CN1971589B - System and method for anti-counterfeiting of passive radio frequency tag - Google Patents

Abstract

A passive radio frequency label anti-counterfeiting system and method, the system includes anti-counterfeiting module of the label, through the user interface, the product owner adopts the common code way of international to change the true EPC code of the product into the false EPC code and dispose the false EPC code on the label, and produce the key value of the password through the function of Hash, and send out the order of locking and lock the false EPC code on the label by the reader according to the cipher value produced; during verification, the reader reads the pseudo EPC code on the label and displays the read pseudo EPC code on the back-end processing device; then, an unlocking command is sent out through a reader, anti-counterfeiting verification of the tag is carried out according to the generated key value, if the tag is true, the fake EPC code can be decoded into a true EPC code according to the coding mode adopted by a product owner, and therefore the true EPC code enters a back-end processing device to carry out information retrieval on related products; the built-in security access mechanism increases the difficulty of mass copying of the tags and obviously improves the security of tag information.

Description

System and method for anti-counterfeiting of passive radio frequency tags

technical field

The invention relates to a system and method for anti-counterfeiting of passive radio frequency tags, belonging to the field of electric digital data processing.

Background technique

The Electronic Product Code (EPC) system is vigorously promoting the use of radio frequency identification (RFID) tags. EPC tags are widely used in clothing products, especially in outerwear and clothing items, such as embedding RFID chips in the manufacturing process of boutiques (such as leather bags, clothing, etc.), and jewelry, jewelry and other high unit price, small volume products can also be handled in the same way .

RFID is a non-contact automatic identification technology, which automatically identifies the target object and obtains relevant data through radio frequency signals, and the identification work does not require manual intervention. As a wireless version of the barcode, RFID technology has the advantages of waterproof, antimagnetic, high temperature resistance, long service life, large reading distance, encrypted data on the label, larger storage data capacity, and free change of stored information, etc. that barcodes do not have. The application will bring revolutionary changes to industries such as retail and logistics. If RFID technology can be closely linked to the electronic supply chain, it is likely to replace bar code scanning technology within a few years.

The entire RFID system is roughly composed of a tag (Tag), a reader (Reader) and a backend processing device (Backend System). RFID technology is to embed a Tag with a chip into the product, and the chip will automatically send the serial number of the product to the Reader. and other information. "Tags" containing radio frequency information are attached to items and can be scanned by readers (Readers) during storage, unloading, and delivery of goods. The scanned results will be immediately input to the backend processing device (Backend System), and all links in the supply chain can easily query relevant information. The RFID system combines technologies such as database management systems, computer networks, and firewalls to provide fully automatic security Convenient real-time monitoring system functions.

However, the security of embedded systems is gradually becoming an urgent issue, especially because RFID tags are not difficult to make, and as their cost declines, they are easy to be forged. Authoritative assessments show that forgery has increased by 10% in global trade, In 2004, $5 trillion was spent on counterfeiting in trade. Counterfeiting is a headache all over the world. The anti-counterfeiting methods currently used are: authorized authentication, or hidden password.

For example, U.S. Patent US622661 belongs to the implicit password method, which locks the serial code in the label memory in an implicit manner, and sets the visible serial label printed by physical means in another place. The label reader includes a decoding module. When the label reader scans, it compares the locked implicit serial code decoding with the visible serial label printed by physical means to identify the authenticity of the item, and after the identification is completed, the serial number in the label becomes invalid, thus Effectively avoid the problem of counterfeiting of expensive and high-end disposable consumables such as wine due to repeated use of packaging. But it is not suitable to use its method for non-consumable goods such as high-quality goods (such as leather bags, clothing accessories, etc.).

In addition, there is another authorized authentication method, such as U.S. Patent US6802447, which belongs to the authorized authentication method. RFID encodes EPC with a random binary ID, and then bit-shifts the EPC through its own algorithm to generate a pseudo-EPC code. The solution performs bit shift encryption and anti-counterfeiting on the basis of random binary ID encoding. However, the defect of this method is that it is easy to be decrypted. The cracker only needs to analyze the pseudo-EPC code of the label of a certain batch of products to determine the algorithm of its encoding and decoding. It may take a few minutes, or it may be several months or longer. The coding law of the true EPC code is just easy to draw, and counterfeiters just can imitate products in large quantities according to the coding law, and attach the fake copy label, thereby making the owner of the product suffer losses.

Therefore, authenticity identification of labels is a very important anti-counterfeiting technology in the RFID authorization authentication method, and there is no function of supporting label identification in the current standard.

Contents of the invention

In view of the deficiencies in the prior art above, the object of the present invention is to propose a system and method for anti-counterfeiting of passive radio frequency tags, that is, to solve the primary concern of product owners from a commercial point of view, that is, to find a A tag data protection scheme that can significantly improve security (increase the difficulty of mass copying and cloning of tags) is used to deal with tag security and avoid tag duplication.

In order to achieve the above object, the present invention provides a passive radio frequency tag anti-counterfeiting system, which includes: a passive radio frequency tag, which stores label information, and the passive radio frequency tag contains an Built-in antenna; reader, used to read or/and write tag information, the reader contains a reader antenna for transmitting the tag information between the passive radio frequency tag and the reader; back-end processing device, which communicates with The reader is connected for data exchange; the back-end processing device also includes an anti-counterfeiting module of the label, which is used to convert the true EPC code of the product into a pseudo-EPC code and pass the hash function Generate a password key value, and make the label pass the password key value generated by the Hash function for anti-counterfeiting verification; on the basis of this label verification, perform the decoding operation of the pseudo-EPC code and the true EPC code; the label's The anti-counterfeiting module includes: a preparation module, which is used to convert the true EPC code into a pseudo-EPC code by adopting an internationally accepted codec method, and store the pseudo-EPC code as label information in the passive radio frequency tag by the reader, and pass The hash function generates a password key value, and the reader issues a lock command to lock the pseudo-EPC code on the label according to the generated password value; The password value locked by the pseudo-EPC code on the label is decrypted to verify the authenticity of the label. On the basis of the label verification, the pseudo-EPC code and the true EPC code are decoded.

According to the anti-counterfeiting system of the passive radio frequency tag, the anti-counterfeiting module of the tag also includes: a reading module, which is used to order the reader to read the pseudo-EPC code on the tag, and display the read EPC code on the back-end processing device. Pseudo-EPC code; reset module, used to clear the screen display of the back-end processing device, and prepare for a new test.

According to the passive radio frequency tag anti-counterfeiting system, the hash function is a matrix one-way iterative function, and the matrix itself is a shared key value.

According to the passive radio frequency tag anti-counterfeiting system, the encoding method is regularly replaced.

According to the passive radio frequency tag anti-counterfeiting system, the reader antenna can simultaneously support four sets of built-in antennas included in the tag.

According to the passive radio frequency tag anti-counterfeit system, the number of bits of the true EPC code is the same as that of the pseudo EPC code.

According to the anti-counterfeiting system of the passive radio frequency tag, the passive radio frequency tag also includes an anti-password calculation module, which is used for if the specified number of verifications is unsuccessful, the passive radio frequency tag will Does not respond to reader commands.

According to the passive radio frequency tag anti-counterfeiting system, the system can only be used after authorization.

The present invention also includes a passive radio frequency tag anti-counterfeiting method, and the passive radio frequency tag anti-counterfeiting system configured by the method includes a passive radio frequency tag stored with tag information, a reader, a reader antenna, and a back-end processing device , wherein the reader and the passive radio frequency tag use the reader antenna to transmit the tag information through radio frequency; the back-end processing device is connected to the reader for data exchange; the back-end processing device also includes an anti-counterfeiting module of the tag , and selectively execute the function suggested by the output display device of the back-end processing device through the user interface, the method for anti-counterfeiting of the passive radio frequency tag includes the following steps:

Step 1: Convert the real EPC code of the product into a pseudo-EPC code and configure the pseudo-EPC code on the label with an internationally accepted encoding method, and generate a password key value through the hash function, and send it out to the reader based on the generated password value The lock command locks the pseudo-EPC code on the label;

Step 2: order the reader to read the pseudo-EPC code on the label, and display the read pseudo-EPC code on the back-end processing device;

Step 3: Issue an unlock command through the reader, perform decryption operations based on the generated key value and the password value locked by the pseudo-EPC code on the label, verify the authenticity of the label, and display the verification result by the back-end processing device, If the label is true, generate an entry code for successful verification, and perform step 4; if the label is false, perform step 5;

Step 4: Convert the pseudo-EPC code into a real EPC code according to the encoding method adopted by the product owner from the successfully verified entry code, and then enter the back-end processing device according to the real EPC code for information retrieval of related products;

Step 5: Clear the display screen of the back-end processing unit and prepare for a new test.

According to the method for anti-counterfeiting of the passive radio frequency tag, if the label is false in the step 3, it also includes that if the specified number of verifications is unsuccessful, the passive radio frequency tag will not be used within a certain period of time. Steps to respond to reader commands.

According to the passive radio frequency tag anti-counterfeiting method, a product owner's identity authentication step is also included between the steps 1 and 2.

According to the passive radio frequency tag anti-counterfeiting method, the hash function is a matrix one-way iterative function, and the matrix itself is a shared key value.

According to the passive radio frequency tag anti-counterfeiting system, the encoding method can be replaced regularly.

According to the passive radio frequency tag anti-counterfeit system, the number of bits of the true EPC code is the same as that of the pseudo EPC code.

From the above technical solutions, we can see that the authorized reader, the back-end processing module and the authorized computer system or the POS terminal of the point of sale are connected. The product owner owns all authorized devices, and only allows users authorized by the product owner to access through valid ID cards and passwords; the product owner first converts the EPC code into a pseudo-EPC code, and the pseudo-EPC code may appear Like random codes, unauthorized people cannot convert it into real EPC codes in a short period of time. This encoding method is used to hide the purpose of real EPC codes; these authorized devices can convert fake EPC codes into real EPC codes. EPC code, and retrieve related product information in the database by entering the code. The real EPC code does not have to be displayed on the POS terminal. Even if the reader held by the attacker is effective, it only reads the pseudo-EPC codes on the tags, and does not decode them in a short time, and can only copy these pseudo-EPC tags; the present invention further conceives of tag identification The authenticity scheme proposes a tag authentication using the one-way hash lock function of the hash function. With the cryptographic key value, we can verify whether this tag is duplicated or not.

The entire system of the present invention adopts a friendly interface access mode and has a built-in security access mechanism. The EPC code of the current first-generation, category-1 label is 64 bits. This scheme is also applicable to the EPC code of the label with 64, 96, 128 bits, and the longer the number of bits of the EPC code of the label, The higher the security. Therefore, the difficulty of mass duplication and cloning of labels is increased, and the data security of labels is significantly improved; in addition, the present invention can protect the true EPC data on labels without changing the standards of RFID readers and labels.

For a better understanding of the objects and other features of the present invention, preferred embodiments thereof will be described in more detail with reference to the accompanying drawings.

Description of drawings

Fig. 1 is the system schematic diagram of passive radio frequency tag anti-counterfeiting of the present invention;

Fig. 2 is the flow chart of the method for passive radio frequency tag anti-counterfeiting of the present invention;

Fig. 3 is a schematic structural diagram of the passive radio frequency tag anti-counterfeiting module of the present invention;

Fig. 4 is the workflow schematic diagram of whole passive radio frequency label identification of the present invention;

Fig. 5 is a schematic diagram of the process of the encoding and decoding scheme adopting general linear shift (Jigsaw) in the present invention;

Fig. 6 is the authentication protocol of the passive radio frequency tag of the present invention;

Fig. 7 is a screen display diagram of the execution result of the reading option in the menu of the embodiment of the present invention;

Fig. 8 is a screen display diagram of the prompt result of the counterfeit label obtained after the execution of the verification menu option in the embodiment of the present invention;

Fig. 9 is a screen display of the prompt result of the true label obtained after the execution of the verification menu option in the embodiment of the present invention.

Detailed ways

Please refer to Fig. 1 and Fig. 2, Fig. 1 is the system schematic diagram of passive radio frequency tag anti-counterfeiting of the present invention; Fig. 2 is the flowchart of the method for passive radio frequency tag anti-counterfeiting of the present invention; Radio wave signals are used to transmit data for non-contact data identification and access, which can achieve the function of identity and item content identification.

As can be seen from Fig. 1, in the present embodiment, the passive radio frequency tag anti-counterfeiting system comprises: the item to be tested (such as a handbag), which is placed about one foot away from it before the RFID antenna; UHF tags (Generation 1, Category 1) and tag information are attached to the item to be tested (for example, a handbag). Passive RF tags contain a built-in antenna for communication with the RF reader antenna; the reader It is ALR-9780 type 902-928MHz UHF reader, which is used to read or/and write tag information; the RFID antenna is a 4-port linear or loop antenna with a gain value of 6dBi, in which passive radio frequency tags and read The tag information is transmitted between the readers. The reader can support up to four sets of tag antennas, and the communication between the reader antenna and the tag is through radio waves (radio frequency); the operating temperature is 0°C to+50°C; the size is 11.98 (height) × 9.00 (width) × 1.72 (depth) inches; weight 4 pounds; power supply is 12V, 2A DC; the back-end processing device is a POS terminal, which can be a notebook or a personal computer, and the POS terminal is connected through a concave 9-pin RS232 The communication interface such as COM1 is connected with the reader for data exchange; the POS terminal includes a back-end processing module, and its application program is developed under the standard version of the Java platform and runs under the Microsoft XP operating system.

Please refer to Fig. 2, Fig. 2 is the flow chart of the method for anti-counterfeiting of passive radio frequency tags of the present invention; The EPC code is converted into a pseudo-EPC code and a shared key value generated through the hash function, and the shared key value generated by the tag through the hash function is subjected to anti-counterfeiting verification. The anti-counterfeiting module of the label selectively executes the main menu prompted by the output display device of the POS terminal through the user interface, and the method for anti-counterfeiting of the passive radio frequency label includes the following steps:

Step 1: The product owner converts the product's true EPC code into a pseudo-EPC code using an internationally accepted encoding method and configures the pseudo-EPC code on the label, and generates a shared key value through the hash function, and the reader sends an encryption key The lock command locks the pseudo-EPC code on the label according to the generated shared key value;

Step 2: order the reader to read the pseudo-EPC code on the label, and display the read pseudo-EPC code on the POS terminal;

Step 3: Issue an unlock command through the reader, and perform anti-counterfeiting verification on the tag through the shared key value generated by the Hash function, verify the authenticity of the tag, and display the verification result by the POS terminal, if the tag is true , to generate an entry code for successful verification, go to step 4, if the label is false, go to step 5;

Step 4: Convert the pseudo-EPC code into a real EPC code according to the encoding method adopted by the product owner from the successfully verified entry code, and then enter the back-end processing device according to the real EPC code for information retrieval of related products;

Step 5: Clear the display screen of the POS terminal, return to the main menu, and prepare for a new test.

Please refer to Figure 3, the main menu of the anti-counterfeiting module of the label includes: a preparation module, which is used to convert the true EPC code into a pseudo-EPC code using an internationally accepted codec method, and use the pseudo-EPC code as the label information through the reader Stored in the passive radio frequency tag; and the shared key value generated by the pseudo EPC code through the Hash function, and the reader issues a lock command to lock the pseudo EPC code on the tag according to the generated shared key value; The reading module is used to order the reader to read the pseudo-EPC code on the label, and display the read pseudo-EPC code on the POS terminal; the verification module is used to make the label pass the shared key value generated by the Hash function. Decryption operation to verify the authenticity of the label, based on the label verification, then decode the fake EPC code and the true EPC code; reset the module to clear the screen display of the POS terminal and prepare for a new test.

The product owner owns all authorized devices, and only allows users authorized by the product owner to enter through valid ID cards and passwords.

The length of the anti-counterfeiting module in the present embodiment is 64 bits for the EPC code, and this module can also be designed to work for 96, 128, N bits or even more bits for the EPC code. The user only needs to single Click the drop-down menu to select the software version with the corresponding number of bits.

Please refer to Fig. 4, Fig. 4 is the workflow schematic diagram of the entire passive radio frequency tag identification of the present invention; The workflow of the authorized user A to the RFID tag in the figure is specifically please refer to Fig. 5, the workflow of the authorized user A to the RFID tag That is, step 1 specifically includes the following steps:

Step 11: The product owner converts the true EPC code into a pseudo-EPC code through an internationally accepted codec method, and stores the pseudo-EPC code as label information in the passive radio frequency tag through the reader;

Step 12: the shared key value generated by the hash function;

Step 13: The reader issues a lock command to lock the pseudo-EPC code on the tag and store it in the passive radio frequency tag according to the generated shared key value.

The pseudo-EPC code converted from the EPC code in the above step 11 looks like a random code, and unauthorized people cannot convert it into a real EPC code in a short period of time, thereby achieving the purpose of hiding the real EPC code.

Assuming that the EPC code is a hexadecimal number with a length of n bits, in fact n bits can be a code of any length. For example, the current EPC code of the first-generation, category-1 tag is 64 bits long. This scheme is suitable for codes with 64, 96, 128 and other bit lengths.

Please refer to Fig. 5, Fig. 5 is the schematic diagram of the encoding and decoding scheme process that adopts general linear shift (Jigsaw) of the present invention; The present embodiment adopts a kind of matrix one-way iterative function namely random matrix hashing algorithm to generate key value, utilizes M * N The binary random matrix itself acts as the key. Specifically, the general linear shift (Jigsaw) codec scheme is used to encode the 64-bit true EPC code, and the 64-bit true EPC code is divided into an 8×8 matrix, and the EPC code is distributed in the M×N matrix In , the pseudo-EPC code obtained in this way has the same number of bits as the real EPC code. Likewise, a 96-bit EPC code can use a 12×8 matrix.

In the random matrix hashing algorithm adopted above, the matrix itself is used as a key, that is, the key value=reduce (hash (pseudo-EPC). The reader issues a lock (LOCK) command, and according to the generated shared key value, the Pseudo-EPC code is locked in the passive RF tag, the key value actually becomes the password on the tag. As the EPC tag in the 1st generation, category 1, it is only 8 bits long, no matter what we use For the key value, the counterfeiter's cracking probability is 1/2 ⁸ , which is 1/256. In the second-generation type 1 tag, the length of the password is 32 bits, and it will be more difficult for the counterfeiter to crack the tag password .

Moreover, this embodiment also has the function of preventing password derivation. When a counterfeiter tries to input an incorrect password for many times, the EPC tag can resist the input of deduced password by temporarily losing its ability. If multiple attempts are made to enter an incorrect password, the tag will become invalid for 1 hour. When it is in the disabled state, the tag will not respond to the reader's command.

The product owner configures the pseudo-EPC code on the label of the item before circulation. Counterfeiters even use the same RFID reader, only to duplicate these fake EPC tags. And we propose a label identification scheme with one-way hybrid lock function. Through tag identification, we can verify whether the tag is a duplicate. This encoding scheme does not change the standards of RFID readers and tags.

Please refer to Fig. 4, for the decoding process of the pseudo-EPC code, since the real product owner knows the distribution method of the matrix, it is easy to return the pseudo-EPC code to the original EPC code. There are many methods (such as the method of linear shift) to distribute the original EPC bit string in the matrix. Without this method of distribution, an attacker cannot decode, at least for a short time. Besides this, the actual product owner can change the distribution method after a certain period. These authorized devices are able to convert pseudo-EPC codes into real EPC codes and retrieve relevant product information in the database by entering the codes. The real EPC code does not have to be displayed on the POS terminal.

We check if the authentication was successful by using the "Unlock" command. Please refer to Fig. 6, Fig. 6 is the identification protocol of the passive radio frequency tag of the present invention; "Tag->Reader" in the figure indicates the reverse data flow from A to B, and "Reader" is the authorized one connected with the reader The operation process of the terminal.

There are N tags in the system, let an integer i (1≤i≤N) denote an EPC tag. Let Ti be the EPC identifier corresponding to tag i (a unique RFID-readable hex string). Let Pi be the k-bit key value corresponding to label i. Issue the unlock "Unlock" command through the reader to perform anti-counterfeiting verification on the tag's shared key value generated by the Hash function, that is, use the Unlock(P) command to indicate the execution of the "Unlock" command by the key P, and then Use the Hash function to calculate the password to unlock the lock. When the EPC tag replies with A="ack", the "Unlock" command is successfully completed; otherwise, a failure indication is returned directly.

Please refer to Fig. 7, Fig. 8 and Fig. 9, Fig. 7 is a screen display diagram of the execution result of the reading option in the menu of the embodiment of the present invention; Fig. 8 is the prompt result of the counterfeit label obtained after the execution of the verification menu option in the embodiment of the present invention Screen display diagram; FIG. 9 is a screen display diagram of the prompt result of obtaining the true label after the execution of the verification menu option in the embodiment of the present invention.

Place the 2 items to be tested in front of the RFID antenna about a foot away from it, assuming that 2 handbags have embedded RFID tags. Then press the Read button to test and display the read pseudo-EPC code on the POS terminal, as shown in the menu in Figure 7. At this time, the test result is the value of two pseudo-EPC codes.

Place an item to be tested about one foot away from the RFID antenna, then press the Verify button to test and the verification result will be displayed by the POS terminal; if it is a true tag, the test result is shown in Figure 8, if it is false label, the test results are shown in Figure 9. If the label is true, the user can use the successfully verified entry code to convert the pseudo-EPC code into a real EPC code according to the encoding method of the shared key value, and then enter the information retrieval of related products in the back-end processing device according to the real EPC code .

After the above operations are completed, you can press the Reset button to clear the display screen of the POS terminal, return to the main menu, and prepare for a new test.

The above are only preferred embodiments of the present invention, and are not intended to limit the implementation scope of the present invention; that is, all equivalent changes and modifications made according to the patent scope of the present invention are covered by the patent scope of the present invention.

Claims (14)

1. A system for anti-counterfeiting of passive radio frequency tags, comprising: Passive radio frequency tags, which store tag information, the passive radio frequency tags contain built-in antennas for communication with radio frequency antennas; a reader for reading and/or writing tag information, the reader having a reader antenna for transmitting the tag information between the passive radio frequency tag and the reader; A back-end processing device, which is connected to the reader for data exchange; It is characterized in that the described back-end processing device also includes an anti-counterfeiting module of the label, which includes: The preparation module is used to convert the true EPC code into a pseudo-EPC code using an internationally accepted encoding and decoding method, and the reader stores the pseudo-EPC code as tag information in the passive radio frequency tag, and generates a cryptographic code through the Hash function. Key value, and according to the generated password value, the reader issues a lock command to lock the pseudo-EPC code on the label; The verification module, which sends an unlock command from the reader, performs decryption operations based on the generated key value and the password value locked by the pseudo-EPC code on the label, and verifies the authenticity of the label. On the basis of this label verification, further The pseudo-EPC code and the real EPC code are decoded. 2. the anti-counterfeiting system of passive radio frequency tags according to claim 1, is characterized in that, the anti-counterfeiting module of described label also comprises: The reading module is used to order the reader to read the pseudo-EPC code on the label, and display the read pseudo-EPC code on the back-end processing device; The reset module is used to clear the screen display of the back-end processing device and prepare for a new test. 3. The passive radio frequency tag anti-counterfeiting system according to claim 1 or 2, wherein the hash function is a matrix one-way iterative function, and the matrix itself is a shared key value. 4. The passive radio frequency tag anti-counterfeit system according to claim 1 or 2, characterized in that, the codec method is replaced regularly. 5. The passive radio frequency tag anti-counterfeiting system according to claim 1, wherein the reader antenna can simultaneously support four groups of built-in antennas included in the tag. 6. The passive radio frequency tag anti-counterfeiting system according to claim 1 or 2, wherein the number of bits of the true EPC code is the same as that of the pseudo EPC code. 7. The anti-counterfeiting system of passive radio frequency tags according to claim 1 or 2, is characterized in that, described passive radio frequency tags also includes preventing password derivation module, is used for if the number of times of specifying verification is unsuccessful, The passive radio frequency tag will not respond to the reader's command within a certain period of time. 8. The passive radio frequency tag anti-counterfeit system according to claim 1, characterized in that the passive radio frequency tag anti-counterfeit system can only be used after authorization. 9. A method for anti-counterfeiting of passive radio frequency tags, realizing the anti-counterfeiting system of passive radio frequency tags configured by the method includes passive radio frequency tags stored with tag information, a reader and a back-end processing device, wherein the reader and The passive radio frequency tags use the reader antenna to transmit the tag information through radio frequency; the back-end processing device is connected to the reader for data exchange; the back-end processing device also includes an anti-counterfeiting module of the tag, which can Selectively perform the function suggested by the output display device of the back-end processing device; it is characterized in that the method for anti-counterfeiting of the passive radio frequency tag comprises the following steps: Step 1: Convert the real EPC code of the product into a pseudo EPC code and configure the pseudo EPC code on the label using an internationally accepted encoding method, and use the hash function to generate a password key value, and send it out from the reader based on the generated password value The lock command locks the pseudo-EPC code on the label; Step 2: order the reader to read the pseudo-EPC code on the label, and display the read pseudo-EPC code on the back-end processing device; Step 3: Issue an unlock command through the reader, and perform a decryption operation based on the generated key value by the reader to issue the unlock command and the password value locked by the pseudo-EPC code on the label to verify the authenticity of the label, and the back-end The processing device displays the verification result. If the label is true, generate an entry code for successful verification, and perform step 4, and if the label is false, perform step 5; Step 4: From the successfully verified entry code, convert the pseudo-EPC code into a real EPC code according to the encoding method adopted by the product owner, and then enter the back-end processing device for information retrieval of related products according to the real EPC code; Step 5: Clear the display screen of the back-end processing unit and prepare for a new test. 10. The method for anti-counterfeiting of passive radio frequency tags according to claim 9, characterized in that, in the step 3, if the label is false, the step also includes that if the specified number of verifications is unsuccessful, the passive radio frequency The tag will not respond to the step of the reader command for a certain period of time. 11. The method for anti-counterfeiting of passive radio frequency tags according to claim 9, characterized in that, between said step 1 and step 2, an identity authentication step of the product owner is also included. the 12. The method for anti-counterfeiting of passive radio frequency tags according to claim 9, wherein said Hash function is a matrix one-way iterative function, and the matrix itself is a shared key value. 13. The passive radio frequency tag anti-counterfeit system according to claim 9, characterized in that, the encoding method is replaced regularly. 14. The passive radio frequency tag anti-counterfeiting system according to claim 9, characterized in that the number of bits of the true EPC code is the same as that of the pseudo EPC code. the

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