CN102945391B - Same-directional synchronous gradually-increased encryption binary anti-counterfeiting printing method - Google Patents

Abstract

A method for synchronously increasing encryption binary anti-counterfeiting printing in the same direction, the method can pass binary anti-counterfeiting information through Sequential encryption operations and channel coding generate binary modulation signals, and the anti-counterfeiting information is embedded in the entire page in the orderly change of the shape of the amplitude modulation dots through the modulation method of the circular look-up table method, and the anti-counterfeiting information can be identified from any fragment when identifying printed matter Information can be widely used in the field of anti-counterfeiting printed matter.

Description

Synchronous incremental encryption binary anti-counterfeiting printing method in the same direction

Technical field:

The invention relates to an anti-counterfeiting printing technology, in particular to a synchronously increasing binary anti-counterfeiting printing technology, which can be used for anti-counterfeiting of various printed products.

Background technique:

The existing relatively common anti-counterfeiting methods are as follows: The first is laser anti-counterfeiting marks, which use laser recessive ink fluorescent ink printing technology to print product logos or special identification patterns into product anti-counterfeiting labels. And the same type of product uses the same label, because the anti-counterfeiting label is easier to forge, and the fake anti-counterfeiting label is used on the counterfeit product, causing the product to be confused, so it is difficult to effectively prevent counterfeiting. The second is the password anti-counterfeiting label. The method adopted is to compile a set of numbers for each product, and the codes of each product are different. The numbers are printed on the labels and covered, and the numbers are stored Into the computer database that can be inquired by consumers. When consumers purchase products, they input the numbers on the logo into the computer database through telephone or networked computer for comparison and identification. The same is true, and the difference is false. The method is simple and easy to identify. It is not easy to forge, but in actual use, because the encoded data is uniformly generated by the computer, the label is printed. The code data representing the authenticity of the product may be illegally copied and falsified. At the same time, the code can also be recycled from the code on the product that has not been inquired to make a label and affixed to the fake product. The anti-counterfeiting effect is difficult to guarantee. The third is texture anti-counterfeiting, which uses the texture features on the label to prevent counterfeiting. Although it is difficult to forge, since only the serial number of the label is set, and it is a clear code, each label can be queried repeatedly, and counterfeiters can store it in the warehouse. The clerk or salesperson plagiarizes the serial number on the label and the necessary texture characteristics reflected in the query, that is, the presence or absence of phenomena in the grid, and then forges them in batches according to this characteristic. In summary, the existing anti-counterfeiting methods have certain shortcomings, and thus cannot fundamentally prevent counterfeit products.

Invention content:

In order to overcome the shortcomings of the existing anti-counterfeiting printing technology for various printed products, the present invention improves the existing technology in view of the shortcomings of the existing anti-counterfeiting printing technology for printed products, and proposes a binary encryption signal to modulate the shape of the AM dots of printed products Encrypted anti-counterfeiting printing technology, this anti-counterfeiting printing technology embeds anti-counterfeiting information in the entire page by changing the shape of AM dots, and can identify anti-counterfeiting information from any fragment when identifying printed matter, so it is highly resistant to shattering and can be read from Fundamentally put an end to the use of photography, scanning and other illegal copying.

The technical solution adopted by the present invention to solve the technical problem is: separately process the amplitude modulation dots and frequency modulation dots in the mixed screen of flexographic printing, and use image information, text information, trademark information and other anti-counterfeiting information to generate 8-bit binary Anti-counterfeiting information table, in order to prevent information overflow during the encryption process, the 8-bit binary information in the binary anti-counterfeiting information table is expanded to 16-bit binary information, and a 16-bit binary anti-counterfeiting information with all 0s in the upper 8 bits is generated Table, the i-th group of 16-bit binary information in the 16-bit binary anti-counterfeiting information table is recorded as N _i , i is a positive integer greater than 0, the eight-bit binary encryption parameter is recorded as C, and the encryption parameter C is 1≦C≦ The positive integer of 255, the two-digit binary operator and the control variable of the operation sequence are denoted as k, the operator and the control variable k of the operation sequence are integers of 0≦k≦3, the operator Four operations of +, -, ×, ÷ are used, and the operator and operation order control variable k=0 Defined as +, ×, -, ÷, +, ÷, ×, -, ÷ operations, operator and operation sequence control variable k=1 Defined as ÷, +, +, ×, -, ÷, +, ÷, × operations, operator and operation sequence control variable k=2 Defined as -, ÷, +, ×, +, ÷, ×, -, ÷ operations, operator and operation order control variable k=3 Defined as +, ÷, +, ×, -, ÷, ×, -, ÷ operations, operator and operation sequence control variable k = 0 time variable sequence encryption operation is defined as The operator and operation sequence control variable k=1 time-varying sequence encryption operation is defined as Operator and operation sequence control variable k=2 time-varying sequence encryption operation is defined as Operator and operation sequence control variable k=3 time-varying sequence encryption operation is defined as Set the initial value of encryption parameter C, set the initial value k=0 of operator and operation sequence control variable k, set the position control variable i=1 of 16 binary information N _i in the 16-bit binary anti-counterfeiting information table , starting from the first group of 16-bit binary information in the 16-bit group of binary anti-counterfeiting information table, carry out each group of 16-bit binary information in the 16-bit group of binary anti-counterfeiting information table Sequential encryption operations, and each set of 16-bit binary information Carry out i+1 and k+1 operations at the same time as the variable sequence encryption operation, and generate 16-bit binary encrypted anti-counterfeiting information by performing the above encryption operation on each group of 16-bit binary information in the 16-bit binary anti-counterfeiting information table There are two types of AM dot shapes: square □ and rhombus The square □ is defined as the number 0, rhombus Defined as the number 1, use the generated 16-bit binary encrypted anti-counterfeiting information to undergo channel coding to generate a 16-bit binary modulation signal with error detection and error correction functions, and rasterize the original continuous tone image signal ( RIP) and mixed screen output halftone mixed screen image signal, including amplitude modulation dot and frequency modulation dot image signal, using the generated 16-bit binary modulation signal to modulate the halftone mixed screen image signal by means of circular look-up table modulation The shape of AM dots, make the shape of AM dots according to square□ and rhombus Changes occur regularly, so that the adjacent 16 AM dots in the halftone mixed screen image signal carry 16-bit binary encrypted anti-counterfeiting information through shape changes, thereby generating a halftone mixed screen image with anti-counterfeiting information embedded in the entire page dots Signal, to achieve anti-counterfeiting printing.

In order to solve the above-mentioned technical problems, the anti-counterfeiting information is digitized at first, and a binary anti-counterfeiting information table of 8 bits is generated. The anti-counterfeiting information can be image information, text information, trademark information, etc. The binary information is expanded into a group of 16 binary information, and a 16-bit binary anti-counterfeiting information table with all 0s in the upper 8 bits is generated, and each group of 16-bit binary information in the 16-bit binary anti-counterfeiting information table is encrypted in sequence operation to generate a 16-bit binary encrypted anti-counterfeiting information table, and use the 16-bit binary information in the generated 16-bit binary encrypted anti-counterfeiting information table to undergo channel coding to generate a 16-bit group with error detection and error correction functions. Binary modulated signal. Channel coding can adopt various forms such as cyclic coding, convolutional coding or Turbo coding, etc., and the original continuous modulation image signal is rasterized (RIP) and mixed and screened to output a halftone mixed screened image signal, including amplitude modulation dots and Frequency modulation dot image signal, use the generated 16-bit binary modulation signal to modulate the shape of the AM dot in the half-tone mixed screen image signal, so that the shape of the AM dot follows the square and rhombus Changes occur regularly, so that the adjacent 16 AM dots in the halftone mixed screen image signal carry 16-bit binary anti-counterfeiting information through the change of shape, thereby generating a halftone mixed screen image signal with anti-counterfeiting information embedded in the entire page dot , to achieve anti-counterfeiting printing.

When extracting anti-counterfeiting information, first collect the network dot image signal, through the fuzzy recognition of the shape of the AM network dot, distinguish the shape of the AM network dot, extract the edge signal and shape information of the AM network dot, demodulate the shape information of the AM network dot, and output 16-bit one Set of binary modulated signals. Perform channel decoding on the 16-bit binary modulated signal output by demodulation, generate a 16-bit binary decryption anti-counterfeiting information table after channel decoding, record the 16-bit binary information in the binary decryption anti-counterfeiting information table as H _i , pass The encryption process shows that,

When the operator control variable k=0 $h_i=N_i{}_K^{1}C{}_K^{2}C{}_K^{3}C{}_K^{4}C{}_K^5{N}_i{}_K^{6}C{}_K^{7}C{}_K^{8}C{}_K^{9}C,$ When the operator control variable k=1 $h_i=N_i{}_K^1{N}_i{}_K^{2}C{}_K^{3}C{}_K^{4}C{}_K^5{N}_i{}_K^6{N}_i{}_K^{7}C{}_K^{8}C{}_K^{9}C,$ When the operator control variable k=2 $h_i=N_i{}_K^1{N}_i{}_K^2{N}_i{}_K^{3}C{}_K^{4}C{}_K^5{N}_i{}_K^6{N}_i{}_K^7{N}_i{}_K^{8}C{}_K^{9}C,$ When the operator control variable k=3 $h_i=N_i{}_K^1{N}_i{}_K^2{N}_i{}_K^3{N}_i{}_K^{4}C{}_K^5{N}_i{}_K^6{N}_i{}_K^7{N}_i{}_K^8{N}_i{}_K^{9}C,$ The initial value of the position control variable of 16 binary information H _i in the binary decryption anti-counterfeiting information table is set as i=1, starting from the first H ₁ in the binary decryption anti-counterfeiting information table, to each group in the binary decryption anti-counterfeiting information table The 16-bit binary information is decrypted, and the binary anti-counterfeiting information N _i is solved to generate a 16-bit binary anti-counterfeiting information table whose upper 8 bits are all 0, remove the upper 8 bits, and generate an 8-bit binary anti-counterfeiting information table, restore Anti-counterfeiting signal and output anti-counterfeiting information.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

Figure 1 is a flow chart of loading anti-counterfeiting information.

Figure 2 is a flow chart of extracting anti-counterfeiting information.

Detailed ways

In flow chart 1 of loading anti-counterfeiting information, the original anti-counterfeiting information (image, text, trademark) is digitized to generate an 8-bit binary anti-counterfeiting information table, and the 8-bit binary information in the binary anti-counterfeiting information table is expanded to 16 One set of binary information, generate a 16-bit binary anti-counterfeiting information table whose upper 8 bits are all 0, the i-th group of 16-bit binary information in the 16-bit binary anti-counterfeiting information table is recorded as N _i , i is greater than 0 Positive integer, the eight-digit binary encryption parameter is denoted as C, the encryption parameter C is a positive integer of 1≦C≦255, the two-digit binary operator and the operation order control variable are denoted as k, and the operator and operation order control variable k is 0≦ Integer of k≦3, operator Four operations of +, -, ×, ÷ are used, and the operator and operation order control variable k=0 Defined as +, ×, -, ÷, +, ÷, ×, -, ÷ operations, operator and operation sequence control variable k=1 Defined as ÷, +, +, ×, -, ÷, +, ÷, × operations, operator and operation sequence control variable k=2 Defined as -, ÷, +, ×, +, ÷, ×, -, ÷ operations, operator and operation order control variable k=3 Defined as +, ÷, +, ×, -, ÷, ×, -, ÷ operations, operator and operation sequence control variable k = 0 time variable sequence encryption operation is defined as The operator and operation sequence control variable k=1 time-varying sequence encryption operation is defined as Operator and operation sequence control variable k=2 time-varying sequence encryption operation is defined as Operator and operation sequence control variable k=3 time-varying sequence encryption operation is defined as Set the initial value of encryption parameter C, set the initial value k=0 of operator and operation sequence control variable k, set the position control variable i=1 of 16 binary information N _i in the 16-bit binary anti-counterfeiting information table , starting from the first group of 16-bit binary information in the 16-bit group of binary anti-counterfeiting information table, carry out each group of 16-bit binary information in the 16-bit group of binary anti-counterfeiting information table Sequential encryption operations, and each set of 16-bit binary information Carry out i+1 and k+1 operations at the same time as the variable sequence encryption operation, and generate 16-bit binary encrypted anti-counterfeiting information by performing the above encryption operation on each group of 16-bit binary information in the 16-bit binary anti-counterfeiting information table There are two types of AM dot shapes: square □ and rhombus The square □ is defined as the number 0, rhombus Defined as the number 1, use the generated 16-bit binary encrypted anti-counterfeiting information to undergo channel coding to generate a 16-bit binary modulation signal with error detection and error correction functions, and rasterize the original continuous tone image signal ( RIP) and mixed screen output halftone mixed screen image signal, including amplitude modulation dot and frequency modulation dot image signal, using the generated 16-bit binary modulation signal to modulate the halftone mixed screen image signal by means of circular look-up table modulation The shape of AM dots, make the shape of AM dots according to square□ and rhombus Changes occur regularly, so that the adjacent 16 AM dots in the halftone mixed screen image signal carry 16-bit binary encrypted anti-counterfeiting information through shape changes, thereby generating a halftone mixed screen image with anti-counterfeiting information embedded in the entire page dots Signal, to achieve anti-counterfeiting printing.

In the flow chart 2 of extracting anti-counterfeiting information, when extracting anti-counterfeiting information, first collect the dot image signal, through the fuzzy recognition of the shape of the AM dot, distinguish the shape of the AM dot, extract the edge signal and shape information of the AM dot, and demodulate the AM dot The shape information of the screen dots, output a 16-bit binary modulation signal. Perform channel decoding on the 16-bit binary modulated signal output by demodulation, generate a 16-bit binary decryption anti-counterfeiting information table after channel decoding, record the 16-bit binary information in the binary decryption anti-counterfeiting information table as H _i , pass The encryption process shows that,

When the operator control variable k=0 $h_i=N_i{}_K^{1}C{}_K^{2}C{}_K^{3}C{}_K^{4}C{}_K^5{N}_i{}_K^{6}C{}_K^{7}C{}_K^{8}C{}_K^{9}C,$ When the operator control variable k=1 $h_i=N_i{}_K^1{N}_i{}_K^{2}C{}_K^{3}C{}_K^{4}C{}_K^5{N}_i{}_K^6{N}_i{}_K^{7}C{}_K^{8}C{}_K^{9}C,$ When the operator control variable k=2 $h_i=N_i{}_K^1{N}_i{}_K^2{N}_i{}_K^{3}C{}_K^{4}C{}_K^5{N}_i{}_K^6{N}_i{}_K^7{N}_i{}_K^{8}C{}_K^{9}C,$ When the operator control variable k=3 $h_i=N_i{}_K^1{N}_i{}_K^2{N}_i{}_K^3{N}_i{}_K^{4}C{}_K^5{N}_i{}_K^6{N}_i{}_K^7{N}_i{}_K^8{N}_i{}_K^{9}C,$ The initial value of the position control variable of 16 binary information H _i in the binary decryption anti-counterfeiting information table is set as i=1, starting from the first H ₁ in the binary decryption anti-counterfeiting information table, to each group in the binary decryption anti-counterfeiting information table The 16-bit binary information is decrypted, and the binary anti-counterfeiting information N _i is solved to generate a 16-bit binary anti-counterfeiting information table whose upper 8 bits are all 0, remove the upper 8 bits, and generate an 8-bit binary anti-counterfeiting information table, restore Anti-counterfeiting signal and output anti-counterfeiting information.

Claims (1)

1. A binary modulation signal is generated by anti-counterfeiting information through encryption operation and channel coding, and the anti-counterfeiting information is embedded in the whole page through the circular look-up modulation mode. The synchronous increasing encryption binary anti-counterfeiting printing method is characterized in that: anti-counterfeiting The information is digitized to generate an 8-bit binary anti-counterfeiting information table. The anti-counterfeiting information is image information, text information or trademark information. In order to prevent information overflow during the encryption process, the 8-bit binary information in the binary anti-counterfeiting information table is expanded. For a group of 16 binary information, generate a 16-bit binary anti-counterfeiting information table whose upper 8 bits are all 0, and record the i-th group of 16-bit binary information in the 16-bit binary anti-counterfeiting information table as N _i , where i is A positive integer greater than 0, the eight-bit binary encryption parameter is denoted as C, the encryption parameter C is a positive integer of 1≦C≦255, the two-digit binary operator and the operation sequence control variable are denoted as k, the operator and the operation sequence control variable k is an integer of 0≦k≦3, the operator Four operations of +, -, ×, ÷ are used, and the operator and operation order control variable k=0 Defined as +, ×, -, ÷, +, ÷, ×, -, ÷ operations, operator and operation sequence control variable k=1 Defined as ÷, +, +, ×, -, ÷, +, ÷, × operations, operator and operation sequence control variable k=2 Defined as -, ÷, +, ×, +, ÷, ×, -, ÷ operations, operator and operation order control variable k=3 Defined as +, ÷, +, ×, -, ÷, ×, -, ÷ operations, operator and operation sequence control variable k = 0 time variable sequence encryption operation is defined as The operator and operation sequence control variable k=1 time-varying sequence encryption operation is defined as Operator and operation sequence control variable k=2 time-varying sequence encryption operation is defined as Operator and operation sequence control variable k=3 time-varying sequence encryption operation is defined as Set the initial value of encryption parameter C, set the initial value k=0 of operator and operation sequence control variable k, set the position control variable i=1 of 16 binary information N _i in the 16-bit binary anti-counterfeiting information table , starting from the first group of 16-bit binary information in the 16-bit group of binary anti-counterfeiting information table, carry out each group of 16-bit binary information in the 16-bit group of binary anti-counterfeiting information table Sequential encryption operations, and each set of 16-bit binary information Carry out i+1 and k+1 operations at the same time as the variable sequence encryption operation, and generate 16-bit binary encrypted anti-counterfeiting information by performing the above encryption operation on each group of 16-bit binary information in the 16-bit binary anti-counterfeiting information table Table, the shape of AM dots is set to two types: square and rhombus where the square Defined as the number 0, rhombus Defined as the number 1, use the generated 16-bit binary encrypted anti-counterfeiting information to undergo channel coding to generate a 16-bit binary modulation signal with error detection and error correction functions, and rasterize the original continuous tone image signal ( RIP) and mixed screen output halftone mixed screen image signal, including amplitude modulation dot and frequency modulation dot image signal, using the generated 16-bit binary modulation signal to modulate the halftone mixed screen image signal by means of circular look-up table modulation In the shape of the AM dots, make the shape of the AM dots follow the square and rhombus Changes occur regularly, so that the adjacent 16 AM dots in the halftone mixed screen image signal carry 16-bit binary encrypted anti-counterfeiting information through shape changes, thereby generating a halftone mixed screen image with anti-counterfeiting information embedded in the entire page dots Signal, to achieve anti-counterfeiting printing.