CN102945410A - Multi-parameter variable-sequence three-dimensional encrypted binary anti-counterfeiting printing method - Google Patents

Multi-parameter variable-sequence three-dimensional encrypted binary anti-counterfeiting printing method Download PDF

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CN102945410A
CN102945410A CN2012104018772A CN201210401877A CN102945410A CN 102945410 A CN102945410 A CN 102945410A CN 2012104018772 A CN2012104018772 A CN 2012104018772A CN 201210401877 A CN201210401877 A CN 201210401877A CN 102945410 A CN102945410 A CN 102945410A
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binary
group
counterfeiting information
operator control
control variables
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CN102945410B (en
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张立君
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Guangdong Tianlong Printing Co.,Ltd.
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Beijing Institute of Graphic Communication
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Abstract

The invention relates to a multi-parameter variable-sequence three-dimensional encrypted binary anti-counterfeiting printing method which comprises the following steps: generating binary anti-counterfeiting information into a binary modulation signal through [+++] encryption algorithm and channel coding and embedding the anti-counterfeiting information into a whole page through the orderly change of the shape of an amplitude modulation dot in a circular table look-up method modulation manner. When printed matters are identified, the anti-counterfeiting information can be identified from any one fragment; and the multi-parameter variable-sequence three-dimensional encrypted binary anti-counterfeiting printing method can be widely applied to the field of anti-counterfeiting of printed matters.

Description

Multiparameter becomes the three-dimensional scale-of-two antiforging printing method of encrypting of order
affiliated technical field:
The present invention relates to a kind of anti-counterfeiting printing technology, particularly a kind of multiparameter becomes the three-dimensional scale-of-two anti-counterfeiting printing technology of encrypting of order, and what this anti-counterfeiting printing technology can be for various printed matters is false proof.
background technology:
Existing comparatively common method for anti-counterfeit has following several: the first is laser anti-false sign, the symbol of product or special identification icon are printed to the anti-fake label of product by the recessive printing ink daylight fluorescence ink of laser printing technology, and the same class product is used the same labeling, because anti-fake label is easier to forge, and the anti-fake label of forging is used on fake products, cause the true and false of product to obscure, therefore be difficult to effectively false proof.The second is the cipher counterfeit-proof labeling, its method adopted is that every product is compiled one group of number, the coding of every product is not identical, this number is printed on labeling and hides, this number is deposited in the Computer Database that can inquire about for the consumer simultaneously, when the consumer buys product, number on sign is compared to identification by phone or networking computer input Computer Database, identical being very, difference is vacation, method is simple, identification easily, be difficult for forging, but in actual the use, because coded data is the rear labeling of printing of the unified generation of computing machine.The true and false coded data of representative products may be faked by illegal copies, and simultaneously, the coding on the product of the also recyclable not inquiry of encoding is made mark and is attached on the false pain product, and antifalse effect is difficult to guarantee.The third is texture anti-fake, false proof with the textural characteristics on its labeling, although more difficult forgery, but due to a serial number of bidding subsides, and be plain code, every piece of labeling can be inquired about repeatedly, in the necessary textural characteristics grid that the fake producer can be by warehouseman or shop-assistant be reflected during by the sequence number on labeling and inquiry have or not phenomenon to plagiarize after by this feature, forge in batches.In sum, all there is certain shortcoming in existing method for anti-counterfeit, thereby can not be from prevent fake products at all.
summary of the invention:
The shortcoming existed in order to overcome existing various printed matter anti-counterfeiting printing technology, the deficiency that the present invention is directed to existing printed matter anti-counterfeiting printing technology existence is improved prior art, a kind of encryption counterfeit printing technology of shape of scale-of-two coded signal modulation printed matter amplitude has been proposed, this anti-counterfeiting printing technology is embedded in anti-counterfeiting information in full page by the change of the shape of amplitude, can when identifying, printed matter identify anti-counterfeiting information from any one fragment, therefore there is very strong crush resistance, can fundamentally stop to adopt and take a picture, scanning waits the bootlegging behavior.
The technical solution adopted for the present invention to solve the technical problems is: the amplitude in the flexographic printing hybrid screening and frequency-modulation halftone dot are separately processed, utilize image information, Word message, the anti-counterfeiting information such as trademark information generate the binary system anti-counterfeiting information table of 8 group, for preventing from ciphering process producing information spillover, 8 one group of binary messages in binary system anti-counterfeiting information table are expanded to 16 one group of binary messages, the generation most-significant byte is 0 16 one group binary system anti-counterfeiting information table entirely, 16 binary messages of i in 16 one group binary system anti-counterfeiting information table group are denoted as to N i, i is greater than 0 positive integer, and the eight-digit binary number encryption parameter is denoted as
Figure 255444DEST_PATH_IMAGE001
, encryption parameter
Figure 987907DEST_PATH_IMAGE001
be the positive integer in 0 to 256, two binary operator control variables are denoted as k, the positive integer that operator control variables k is 0<=k<=3, operator
Figure 59025DEST_PATH_IMAGE002
adopt+,-, *, tetra-kinds of operators of ÷, during operator control variables k=0
Figure 710586DEST_PATH_IMAGE002
be defined as respectively+, * ,+, ÷ ,-, * ,-, ÷ ,+,-, during operator control variables k=1
Figure 631269DEST_PATH_IMAGE002
be defined as respectively-, * ,+, ÷ ,+, * ,-, ÷ ,+,-, during operator control variables k=2
Figure 400379DEST_PATH_IMAGE002
be defined as respectively-, ÷ ,+, ÷ ,-, * ,+, * ,+,-, during operator control variables k=3
Figure 824539DEST_PATH_IMAGE002
be defined as respectively+,-,+, ÷ ,-, * ,-, ÷ ,+, *, during operator control variables k=0 cryptographic calculation be defined as [ +
Figure 556445DEST_PATH_IMAGE004
+
Figure 365132DEST_PATH_IMAGE005
+
Figure 34011DEST_PATH_IMAGE006
], during operator control variables k=1 cryptographic calculation be defined as [
Figure 666855DEST_PATH_IMAGE007
+
Figure 155605DEST_PATH_IMAGE008
+
Figure 33562DEST_PATH_IMAGE005
+ ], during operator control variables k=2 cryptographic calculation be defined as [
Figure 74606DEST_PATH_IMAGE007
+
Figure 191598DEST_PATH_IMAGE004
+
Figure 732301DEST_PATH_IMAGE009
+ (
Figure 484094DEST_PATH_IMAGE006
], during operator control variables k=3 cryptographic calculation be defined as [
Figure 84839DEST_PATH_IMAGE007
+
Figure 423548DEST_PATH_IMAGE004
+
Figure 144773DEST_PATH_IMAGE005
+
Figure 642750DEST_PATH_IMAGE010
], set encryption parameter initial value, because of encryption parameter be the positive integer in 0 to 256, in 256 numbers, appoint and get
Figure 496809DEST_PATH_IMAGE001
the total 256! of ten different numerals / (256-10)! plant and follow the example of, set the initial value k=0 of operator control variables k, set 16 binary message N in 16 one group binary system anti-counterfeiting information table iPosition Control variable i=1, first 16 binary message N from 16 one group binary system anti-counterfeiting information table 1start, to each 16 binary message in 16 one group binary system anti-counterfeiting information table carry out [
Figure 849292DEST_PATH_IMAGE003
+
Figure 401628DEST_PATH_IMAGE004
+
Figure 839562DEST_PATH_IMAGE005
+
Figure 902590DEST_PATH_IMAGE006
] cryptographic calculation, and each 16 binary message is carried out [
Figure 984946DEST_PATH_IMAGE003
+ +
Figure 397528DEST_PATH_IMAGE005
+
Figure 621836DEST_PATH_IMAGE006
] carry out i+1 and k+1 computing when cryptographic calculation, make next computing point to [
Figure 824278DEST_PATH_IMAGE007
+ +
Figure 632407DEST_PATH_IMAGE005
+
Figure 535773DEST_PATH_IMAGE006
] wherein i and k all increased by 1, by each 16 binary message in 16 one group binary system anti-counterfeiting information table carry out [
Figure 717355DEST_PATH_IMAGE003
+ +
Figure 446332DEST_PATH_IMAGE005
+
Figure 887808DEST_PATH_IMAGE006
] cryptographic calculation, generating the binary add tight defense fake information table of 16 group, the shape of amplitude is set to two kinds: with
Figure 926882DEST_PATH_IMAGE012
, wherein
Figure 48422DEST_PATH_IMAGE011
be defined as the numeral 0,
Figure 293589DEST_PATH_IMAGE012
be defined as numeral 1, utilize the binary add tight defense fake information of 16 group generated by circulation look-up table modulation amplitude, make the shape of amplitude in its regular hybrid screening of the alteration of form according to above-mentioned two kinds of amplitudes, make in hybrid screening that the shape of amplitude is well-regulated to change, after modulation, adjacent 16 amplitudes form one group of 16 binary message, make it carry anti-counterfeiting information, and this anti-counterfeiting information is embedded in the full page site, can more effectively resist based on bootlegging behaviors such as camera, scanner, electronic documents.Obvious embed extractible anti-counterfeiting information by non-in printed matter, can provide valid certificates for genuine piece, there is stronger anti-forgery ability simultaneously, and do not increase extra false proof cost.
For solving above-mentioned technical matters, at first anti-counterfeiting information is carried out to digitizing, generate the scale-of-two anti-counterfeiting information table of 8 group, anti-counterfeiting information can be image information, Word message, trademark information etc., 8 one group of binary messages in scale-of-two anti-counterfeiting information table are expanded to 16 one group of binary messages, the generation most-significant byte is 0 16 one group scale-of-two anti-counterfeiting information table entirely, and each 16 binary message in 16 one group scale-of-two anti-counterfeiting information table are carried out
[
Figure 823666DEST_PATH_IMAGE003
+
Figure 620720DEST_PATH_IMAGE004
+
Figure 104922DEST_PATH_IMAGE005
+
Figure 12836DEST_PATH_IMAGE006
] cryptographic calculation, generate the binary add tight defense fake information table of 16 group, utilize 16 binary messages process chnnel codings in 16 the one group binary add tight defense fake information table generated, generate the binary modulated signal of 16 group with error detecting and error correcting function.Chnnel coding can adopt the various ways such as loop coding, convolutional encoding or Turbo coding, original continuous is changed the line map, and image signal is processed (RIP) through rasterizing and hybrid screening is exported shadow tone hybrid screening picture signal, comprising amplitude and FM screened image signal, 16 one group of binary modulated signals that utilize to generate adopt the shapes of amplitude in circulation look-up table modulation system modulation hybrid screening picture signals, the shape that makes amplitude according to
Figure 400348DEST_PATH_IMAGE011
with
Figure 368304DEST_PATH_IMAGE012
regular changing, make adjacent 16 amplitudes in the hybrid screening picture signal carry 16 scale-of-two anti-counterfeiting information by the change of shape, thereby be created on the hybrid screening picture signal that embeds anti-counterfeiting information in the full page site, realizes anti-counterfeit printing.
When extracting anti-counterfeiting information, at first gather the halftone dot image signal, through the fuzzy diagnosis of the shape to amplitude, differentiate the shape of amplitude, extract edge signal and the shape information of amplitude, the shape information of demodulation amplitude, export the binary modulated signal of 16 group.The binary modulated signal of 16 one group to demodulation output carries out channel-decoding, generates the scale-of-two deciphering anti-counterfeiting information table of 16 group after channel-decoding, and 16 binary messages that scale-of-two is deciphered in the anti-counterfeiting information table are denoted as H i, it is known by ciphering process,
H during operator control variable k=0 i=[
Figure 339802DEST_PATH_IMAGE003
+
Figure 425308DEST_PATH_IMAGE004
+
Figure 556075DEST_PATH_IMAGE005
+
Figure 570298DEST_PATH_IMAGE006
],
H during operator control variable k=1 i=[
Figure 888147DEST_PATH_IMAGE007
+
Figure 780273DEST_PATH_IMAGE008
+
Figure 765547DEST_PATH_IMAGE005
+
Figure 950671DEST_PATH_IMAGE006
],
H during operator control variable k=2 i=[
Figure 129718DEST_PATH_IMAGE007
+
Figure 183124DEST_PATH_IMAGE004
+
Figure 898271DEST_PATH_IMAGE009
+ (
Figure 378930DEST_PATH_IMAGE006
],
H during operator control variable k=3 i=[
Figure 313782DEST_PATH_IMAGE007
+
Figure 905300DEST_PATH_IMAGE004
+
Figure 740532DEST_PATH_IMAGE005
+
Figure 765995DEST_PATH_IMAGE010
], 16 binary message H in scale-of-two deciphering anti-counterfeiting information table iposition control variable initial value design be i=1, first H from scale-of-two deciphering anti-counterfeiting information table 1start, each 16 binary message in scale-of-two deciphering anti-counterfeiting information table are carried out to H i=[ + + +
Figure 853411DEST_PATH_IMAGE006
] decrypt operation, solve scale-of-two anti-counterfeiting information N i, the generation most-significant byte is 0 16 one group scale-of-two anti-counterfeiting information table entirely, removes most-significant byte, generates the scale-of-two anti-counterfeiting information table of 8 group, recovers anti-counterfeiting signal and also exports anti-counterfeiting information.
The accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further described.
Fig. 1 loads the anti-counterfeiting information process flow diagram, and encryption flow figure as shown in Figure 1.
Fig. 2 extracts the anti-counterfeiting information process flow diagram, and the demodulation process flow diagram as shown in Figure 2.
embodiment
In loading anti-counterfeiting information flow chart 1, original anti-counterfeiting information (image, word, trade mark) is through digitized processing, generate the binary system anti-counterfeiting information table of 8 group, 8 one group of binary messages in binary system anti-counterfeiting information table are expanded to 16 one group of binary messages, generate most-significant byte and be entirely 0 16 one group binary system anti-counterfeiting information table, 16 binary messages of i group in 16 one group binary system anti-counterfeiting information table are denoted as N i, i is greater than 0 positive integer, and the eight-digit binary number encryption parameter is denoted as
Figure 120444DEST_PATH_IMAGE001
, encryption parameter
Figure 194710DEST_PATH_IMAGE001
Be the positive integer in 0 to 256, two binary operator control variables are denoted as k, the positive integer that operator control variables k is 0<=k<=3, operator
Figure 863589DEST_PATH_IMAGE002
Adopt+,-, *, tetra-kinds of operators of ÷, during operator control variables k=0
Figure 230854DEST_PATH_IMAGE002
Be defined as respectively+, * ,+, ÷ ,-, * ,-, ÷ ,+,-, during operator control variables k=1
Figure 860550DEST_PATH_IMAGE002
Be defined as respectively-, * ,+, ÷ ,+, * ,-, ÷ ,+,-, during operator control variables k=2
Figure 863141DEST_PATH_IMAGE002
Be defined as respectively-, ÷ ,+, ÷ ,-, * ,+, * ,+,-, during operator control variables k=3
Figure 763357DEST_PATH_IMAGE002
Be defined as respectively+,-,+, ÷ ,-, * ,-, ÷ ,+, *, during operator control variables k=0 cryptographic calculation be defined as [
Figure 927622DEST_PATH_IMAGE003
+
Figure 44614DEST_PATH_IMAGE004
+
Figure 585317DEST_PATH_IMAGE005
+
Figure 337110DEST_PATH_IMAGE006
], during operator control variables k=1 cryptographic calculation be defined as [
Figure 813222DEST_PATH_IMAGE007
+
Figure 276564DEST_PATH_IMAGE008
+ +
Figure 230187DEST_PATH_IMAGE006
], during operator control variables k=2 cryptographic calculation be defined as [
Figure 877200DEST_PATH_IMAGE007
+
Figure 827838DEST_PATH_IMAGE004
+
Figure 84245DEST_PATH_IMAGE009
+ (
Figure 312095DEST_PATH_IMAGE006
], during operator control variables k=3 cryptographic calculation be defined as [
Figure 254644DEST_PATH_IMAGE007
+
Figure 69409DEST_PATH_IMAGE004
+
Figure 755605DEST_PATH_IMAGE005
+
Figure 837962DEST_PATH_IMAGE010
], set encryption parameter
Figure 951412DEST_PATH_IMAGE001
Initial value, because of encryption parameter
Figure 250544DEST_PATH_IMAGE001
Be the positive integer in 0 to 256, in 256 numbers, appoint and get
Figure 350218DEST_PATH_IMAGE001
The total 256! of ten different numerals / (256-10)! Plant and follow the example of, set the initial value k=0 of operator control variables k, set 16 binary message N in 16 one group binary system anti-counterfeiting information table iPosition Control variable i=1, first 16 binary message N from 16 one group binary system anti-counterfeiting information table 1Start, to each 16 binary message in 16 one group binary system anti-counterfeiting information table carry out [
Figure 677294DEST_PATH_IMAGE003
+
Figure 72897DEST_PATH_IMAGE004
+
Figure 485423DEST_PATH_IMAGE005
+
Figure 388788DEST_PATH_IMAGE006
] cryptographic calculation, and each 16 binary message is carried out [
Figure 570371DEST_PATH_IMAGE003
+
Figure 399525DEST_PATH_IMAGE004
+
Figure 33768DEST_PATH_IMAGE005
+ ] carry out i+1 and k+1 computing when cryptographic calculation, make next computing point to [
Figure 153744DEST_PATH_IMAGE007
+
Figure 779898DEST_PATH_IMAGE008
+ +
Figure 146605DEST_PATH_IMAGE006
] wherein i and k all increased by 1, by each 16 binary message in 16 one group binary system anti-counterfeiting information table carry out [
Figure 676681DEST_PATH_IMAGE003
+
Figure 349102DEST_PATH_IMAGE004
+
Figure 957938DEST_PATH_IMAGE005
+
Figure 242682DEST_PATH_IMAGE006
] cryptographic calculation, generating the binary add tight defense fake information table of 16 group, the shape of amplitude is set to two kinds:
Figure 253364DEST_PATH_IMAGE011
With
Figure 96686DEST_PATH_IMAGE012
, wherein Be defined as the numeral 0,
Figure 278323DEST_PATH_IMAGE012
Be defined as numeral 1,16 binary add tight defense fake informations of generation, through chnnel coding, generate the binary modulated signal with error detecting and error correcting function.Chnnel coding can adopt the various ways such as loop coding, convolutional encoding or Turbo coding.Original continuous is changed the line map, and image signal is processed (RIP) through rasterizing and hybrid screening is exported shadow tone hybrid screening picture signal, comprising amplitude and FM screened image signal.Utilize the binary modulated signal generated to adopt the modulation system of tabling look-up that circulates, the shape of amplitude in modulation hybrid screening picture signal, make in hybrid screening that the shape of amplitude is regular to change, generate the hybrid screening picture signal that embeds anti-counterfeiting information, by the circulation modulation system of tabling look-up, make adjacent 16 amplitudes generate 16 bit binary data by the change of shape, make it carry anti-counterfeiting information, and this anti-counterfeiting information is embedded in the full page site, realize anti-counterfeit printing.
In extracting anti-counterfeiting information process flow diagram 2, when extracting anti-counterfeiting information, at first gather the halftone dot image signal, fuzzy diagnosis through the shape to amplitude, differentiate the shape of amplitude, extract edge signal and the shape information of amplitude, the shape information of demodulation amplitude, export the binary modulated signal of 16 group.The binary modulated signal of 16 one group to demodulation output carries out channel-decoding, generates the scale-of-two deciphering anti-counterfeiting information table of 16 group after channel-decoding, and 16 binary messages that scale-of-two is deciphered in the anti-counterfeiting information table are denoted as H i, it is known by ciphering process,
H during operator control variable k=0 i=[
Figure 143511DEST_PATH_IMAGE003
+
Figure 157735DEST_PATH_IMAGE004
+
Figure 117994DEST_PATH_IMAGE005
+
Figure 633289DEST_PATH_IMAGE006
],
H during operator control variable k=1 i=[
Figure 228349DEST_PATH_IMAGE007
+
Figure 538108DEST_PATH_IMAGE008
+ +
Figure 36140DEST_PATH_IMAGE006
],
H during operator control variable k=2 i=[
Figure 751286DEST_PATH_IMAGE007
+
Figure 585340DEST_PATH_IMAGE004
+
Figure 18726DEST_PATH_IMAGE009
+ (
Figure 610245DEST_PATH_IMAGE006
],
H during operator control variable k=3 i=[
Figure 678433DEST_PATH_IMAGE007
+
Figure 595573DEST_PATH_IMAGE004
+
Figure 250676DEST_PATH_IMAGE005
+
Figure 645886DEST_PATH_IMAGE010
], 16 binary message H in scale-of-two deciphering anti-counterfeiting information table iposition control variable initial value design be i=1, first H from scale-of-two deciphering anti-counterfeiting information table 1start, each 16 binary message in scale-of-two deciphering anti-counterfeiting information table are carried out to H i=[
Figure 837089DEST_PATH_IMAGE003
+
Figure 534918DEST_PATH_IMAGE004
+
Figure 801951DEST_PATH_IMAGE005
+ ] decrypt operation, solve scale-of-two anti-counterfeiting information N i, the generation most-significant byte is 0 16 one group scale-of-two anti-counterfeiting information table entirely, removes most-significant byte, generates the scale-of-two anti-counterfeiting information table of 8 group, recovers anti-counterfeiting signal and also exports anti-counterfeiting information.

Claims (1)

1. one kind generates the binary modulated signal by anti-counterfeiting information by cryptographic calculation and chnnel coding, and becomes the three-dimensional binary system antiforging printing method of encrypting of order by the circulation multi-parameter that modulation system is embedded in anti-counterfeiting information in full page of tabling look-up, It is characterized in that:Anti-counterfeiting information is carried out to digitlization, generate the binary system anti-counterfeiting information table of 8 group, anti-counterfeiting information is image information, Word message or trademark information, for preventing from ciphering process producing information spillover, 8 one group of binary messages in binary system anti-counterfeiting information table are expanded to 16 one group of binary messages, the generation most-significant byte is 0 16 one group binary system anti-counterfeiting information table entirely, and 16 binary messages of the group of the i in 16 one group binary system anti-counterfeiting information table are denoted as to N i, i is greater than 0 positive integer, and the eight-digit binary number encryption parameter is denoted as
Figure 2012104018772100001DEST_PATH_IMAGE001
, encryption parameter
Figure 424567DEST_PATH_IMAGE001
Be the positive integer in 0 to 256, two binary operator control variables are denoted as k, the positive integer that operator control variables k is 0<=k<=3, operator
Figure 2012104018772100001DEST_PATH_IMAGE002
Adopt+,-, *, tetra-kinds of operators of ÷, during operator control variables k=0 Be defined as respectively+, * ,+, ÷ ,-, * ,-, ÷ ,+,-, during operator control variables k=1
Figure 421528DEST_PATH_IMAGE002
Be defined as respectively-, * ,+, ÷ ,+, * ,-, ÷ ,+,-, during operator control variables k=2 Be defined as respectively-, ÷ ,+, ÷ ,-, * ,+, * ,+,-, during operator control variables k=3 Be defined as respectively+,-,+, ÷ ,-, * ,-, ÷ ,+, *, during operator control variables k=0 cryptographic calculation be defined as [
Figure 2012104018772100001DEST_PATH_IMAGE003
+
Figure DEST_PATH_IMAGE004
+
Figure 2012104018772100001DEST_PATH_IMAGE005
+
Figure DEST_PATH_IMAGE006
], during operator control variables k=1 cryptographic calculation be defined as [
Figure 2012104018772100001DEST_PATH_IMAGE007
+
Figure DEST_PATH_IMAGE008
+
Figure 841994DEST_PATH_IMAGE005
+
Figure 83619DEST_PATH_IMAGE006
], during operator control variables k=2 cryptographic calculation be defined as [
Figure 732644DEST_PATH_IMAGE007
+ + + (
Figure 963479DEST_PATH_IMAGE006
], during operator control variables k=3 cryptographic calculation be defined as [
Figure 567766DEST_PATH_IMAGE007
+
Figure 20482DEST_PATH_IMAGE004
+
Figure 393826DEST_PATH_IMAGE005
+
Figure DEST_PATH_IMAGE010
], set encryption parameter
Figure 542304DEST_PATH_IMAGE001
Initial value, because of encryption parameter
Figure 368309DEST_PATH_IMAGE001
Be the positive integer in 0 to 256, in 256 numbers, appoint and get
Figure 624715DEST_PATH_IMAGE001
The total 256! of ten different numerals / (256-10)! Plant and follow the example of, set the initial value k=0 of operator control variables k, set 16 binary message N in 16 one group binary system anti-counterfeiting information table iPosition Control variable i=1, first 16 binary message N from 16 one group binary system anti-counterfeiting information table 1Start, to each 16 binary message in 16 one group binary system anti-counterfeiting information table carry out [
Figure 977199DEST_PATH_IMAGE003
+
Figure 795114DEST_PATH_IMAGE004
+
Figure 609879DEST_PATH_IMAGE005
+
Figure 30496DEST_PATH_IMAGE006
] cryptographic calculation, and each 16 binary message is carried out [
Figure 378432DEST_PATH_IMAGE003
+
Figure 491882DEST_PATH_IMAGE004
+ + ] carry out i+1 and k+1 computing when cryptographic calculation, make next computing point to [
Figure 952185DEST_PATH_IMAGE007
+
Figure 613367DEST_PATH_IMAGE008
+ +
Figure 929259DEST_PATH_IMAGE006
] wherein i and k all increased by 1, by each 16 binary message in 16 one group binary system anti-counterfeiting information table carry out [ + +
Figure 449605DEST_PATH_IMAGE005
+
Figure 15715DEST_PATH_IMAGE006
] cryptographic calculation, generating the binary add tight defense fake information table of 16 group, the shape of amplitude is set to two kinds:
Figure 2012104018772100001DEST_PATH_IMAGE011
With
Figure DEST_PATH_IMAGE012
, wherein
Figure 569581DEST_PATH_IMAGE011
Be defined as the numeral 0,
Figure 930155DEST_PATH_IMAGE012
Be defined as numeral 1, utilize the binary add tight defense fake information of 16 group generated through chnnel coding, generation has 16 one group of binary modulated signals of error detecting and error correcting function, original continuous is changed the line map, and image signal is processed (RIP) through rasterizing and hybrid screening is exported halftoning hybrid screening picture signal, comprising amplitude and FM screened image signal, 16 one group of binary modulated signals that utilize to generate adopt the shapes of amplitude in circulation look-up table modulation system modulation hybrid screening picture signals, the shape that makes amplitude according to
Figure 691175DEST_PATH_IMAGE011
With
Figure 936343DEST_PATH_IMAGE012
Regular changing, make adjacent 16 amplitudes in the hybrid screening picture signal carry 16 binary add tight defense fake informations by the change of shape, thereby be created on the hybrid screening picture signal that embeds anti-counterfeiting information in the full page site, realize anti-counterfeit printing.
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CN101699845A (en) * 2009-10-20 2010-04-28 北京印刷学院 Encryption counterfeit printing technology of frequency modulated halftone dot space position for pseudo random signal modulation printed matter
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