CN102945403B - Binary anti-counterfeit printing method based on transposition order-change - Google Patents

Abstract

A transposition and sequence encryption binary anti-counterfeiting printing method, the method can encrypt binary anti-counterfeiting information through transposition and sequence encryption and channel coding to generate a binary modulation signal, and embed the anti-counterfeiting information 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, which can identify the anti-counterfeiting information from any fragment when identifying printed matter, and can be widely used It is used in the field of printed matter anti-counterfeiting.

Description

Binary anti-counterfeiting printing method with transposition and sequence encryption

Technical field:

The invention relates to an anti-counterfeit printing technology, in particular to a binary anti-counterfeit printing technology with transposition and sequence encryption. The anti-counterfeiting printing technology 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 binary control variable is recorded as k, and the control variable k is 0≦k≦3 Integer, eight-digit binary encryption parameters are recorded as C ₀ , C ₁ , C ₂ , C ₃ , eight-digit binary encryption parameter variables are recorded as C ₁ , C ₁₊₁ , C ₁₊₂ , C ₁₊₃ , and encryption parameters C ₀ , ^C ₁ , C ₂ , ^and C ₃ are integers from ₀ to 256 _{, operators} ^{1 1} _, ^. ₁ ,. ² ₁ , ³ ₁ , ⁴ ₁ are defined as "+" operations, when the control variable k= ^{1, 1} ₁ ,. ² ₁ , ³ ₁ , ⁴ ₁ are defined as "-" operations, when the control variable k=2, ¹ ₁ ,. ² ₁ , ³ ₁ , ⁴ ₁ are defined as "×" operation, when the control variable k=3, ¹ ₁ ,. ² ₁ , ³ ₁ , ⁴ ₁ are defined as "÷" operation, when the control variable k=0, C ₁ = C ₀ +1, C ₁₊₁ = C ₁ +1, C ₁₊₂ = C ₂ +1, C ₁₊₃ = C ₃ +1, when the control variable k=1, C ₁ =C ₁ +2 , C ₁₊₁ ＝C ₂ +2, C ₁₊₂ ＝C ₃₊₂ , C ₁₊₃ ＝C ₀ +2, when the control variable k=2, C ₁ ＝C 1 +2, C _{1 +1} ＝ C ₂ +2, C ₁₊₂ = C ₃ +2, C ₁₊₃ = C ₀ +2, when the control variable k = 3, C ₁ = C ₃ +4, C ₁₊₁ = C ₀ +4, C ₁₊₂ =C ₁ +4, C ₁₊₂ =C ₃ +4, set the initial value of encryption parameters C ₀ , C ₁ , C ₂ and C ₃ , set the initial value k=0 of control variable k, Set the position control variable i=1 of 16 binary information N _i in a group of binary anti-counterfeiting information tables of 16 bits, start from the first 16 binary information _N1 in the anti-counterfeiting information tables of a group of binary binary of 16, to 16-bit one N _i ¹ ₁ C ₁ ^{2 1} _{C 1+1} ³ ₁ C ₁₊₂ ⁴ ₁ C ₁₊₃ transposition encryption operation is performed on each 16-bit binary information in the group binary anti-counterfeiting information table, and each 16-bit binary information for N _i ¹ ₁ C ₁ ² ₁ C ₁₊₁ ³ ₁ C ₁₊₂ ⁴ ₁ C ₁₊₃ Perform i+1 and k+1 operations at the same time as transposition and sequence encryption operations, so that the next operation points to N _i ¹ ₁ C _{1 2} ¹ C _{1 +1} ³ ₁ C _{1 +2} ⁴ ₁ C ₁₊₃ (in which both i and k are increased by 1), by performing N _i ¹ ₁ C ₁ ² ₁ C ₁₊₁ on each 16-bit binary information in the 16-bit binary anti-counterfeiting information table ³ ₁ C ₁₊₂ ⁴ ₁ C ₁₊₃ transposition and sequence encryption operation to generate a 16-bit binary encrypted anti-counterfeiting information table, the shape of the AM dots is set to two types: □ and ◇, where □ is defined as the number 0 , ◇ is defined as the number 1, using the generated 16-bit binary encrypted anti-counterfeiting information to modulate the AM dots through the circular look-up table method, so that it can change the shape of the AM dots in the hybrid screen regularly according to the shapes of the above two AM dots , so that the shape of the AM dots in the mixed screen is changed regularly. After modulation, 16 adjacent AM dots form a set of 16-bit binary information, so that it carries anti-counterfeiting information and embeds the anti-counterfeiting information in the entire page dots. It can more effectively fight against 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 to 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 16-bit binary information in the 16-bit binary anti-counterfeiting information table is transposed and sequenced Encryption operation N _i ¹ ₁ C ₁ ² ₁ C ₁₊₁ ³ ₁ C ₁₊₂ ⁴ ₁ C ₁₊₃ to generate a 16-bit binary encrypted anti-counterfeiting information table, and use the generated 16-bit binary encrypted anti-counterfeiting information The 16-bit binary information in the table is channel coded to generate a 16-bit binary modulation signal with error detection and error correction functions. 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 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 ◇ regularly, so that The 16 adjacent AM dots in the mixed screened image signal carry 16-bit binary anti-counterfeiting information through shape changes, thereby generating a mixed screened image signal with anti-counterfeiting information embedded in the entire page dots, realizing 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 H _i =N _i ¹ ₁ C ₁ ² ₁ C ₁₊₁ ³ ₁ C ₁₊₂ ⁴ ₁ C ₁₊₃ , the initial value of the position control variable of the 16-bit binary information H _i in the binary decryption anti-counterfeiting information table is set As i=1, starting from the first bit H ₁ in the binary decryption anti-counterfeiting information table, perform H _i =N ^{i 1} ₁ C ₁ ² ₁ C ₁₊₁ for each 16-bit binary information in the binary decryption anti-counterfeiting information table ³ ₁ C ₁₊₂ ⁴ ₁ C ₁₊₃ decryption operation, 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 group The binary anti-counterfeit information table, restore the anti-counterfeit signal and output the anti-counterfeit 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 binary control variable is denoted as k, the control variable k is an integer of 0≦k≦3, the eight-digit binary encryption parameters are denoted as C ₀ , C ₁ , C ₂ , C ₃ , and the eight-digit binary encryption parameter variables are denoted as C _1. C ₁₊₁ , C ₁₊₂ , C ₁₊₃ , encryption parameters C ₀ , C ₁ , C ₂ , and C ₃ are integers from 0 to 256, operators ¹ ₁ , ^.2 ₁ , ³ ₁ , ⁴ ₁ adopts four ^{kinds of} + _{, -} ^, × _, ÷, when _the control variable k= ⁰ , ¹ _{1 ,} ^. , ³ ₁ , ⁴ ₁ are defined as "-" operations, when control variable k=2 ^{, 1} ₁ ,. ² ₁ , ³ ₁ , ⁴ ₁ are defined as "×" operations, when control variable k=3, ¹ _{1 ,} ^. , ³ ₁ , ⁴ ₁ are defined as "÷" operation, when control variable k=0, C ₁ ＝C ₀ +1, C ₁₊₁ ＝C ₁ +1, C ₁₊₂ ＝C ₂ +1, C _{1+ 3} = C ₃ +1, when the control variable k = 1, C ₁ =C ₁ +2, C ₁₊₁ =C 2 +2, C ₁ + ₂ =C ₃ +2, C ₁₊₃ =C ₀ +2 , when control variable k=2, C ₁ ＝C ₁ +2, C ₁₊₁ ＝C ₂ +2, C ₁₊₂ ＝C ₃ +2, C ₁₊₃ ＝C ₀ +2, control variable k＝3 When C ₁ =C ₃ +4, C ₁₊₁ =C ₀ +4, C= ₁₊₂ =C ₁ +4, C ₁₊₂ =C ₃ +4, set encryption parameters C ₀ , C ₁ , The initial value of C ₂ and C ₃ , the initial value k=0 of setting control variable k, the position control variable i=1 of 16 binary information N _i in setting 16 groups of binary anti-counterfeit information table, from 16 one Starting with the first 16-bit binary information N ₁ in the group binary anti-counterfeiting information table, perform N _i ¹ ₁ C ₁ ² ₁ C ₁₊₁ ³ ₁ C for each 16-bit binary information in the 16-bit group binary anti-counterfeiting information table ₁₊₂ ⁴ ₁ C ₁₊₃ transposition and sequence encryption operation, and N _i ¹ ₁ C ₁ ^{2 1} _{C 1+1 3 1} C ₁₊₂ ^{4 1} _{C 1+3} for each 16 _- bit binary information Perform i+1 and k+1 operations at the same time as transposition and sequence encryption operations, so that the next operation refers to To N _i ¹ ₁ C ₁ ² ₁ C ₁₊₁ ³ ₁ C ₁₊₂ ⁴ ₁ C ₁₊₃ (wherein i and k all increase by 1), through each of the 16-bit binary anti-counterfeiting information table Perform N _i ¹ ₁ C ₁ ² ₁ C ₁₊₁ ³ ₁ C ₁₊₂ ⁴ ₁ C ₁₊₃ transposition and sequence encryption operations on 16-bit binary information to generate a 16-bit binary encrypted anti-counterfeiting information table, amplitude modulation outlets There are two types of shapes: □ 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 encoded to generate a binary modulation 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. Using the generated binary modulation signal, the shape of the AM dots in the hybrid screened image signal is modulated by the circular look-up table modulation method, so that the shape of the AM dots in the hybrid screened is changed regularly, and a hybrid screened image signal embedded with anti-counterfeiting information is generated. Through the circular look-up table modulation method, the adjacent 16-bit AM dots can generate a 16-bit binary data through shape changes, so that they can carry anti-counterfeiting information, and the anti-counterfeiting information can be embedded in the entire page dots to realize 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 H _i =N _i ¹ ₁ C ₁ ² ₁ C ₁₊₁ ³ ₁ C ₁₊₂ ⁴ ₁ C ₁₊₃ , the initial value of the position control variable of the 16-bit binary information H _i in the binary decryption anti-counterfeiting information table is set As i=1, starting from the first bit H ₁ in the binary decryption anti-counterfeiting information table, perform H _i =N _i ¹ ₁ C ₁ ² ₁ C ₁₊₁ for each 16-bit binary information in the binary decryption anti-counterfeiting information table ³ ₁ C ₁₊₂ ⁴ ₁ C ₁₊₃ decryption operation, 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 group The binary anti-counterfeit information table, restore the anti-counterfeit signal and output the anti-counterfeit information.

Claims (1)

1. anti-counterfeiting information is generated binary modulated signal by cryptographic calculation and chnnel coding by one kind, and the modulation system transposition be embedded in by anti-counterfeiting information in full page of tabling look-up by circulating becomes sequence encrypted binary antiforging printing method, 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, scale-of-two control variable is denoted as k, and control variable k is the integer of 0≤k≤3, and eight-digit binary number encryption parameter is denoted as C ₀, C ₁, C ₂, C ₃, eight-digit binary number encryption parameter variable is denoted as C _k, C _k+1, C _k+2, C _k+3, encryption parameter C ₀, C ₁, C ₂, C ₃be the integer in 0 to 256, operator@ ¹ _k. ² _k,@ ³ _k,@ ⁴ _kadopt+,-, ×, ÷ tetra-kinds ,@during control variable k=0 ¹ _k. ² _k,@ ³ _k,@ ⁴ _kbe defined as "+" computing ,@during control variable k=1 ¹ _k. ² _k,@ ³ _k,@ ⁴ _kbe defined as "-" computing ,@during control variable k=2 ¹ _k. ² _k,@ ³ _k,@ ⁴ _kbe defined as "×" computing ,@during control variable k=3 ¹ _k. ² _k,@ ³ _k,@ ⁴ _kbe defined as " ÷ " computing, C during control variable k=0 _k=C ₀+ 1, C _k+1=C ₁+ 1, C _k+2=C ₂+ 1, C _k+3=C ₃+ 1, C during control variable k=1 _k=C ₁+ 2, C _k+1=C ₂+ 2, C _k+2=C ₃+ 2, C _k+3=C ₀+ 2, C during control variable k=2 _k=C ₁+ 2, C _k+1=C ₂+ 2, C _k+2=C ₃+ 2, C _k+3=C ₀+ 2, C during control variable k=3 _k=C ₃+ 4, C _k+1=C ₀+ 4, C _k+2=C ₁+ 4, C _k+2=C ₃+ 4, setting encryption parameter C ₀, C ₁, C ₂and C ₃initial value, the initial value k=0 of setup 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 16 binary message N from 16 one group scale-of-two anti-counterfeiting information table ₁start, N is carried out to each 16 binary message in 16 one group scale-of-two anti-counterfeiting information table ₁@ ¹ _kc _k@ ² _kc _k+1@ ³ _kc _k+2@ ⁴ _kc _k+3transposition becomes sequence cryptographic calculation, and is carrying out N to each 16 binary message ₁@ ¹ _kc _k@ ² _kc _k+1@ ³ _kc _k+2@ ⁴ _kc _k+3transposition carries out i+1 and k+1 computing while becoming sequence cryptographic calculation, makes next computing point to N ₁@ ¹ _kc _k@ ² _kc _k+1@ ³ _kc _k+2@ ⁴ _kc _k+3(wherein i and k both increases 1), by carrying out N to each 16 binary message in 16 one group scale-of-two anti-counterfeiting information table ₁@ ¹ _kc _k@ ² _kc _k+1@ ³ _kc _k+2@ ⁴ _kc _k+3transposition becomes sequence cryptographic calculation, and generate the scale-of-two encryption anti-fake information table of 16 group, the shape of amplitude is set to two kinds: with wherein be defined as numeral 0, be 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, utilize 16 the one group of binary modulated signals generated to adopt the shape of amplitude in circulation look-up table modulation systems modulation hybrid screening picture signals, make the shape of amplitude according to with regularly to change, adjacent 16 amplitudes in 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 hybrid screening picture signal embedding anti-counterfeiting information in full page site, realize anti-counterfeit printing.