and the initial secret key according to a first preset algorithm to obtain the current secret key.

S840. The electronic tag sends the current encrypted data and the current secret key in the storage unit to the reader.

S850. The reader/writer sends the obtained current secret key and current encrypted data to the server.

S860. The server decrypts the current encrypted data according to the initial secret key and the current secret key, or decrypts the current encrypted data according to the initial secret key.

Specifically, the server pre-stores the initial secret key, for example, before the electronic tag and the reader have this session, the initial secret key is sent to the server in advance. If the current encrypted data is the initial encrypted data, the server uses the initial key to decrypt the current confidential data, thereby parsing the original data, that is, the initial data. If the current encrypted data is the data obtained by encrypting the initial encrypted data with the current secret key, the server decrypts the current encrypted data according to the initial secret key and the current secret key, thereby parsing out the original data (initial data), which is convenient for the user to obtain the location of the electronic tag. The product information of the product is convenient for counterfeit verification and traceability, so that users can know the status of the product, that is, whether the product has been used, etc., which is conducive to improving the user experience.

In the technical solution provided by the embodiment of the present invention, a read-write command is sent through a reader-writer; the electronic tag updates the operation factor in its storage unit; the electronic tag calculates the updated operation factor and the initial secret key according to the first preset algorithm, and obtains The current secret key; the electronic tag sends the current encrypted data and the current secret key in the storage unit to the reader; the reader sends the acquired current secret key and the current encrypted data to the server; the server key to decrypt the current encrypted data, or, according to the initial key to decrypt the current encrypted data. Since each transmission is the encrypted current encrypted data, the current encrypted data is encrypted with the initial secret key, and this transmission is the current secret key, so even if the current encrypted data and the current secret key are intercepted, it cannot be parsed out. Initial data; or, the current encrypted data is encrypted with the initial secret key and the current secret key, and only the current secret key is transmitted this time, so even if the current encrypted data and the current secret key are intercepted, the initial data cannot be parsed; therefore, it can be achieved The effect of secure transmission, without fear of key leakage, improves the reliability of electronic tag signal transmission and ensures the security of communication links. Moreover, the storage unit of the electronic tag of the present application stores encrypted data, which improves the security of electronic tag data storage, makes the electronic tag more secure, and further improves the reliability of the electronic tag. The technical solution of the embodiment of the present invention solves the problem that the secret key of the electronic tag is easily leaked and the security of the electronic tag is poor, and effectively improves the security of the electronic tag.

The technical solution of this embodiment also provides a radio frequency system. Figure 9 is a schematic structural diagram of a radio frequency system provided by an embodiment of the present invention. As shown in Figure 9, the radio frequency system includes: an electronic tag 910, a reader 920 and a server 930, and the radio frequency system is used to implement any implementation of the present invention The signal transmission method of the radio frequency system of example;

The electronic tag 910 is connected in communication with the reader-writer 920, and the reader-writer 920 is used to send read and write instructions to the electronic tag 910 to obtain the current encrypted data and the current secret key in the electronic tag 910;

The server 930 is connected in communication with the reader-writer 920, and the reader-writer 920 is also used to send the acquired current secret key and current encrypted data to the server 930; the server 930 is used to process the current encrypted data according to the initial secret key and the current secret key Decrypt, or, decrypt the current encrypted data according to the original key.

In the technical solution provided by the embodiment of the present invention, the electronic tag is communicated with the reader, and the reader is used to send read and write instructions to the electronic tag to obtain the current encrypted data and the current secret key in the electronic tag; the server and the reader The reader is also used to send the acquired current secret key and current encrypted data to the server; the server is used to decrypt the current encrypted data according to the initial secret key and the current secret key, or, according to the initial secret key pair The currently encrypted data is decrypted. Moreover, each transmission is the encrypted current encrypted data, the current encrypted data is encrypted with the initial key, and this transmission is the current key, so even if the current encrypted data and the current key are intercepted, it cannot be parsed or, the current encrypted data is encrypted with the initial secret key and the current secret key, and only the current secret key is transmitted this time, so even if the current encrypted data and the current secret key are intercepted, the initial data cannot be parsed; therefore, you can To achieve the effect of safe transmission, no fear of secret key leakage, improve the reliability of electronic tag signal transmission, and ensure the security of communication links. Moreover, the storage unit of the electronic tag of the present application stores encrypted data, which improves the security of electronic tag data storage, makes the electronic tag more secure, and further improves the reliability of the electronic tag. The technical solution of the embodiment of the present invention solves the problem that the secret key of the electronic tag is easily leaked and the security of the electronic tag is poor, and effectively improves the security of the electronic tag.

It should be understood that steps may be reordered, added or deleted using the various forms of flow shown above. For example, each step described in the present invention may be executed in parallel, sequentially, or in a different order, as long as the desired result of the technical solution of the present invention can be achieved, there is no limitation herein.

The above specific implementation methods do not constitute a limitation to the protection scope of the present invention. It should be apparent to those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made depending on design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A signal transmission method of an electronic tag, characterized in that, comprising: When the electronic tag receives the read/write instruction from the reader/writer, the electronic tag updates the operation factor in its storage unit; The electronic tag calculates the updated operation factor and the initial secret key according to the first preset algorithm to obtain the current secret key; The electronic tag sends the current encrypted data and the current secret key in the storage unit to the reader. 2. The method according to claim 1, wherein the electronic tag sends the current encrypted data and the current secret key in the storage unit to the reader, including: The electronic tag uses the initial encrypted data in the storage unit as the current encrypted data, and sends the current encrypted data and the current secret key to the reader; wherein, the initial encrypted data is The data encrypted with the initial key. 3. The method according to claim 1, wherein the electronic tag sends the current encrypted data and the current secret key in the storage unit to the reader, comprising: The electronic tag uses the current secret key to encrypt the initial encrypted data in the storage unit to obtain the current encrypted data; The electronic tag sends the current encrypted data and the current secret key to the reader. 4. The method according to claim 1, wherein when the electronic tag receives a read/write command from the reader/writer, the electronic tag updates the operation factor in its storage unit, including: When the electronic tag receives a read/write instruction from the reader/writer, the electronic tag reads the operation factor from the storage unit; The electronic tag updates the operation factor according to a second preset algorithm, and writes the updated operation factor into the storage unit. 5. The method according to claim 4, wherein the electronic tag updates the operation factor according to a second preset algorithm, including: The electronic tag adds or subtracts the operation factor to a preset value to obtain an updated operation factor; Alternatively, the electronic tag performs an XOR operation on the operation factor and the preset value to obtain an updated operation factor. 6. The method according to claim 2 or 3, wherein when the electronic tag receives the read/write instruction from the reader, before the electronic tag updates the operation factor in its storage unit, it further includes: The electronic tag encrypts the data in the storage unit according to the initial key to obtain the initial encrypted data. 7. The method according to claim 6, wherein, before encrypting the data in the storage unit according to the initial key to obtain the initial encrypted data, further comprising: The electronic tag is initialized to obtain the initial secret key. 8. An electronic tag, characterized in that it is used to implement the signal transmission method of the electronic tag according to any one of claims 1-7, the electronic tag comprising: an antenna, a storage unit and a logic unit; The logic unit is used to update the operation factor in the storage unit when the electronic tag receives a read/write command from the reader/writer through the antenna; The logic unit is also used to calculate the updated operation factor and the initial secret key according to the first preset algorithm to obtain the current secret key; The antenna is used to send the current encrypted data and the current secret key in the storage unit to the reader. 9. A signal transmission method of a radio frequency system, characterized in that the radio frequency system comprises the electronic tag, reader and server according to claim 8; The signal transmission method of the radio frequency system includes: The reader sends a read and write command; The electronic tag updates the operation factor in its storage unit; The electronic tag calculates the updated operation factor and the initial secret key according to the first preset algorithm to obtain the current secret key; The electronic tag sends the current encrypted data and the current secret key in the storage unit to the reader; The reader-writer sends the acquired current secret key and the current encrypted data to the server; The server decrypts the current encrypted data according to the initial key and the current key, or decrypts the current encrypted data according to the initial key. 10. A radio frequency system, characterized in that, the radio frequency system comprises the electronic tag, reader and server according to claim 8, for performing the signal transmission method of the radio frequency system according to claim 9; The electronic tag is connected in communication with the reader, and the reader is used to send read and write instructions to the electronic tag to obtain the current encrypted data and the current secret key in the electronic tag; The server is connected in communication with the reader, and the reader is further configured to send the obtained current secret key and the current encrypted data to the server; the server is configured to The secret key and the current secret key decrypt the current encrypted data, or decrypt the current encrypted data according to the initial secret key.

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