CN102945401B - Multi-parameter stride right shift incremental encrypted binary anti-counterfeiting printing method - Google Patents

Abstract

A multi-parameter stride right-shifting incremental encryption binary anti-counterfeiting printing method, which can pass binary anti-counterfeiting information through 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 method, and the anti-counterfeiting information can be identified from any fragment when identifying printed matter. It can be widely used in the anti-counterfeiting field of printed matter.

Description

Multi-parameter stride right shift incremental encryption binary anti-counterfeiting printing method

Technical field:

The invention relates to an anti-counterfeiting printing technology, in particular to a multi-parameter step-right shifting incrementally increasing encryption 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 coded data representing the authenticity of the product may be illegally copied and forged. 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, and the eight-bit binary encryption parameters are recorded as C ₁ , C ₂ , C ₃ , C ₄ , C ₅ , C ₆ , C ₇ , C ₈ , C ₉ , C ₁₀ , encryption parameters C ₁ , C _{2 , C 3} , C ₄ , C ₅ , C ₆ , C ₇ , C ₈ , _{C 9 ,} C ₁₀ is an integer from 0 to 255, and 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 an integer of 0≦k≦3, and 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 values of encryption parameters C ₁ , C ₂ , C ₃ , C ₄ , C ₅ , C ₆ , C ₇ , C ₈ , C ₉ , and C ₁₀ , because the encryption parameters C ₁ , C ₂ , C ₃ , and C _4. C ₅ , C ₆ , C ₇ , C ₈ , C ₉ , and C ₁₀ are integers from 0 to 255, and C ₁ , C ₂ , C ₃ , C ₄ , C ₅ , and C are any of the 256 numbers. ₆ , C ₇ , C ₈ , C ₉ , C ₁₀ ten different numbers have a total of 256! /(256-10)! A kind of method of getting, setting operator and the initial value k=0 of operation sequence control variable k, setting the position control variable i=1 of 16 binary information N _i in the binary anti-counterfeiting information table of 16 groups, from 16 groups The first group of 16-bit binary information in the binary anti-counterfeiting information table starts from N ₁ , and the first group of 16-bit binary information in the 16-bit group of binary anti-counterfeiting information table is Sequential encryption operation, and in the first group of 16-bit binary information Perform i+1 and k+1 operations at the same time as the variable-order encryption operation, so that the next operation points to Among them, both i and k are increased by 1, and a 16-bit binary encrypted anti-counterfeiting information table is generated by performing a variable-sequence encryption operation on each group of 16-bit binary information in the 16-bit binary anti-counterfeiting information table, and the shape of the AM dot There are two types: □ and ◇, where □ is defined as the number 0, and ◇ is defined as the number 1, and the generated 16-bit binary encrypted anti-counterfeiting information is used to modulate the AM network through the circular look-up table method, so that it can be regularly in accordance with the above The shapes of the two kinds of AM dots change the shape of the AM dots in the hybrid screening, so that the shape of the AM dots in the mixed screening changes regularly. After modulation, 16 adjacent AM dots form a group of 16-bit binary information, which makes it carry Anti-counterfeiting information, and embedding the anti-counterfeiting information in the entire page network, can more effectively combat illegal copying based on cameras, scanners, and electronic documents. By non-obviously embedding extractable anti-counterfeiting information in the printed matter, effective proof can be provided for the genuine product, and at the same time, it has strong anti-counterfeiting ability without adding additional anti-counterfeiting costs.

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 The FM dot image signal uses the generated 16-bit binary modulation signal to modulate the shape of the AM dot in the halftone mixed screen image signal by means of a circular look-up table modulation method, so that the shape of the AM dot changes according to □ and ◇ 16 adjacent AM dots in the halftone mixed screen image signal carry 16-bit binary anti-counterfeiting information through shape changes, thereby generating a halftone mixed screen image signal with anti-counterfeit information embedded in the entire page dots to realize anti-counterfeit 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 $h_i=N_i{}_K^1{C}_2{}_K^2{C}_3{}_K^3{C}_4{}_K^4{C}_5{}_K^5{C}_6{}_K^6{C}_7{}_K^7{C}_8{}_K^8{C}_9{}_K^9{C}_{10},$

When the operator control variable k=1 $h_i=N_i{}_K^1{N}_i{}_K^2{N}_i{}_K^3{C}_4{}_K^4{C}_5{}_K^5{C}_6{}_K^6{C}_7{}_K^7{C}_8{}_K^8{C}_9{}_K^9{C}_{10},$

When the operator control variable k=2 $h_i=N_i{}_K^1{N}_i{}_K^2{N}_i{}_K^3{N}_i{}_K^4{N}_i{}_K^5{C}_6{}_K^6{C}_7{}_K^7{C}_8{}_K^8{C}_9{}_K^9{C}_{10},$

When the operator control variable k=3 $h_i=N_i{}_K^1{N}_i{}_K^2{N}_i{}_K^3{N}_i{}_K^4{N}_i{}_K^5{N}_i{}_K^6{N}_i{}_K^7{C}_8{}_K^8{C}_9{}_K^9{C}_{10},$ 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, eight-bit binary encryption parameters are recorded as C ₁ , C ₂ , C ₃ , C ₄ , C ₅ , C ₆ , C ₇ , C ₈ , C ₉ , C ₁₀ , encryption parameters C ₁ , C ₂ , C ₃ , C ₄ , C ₅ , C ₆ , C ₇ , C ₈ , C ₉ , and C ₁₀ are integers from 0 to 255, the two-digit binary operator and the control variable of the operation order are denoted as k, and the operator and the operation order 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 values of encryption parameters C ₁ , C ₂ , C ₃ , C ₄ , C ₅ , C ₆ , C ₇ , C ₈ , C ₉ , and C ₁₀ , because the encryption parameters C ₁ , C ₂ , C ₃ , and C _4. C ₅ , C ₆ , C ₇ , C ₈ , C ₉ , and C ₁₀ are integers from 0 to 255, and C ₁ , C ₂ , C ₃ , C ₄ , C ₅ , and C are any of the 256 numbers. ₆ , C ₇ , C ₈ , C ₉ , C ₁₀ ten different numbers have a total of 256! /(256-10)! A kind of method of getting, setting operator and the initial value k=0 of operation sequence control variable k, setting the position control variable i=1 of 16 binary information N _i in the binary anti-counterfeiting information table of 16 groups, from 16 groups The first group of 16-bit binary information in the binary anti-counterfeiting information table starts from N ₁ , and the first group of 16-bit binary information in the 16-bit group of binary anti-counterfeiting information table is Sequential encryption operation, and in the first group of 16-bit binary information Perform i+1 and k+1 operations at the same time as the variable-order encryption operation, so that the next operation points to Among them, both i and k are increased by 1, and a 16-bit binary encrypted anti-counterfeiting information table is generated by performing a variable-sequence encryption operation on each group of 16-bit binary information in the 16-bit binary anti-counterfeiting information table, and the shape of the AM dot There are two types: □ and ◇, where □ is defined as the number 0 and ◇ is defined as the number 1. The generated 16-bit binary encrypted anti-counterfeiting information is channel-coded to generate a binary modulated signal with error detection and error correction functions. Channel coding can adopt various forms such as cyclic coding, convolutional coding or Turbo coding. The original continuous tone image signal is rasterized (RIP) and mixed and screened to output a halftone mixed screen image signal, including amplitude modulation dot and frequency modulation dot image signals. Utilize the generated binary modulation signal and use the circular look-up modulation method to modulate the shape of the AM dots in the halftone mixed screen image signal, so that the shape of the AM dots in the mixed screen can be changed regularly, and the halftone mixed screen embedded with anti-counterfeiting information can be generated. The network image signal, through the cyclic look-up table modulation method, makes the adjacent 16-bit AM dots generate a 16-bit binary data through the change of shape, so that it carries anti-counterfeiting information, and makes the anti-counterfeiting information embedded in the entire page dots, realizing anti-counterfeiting printing .

In the flow chart 2 of 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, demodulate the shape information of the AM dot, and output A binary modulation signal of 16 bits. 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 $h_i=N_i{}_K^1{C}_2{}_K^2{C}_3{}_K^3{C}_4{}_K^4{C}_5{}_K^5{C}_6{}_K^6{C}_7{}_K^7{C}_8{}_K^8{C}_9{}_K^9{C}_{10},$

When the operator control variable k=1 $h_i=N_i{}_K^1{N}_i{}_K^2{N}_i{}_K^3{C}_4{}_K^4{C}_5{}_K^5{C}_6{}_K^6{C}_7{}_K^7{C}_8{}_K^8{C}_9{}_K^9{C}_{10},$

When the operator control variable k=2 $h_i=N_i{}_K^1{N}_i{}_K^2{N}_i{}_K^3{N}_i{}_K^4{N}_i{}_K^5{C}_6{}_K^6{C}_7{}_K^7{C}_8{}_K^8{C}_9{}_K^9{C}_{10},$

When the operator control variable k=3 $h_i=N_i{}_K^1{N}_i{}_K^2{N}_i{}_K^3{N}_i{}_K^4{N}_i{}_K^5{N}_i{}_K^6{N}_i{}_K^7{C}_8{}_K^8{C}_9{}_K^9{C}_{10},$ 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 Perform H decryption operation on the 16-bit binary information to solve the binary anti-counterfeiting information N _i , 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, Recover the anti-counterfeiting signal and output the anti-counterfeiting information.

Claims (1)

1. anti-counterfeiting information is generated binary modulated signal by cryptographic calculation and chnnel coding by one kind, and anti-counterfeiting information is embedded in the Multi-parameter stride right shift increment encryption scale-of-two antiforging printing method in full page by modulation system of tabling look-up by circulating, it is characterized in that: digitizing is carried out to anti-counterfeiting information, generate the scale-of-two anti-counterfeiting information table of 8 group, anti-counterfeiting information is image information, Word message or trademark information, for preventing producing information spillover in ciphering process, in scale-of-two anti-counterfeiting information table 8 one group of binary message is expanded to 16 one group of binary messages, generate 16 the one group scale-of-two anti-counterfeiting information table that most-significant byte is 0 entirely, i-th group of 16 binary message in 16 one group scale-of-two anti-counterfeiting information table are denoted as N _i, i be greater than 0 positive integer, eight-digit binary number encryption parameter is denoted as C ₁, C ₂, C ₃, C ₄, C ₅, C ₆, C ₇, C ₈, C ₉, C ₁₀, encryption parameter C ₁, C ₂, C ₃, C ₄, C ₅, C ₆, C ₇, C ₈, C ₉, C ₁₀be the integer of 0 to 255, two binary operators and order of operation control variable are denoted as k, and operator and order of operation control variable k are the integer of 0≤k≤3, operator adopt+,-, ×, ÷ tetra-kinds of computings, when operator and order of operation control variable k=0 be defined as+, × ,-, ÷ ,+, ÷, × ,-, ÷ computing, when operator and order of operation control variable k=1 be defined as ÷ ,+,+, × ,-, ÷ ,+, ÷, × computing, when operator and order of operation control variable k=2 be defined as-, ÷ ,+, × ,+, ÷, × ,-, ÷ computing, when operator and order of operation control variable k=3 be defined as+, ÷ ,+, × ,-, ÷, × ,-, ÷ computing, become sequence cryptographic calculation when operator and order of operation control variable k=0 and be defined as become sequence cryptographic calculation when operator and order of operation control variable k=1 to be defined as become sequence cryptographic calculation when operator and order of operation control variable k=2 to be defined as become sequence cryptographic calculation when operator and order of operation control variable k=3 to be defined as setting encryption parameter C ₁, C ₂, C ₃, C ₄, C ₅, C ₆, C ₇, C ₈, C ₉, C ₁₀initial value, because of encryption parameter C ₁, C ₂, C ₃, C ₄, C ₅, C ₆, C ₇, C ₈, C ₉, C ₁₀be the integer in 0 to 255, appoint in 256 numbers and get C ₁, C ₂, C ₃, C ₄, C ₅, C ₆, C ₇, C ₈, C ₉, C ₁₀ten different numerals have 256! / (256-10)! plant and follow the example of, the initial value k=0 of setting operator and order of operation control variable k, sets 16 binary message N in 16 one group scale-of-two anti-counterfeiting information table _iposition control variable i=1, first group of 16 binary message N from 16 one group scale-of-two anti-counterfeiting information table ₁start, first group of 16 binary message in 16 one group scale-of-two anti-counterfeiting information table are carried out become sequence cryptographic calculation, and first group of 16 binary message is being carried out carry out i+1 and k+1 computing while becoming sequence cryptographic calculation, next computing is pointed to wherein i and k both increases 1, by carrying out change sequence cryptographic calculation to each group 16 binary messages in 16 one group scale-of-two anti-counterfeiting information table, generate the scale-of-two encryption anti-fake information table of 16 group, the shape of amplitude is set to two kinds: and ◇, wherein is defined as numeral 0, ◇ is defined as numeral 1, utilize the scale-of-two encryption anti-fake information of 16 group generated through chnnel coding, generate 16 one group of binary modulated signals with error detecting and error correcting function, image signal of original continuous being changed the line map exports shadow tone hybrid screening picture signal through rasterizing process (RIP) and hybrid screening, comprising amplitude and FM screened image signal, 16 the one group of binary modulated signals generated are utilized to adopt the shape of amplitude in circulation look-up table modulation system modulation shadow tone, the shape of amplitude is changed according to and ◇ is regular, adjacent 16 amplitudes in shadow tone hybrid screening picture signal are made to carry 16 scale-of-two encryption anti-fake information by the change of shape, thus be created on the shadow tone hybrid screening picture signal embedding anti-counterfeiting information in full page site, realize anti-counterfeit printing.