CN103942590A - One-parameter multi-element circulation encryption anti-fake information storage trademark - Google Patents
One-parameter multi-element circulation encryption anti-fake information storage trademark Download PDFInfo
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- CN103942590A CN103942590A CN201310022158.4A CN201310022158A CN103942590A CN 103942590 A CN103942590 A CN 103942590A CN 201310022158 A CN201310022158 A CN 201310022158A CN 103942590 A CN103942590 A CN 103942590A
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Abstract
The invention relates to a one-parameter multi-element circulation encryption anti-fake information storage trademark. The trademark is capable of transforming binary system anti-fake information into a binary system modulating signal through multi-element circulation encryption and channel coding, capable of embedding anti-fake information into the whole trademark page by orderly changing conductivity of an amplitude modulation website in a circulation look-up table modulation method, capable of identifying the anti-fake information from any fragment when a trademark is identified and capable of being used in various anti-fake trademarks.
Description
Affiliated technical field:
The present invention relates to a kind of anti-false trademark, the polynary circulation encryption anti-counterfeiting of a kind of one-parameter information storage trade mark particularly, this trade mark can be kept at binary add tight defense fake information and on the trade mark page, realize the false proof of trade mark, and this trade mark can be in extensive stock false proof.
Background technology:
Anti-false trademark, claims again antifalsification label, anti-counterfeiting mark, anti-false sign, anti-fake label, is a kind of proof label of discerning the false from the genuine, preventing personation, be in the commodity process of circulation people for distinguishing true and false, the sign of distinguishing commercial quality quality of merchandise resources.Trademark anti-counterfeit is related to businessman, client and market safety, is related to protection businessman and client's interests.The trade mark of China has carried out innovation audaciously; adopted laser anti-counterfeit, core micropore is false proof, invisible graph is false proof, magnetic ink is false proof, microfilm of characters is false proof, indicia distribution is false proof, light carving is false proof etc.; but struggle false proof and that fake is high-tech trial of strength; advanced anti-counterfeiting technology has certain ageing again; so; must constantly promote trade mark anti-fake technique; could false proof with fake in forever maintain the leading position, this is also that protection businessman and client's interests are maintained the commodity safe basic assurance that circulates.
Summary of the invention:
In order to improve reliability and the security of trademark anti-counterfeit, the deficiency that the present invention is directed to existing trademark anti-counterfeit existence is improved existing trade mark anti-fake technique, a kind of anti-counterfeiting information storage trade mark has been proposed, this trade mark is by the change to amplitude electric conductivity in brand printing, encryption anti-counterfeiting information is embedded on the whole trade mark page with scale-of-two coded signal form, can when brand recognition, from any one fragment, identify encryption anti-counterfeiting information, therefore there is very strong disguise and crush resistance.
The technical solution adopted for the present invention to solve the technical problems is:
Anti-counterfeiting information storage trade mark, by trade mark page paper, be printed on amplitude on trade mark page paper, be printed on the horizontal scanning line on trade mark page paper, the column scan line being printed on trade mark page paper forms, image and word on trade mark page paper consist of amplitude,
According to the binary add tight defense fake information of storage, a part of amplitude on trade mark page paper is printed and is formed by electrically conductive ink, another part amplitude on trade mark page paper is printed and is formed by dielectric ink, and the horizontal scanning line on trade mark page paper and column scan line are printed and formed by electrically conducting transparent ink
The horizontal scanning line being printed on trade mark page paper has N bar, the column scan line being printed on trade mark page paper has M bar, the amplitude being printed on trade mark page paper is divided into the capable M row of N on trade mark paper, amplitude is neatly matrix and arranges on trade mark page paper paper, allow i get 1 to N, allow j get 1 to M, j bar column scan line on trade mark page paper is electrically connected to the basal surface of each amplitude of the row of the j on trade mark page paper, the upper surface of each amplitude that the i bar horizontal scanning line on trade mark page paper is capable with i on trade mark page paper is electrically connected to
In the time the binary message of trade mark page stores need to being read, to N bar horizontal scanning line, be set to successively high level by the 1st on trade mark page paper,
When the 1st horizontal scanning line on trade mark page paper is set to high level, the binary message of the 1st row storage on trade mark page paper is exported from the 1st column scan line to M bar column scan line with 0,1 code form, the 1st row on trade mark page paper is printed the amplitude output binary message 1 forming by electrically conductive ink, the 1st row on trade mark page paper is printed the amplitude output binary message 0 forming by dielectric ink, to other row on trade mark page paper, can repeat above-mentioned readout
In order to realize the encryption storage of trademark anti-counterfeit information, first image false-proof information and character anti-counterfeiting information are carried out to digitized processing, utilize image false-proof information and character anti-counterfeiting information to generate the binary system anti-counterfeiting information table of 8 group, for preventing producing information spillover in ciphering process, each 8 one group of binary system anti-counterfeiting information in binary system anti-counterfeiting information table are expanded to 32 one group of binary system anti-counterfeiting information, generating high 24 is 0 32 one group binary system anti-counterfeiting information table entirely, 32 binary system anti-counterfeiting information of i group in 32 one group binary system anti-counterfeiting information table are denoted as to N
i, 32 the binary add tight defense fake informations of i group in 32 one group binary add tight defense fake information table are denoted as to H
ii is greater than 0 positive integer, binary system is encrypted parameter and is denoted as C, encryption parameter C is the binary system positive integer of 0≤C≤256, binary system is encrypted variable and is denoted as q, j, d, e, f, g, h and r, and encryption variables q, j, d, e, f, g, h and r are 0 to 256 binary system positive integer, and binary operator control variables is denoted as k, the binary system positive integer that binary operator control variables k is 0≤k≤7, operator
adopt+,-, ×, four kinds of operators, when binary operator control variables k=0
be defined as respectively-,+, × ,+, × ,-, × ,+, when binary operator control variables k=1
be defined as respectively+, × ,+,+,-, × ,+, ×,When binary operator control variables k=2
Be defined as respectively-, × ,+,+, × ,-,+,-, when binary operator control variables k=3
Be defined as respectively-, × ,+,-, × ,-,+, ×, when binary operator control variables k=4
Be defined as respectively+, × ,-, × ,+,-,+, ×, when binary operator control variables k=5
Be defined as respectively × ,+, × ,-,+,+,-, ×, when binary operator control variables k=6
Be defined as respectively × ,+,+,-, × ,+,+, ×,When binary operator control variables k=7
Be defined as respectively+, ×, × ,-,+,-,-, ×, when binary operator control variables k=0, polynary circulation cryptographic calculation is defined as
When binary operator control variables k=1, polynary circulation cryptographic calculation is defined as
When binary operator control variables k=2, polynary circulation cryptographic calculation is defined as
When binary operator control variables k=3, polynary circulation cryptographic calculation is defined as
When binary operator control variables k=4, polynary circulation cryptographic calculation is defined as
When binary operator control variables k=5, polynary circulation cryptographic calculation is defined as
When binary operator control variables k=6, polynary circulation cryptographic calculation is defined as
When binary operator control variables k=7, polynary circulation cryptographic calculation is defined as
Set the initial value of encryption parameter C, set the initial value of encryption variables q, j, d, e, f, g, h and r, the initial value of setting binary operator control variables k is k=0, sets 32 binary system anti-counterfeiting information N in 32 one group binary system anti-counterfeiting information table
iPosition Control variable i=1, set 32 binary add tight defense fake information H in 32 one group binary add tight defense fake information table
iPosition Control variable i=1, to N
1Carry out
Polynary circulation cryptographic calculation (wherein k=0), generates first binary add tight defense fake information H in the binary add tight defense fake information table of 32 group
1, to N
1Carry out
When polynary circulation cryptographic calculation, carry out i+1, q+1, j+1, d+1, e+1, f+1, g+1, h+1, r+1 and k+1 computing, next polynary circulation cryptographic calculation is pointed to
(wherein k=1), generates second binary add tight defense fake information H in the binary add tight defense fake information table of 32 group
2, to N
2Carry out
When polynary circulation cryptographic calculation, carry out i+1, q+1, j+1, d+1, e+1, f+1, g+1, h+1, r+1 and k+1 computing,Next polynary circulation cryptographic calculation is pointed to
(wherein k=2), generates the 3rd binary add tight defense fake information H in the binary add tight defense fake information table of 32 group
3, this polynary circulation cryptographic calculation goes on always until last 32 the binary system anti-counterfeiting information in binary system anti-counterfeiting information table, by each 32 the binary system anti-counterfeiting information N in 32 one group binary system anti-counterfeiting information table
icarry out polynary circulation cryptographic calculation, generate and 32 one group 32 the one group binary add tight defense fake information table that binary system anti-counterfeiting information table is corresponding, amplitude in label printing is carried out to digitized processing, amplitude is set to two kinds, wherein print by dielectric ink the amplitude forming and be defined as numeral 0, print by electrically conductive ink the amplitude forming and be defined as numeral 1, in label printing process, utilize the binary add tight defense fake information of 32 group generating by the printing process of the amplitude on the circulation look-up table modulation trade mark page, by selecting dielectric ink and electrically conductive ink to print amplitude, the regular electric conductivity according to above-mentioned two kinds of amplitudes of amplitude on the trade mark page is changed, after modulation, on the trade mark page, adjacent 32 amplitudes form one group of 32 binary message, make to carry anti-counterfeiting information by the variation of amplitude electric conductivity on the trade mark page, and this anti-counterfeiting information is embedded in whole trade mark page site, realize trademark anti-counterfeit, by non-obvious the extractible anti-counterfeiting information that embeds in the trade mark page, can provide valid certificates for true trade mark, there is stronger anti-forgery ability simultaneously.
For solving above-mentioned technical matters, first image false-proof information and character anti-counterfeiting information are carried out to digitized processing, generate the scale-of-two anti-counterfeiting information table of 8 group, each 8 one group of scale-of-two anti-counterfeiting information in scale-of-two anti-counterfeiting information table are expanded to 32 one group of scale-of-two anti-counterfeiting information, generating high 24 is 0 32 one group scale-of-two anti-counterfeiting information table entirely, each 32 scale-of-two anti-counterfeiting information in 32 one group scale-of-two anti-counterfeiting information table are carried out to polynary circulation cryptographic calculation, generate the binary add tight defense fake information table of 32 group, utilize 32 binary add tight defense fake informations process chnnel codings in binary add tight defense fake information table, generation has the binary modulated signal of 32 group of error detecting and error correcting function, chnnel coding can adopt loop coding, convolutional encoding or Turbo coding various ways, trade mark page 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 32 one group of binary modulated signals that generate to adopt the electric conductivity of amplitude in circulation look-up table modulation system modulation hybrid screening picture signal, the electric conductivity that makes amplitude is according to dielectric ink amplitude and electrically conductive ink amplitude is regular changes, make adjacent 32 amplitudes in hybrid screening picture signal carry 32 scale-of-two anti-counterfeiting information by the change of electric conductivity, thereby be created on the hybrid screening picture signal that embeds anti-counterfeiting information in whole trade mark page site, realize the false proof of trade mark.
When extracting anti-counterfeiting information, first gather trade mark page site electric conductivity signal, through the identification to the electric conductivity of amplitude, differentiate the electric conductivity of amplitude, extract the electric conductivity information of amplitude, the electric conductivity information of demodulation trade mark page amplitude, export the binary modulated signal of 32 group, the binary modulated signal of 32 one group to demodulation output carries out channel-decoding, after channel-decoding, generate scale-of-two deciphering anti-counterfeiting information table, 32 binary messages of i group that scale-of-two is deciphered in anti-counterfeiting information table are denoted as M
i.
Scale-of-two is deciphered to 32 binary message M in anti-counterfeiting information table
ithe initial value design of position control variable i be i=1, the initial value when initial value of setting encryption parameter C is encryption, the initial value when initial value of setting encryption variables q, j, d, e, f, g, h and r is encryption, the initial value design of binary operator control variable k is k=0, known by polynary circulation ciphering process, during binary operator control variable k=0, decrypt operation is
during binary operator control variable k=1, decrypt operation is
during binary operator control variable k=2, decrypt operation is
during binary operator control variable k=3, decrypt operation is
during binary operator control variable k=4, decrypt operation is
during binary operator control variable k=5, decrypt operation is
during binary operator control variable k=6, decrypt operation is
during binary operator control variable k=7, decrypt operation is
first M from scale-of-two deciphering anti-counterfeiting information table
1start, to each 32 the binary message M in scale-of-two deciphering anti-counterfeiting information table
icarry out corresponding decrypt operation, solve scale-of-two anti-counterfeiting information N
i, generating high 24 is 0 32 one group scale-of-two anti-counterfeiting information table entirely, removes highly 24, recovers to generate the scale-of-two anti-counterfeiting information table of 8 group, recovers anti-counterfeiting signal and also exports anti-counterfeiting information.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further described.
Fig. 1 is one-piece construction figure of the present invention.
Fig. 2 is A-A cut-open view of the present invention.
Fig. 3 loads anti-counterfeiting information process flow diagram.
Fig. 4 extracts anti-counterfeiting information process flow diagram.
Embodiment
In Fig. 1 and Fig. 2, encryption anti-counterfeiting information storage trade mark, by trade mark page paper 7-1, be printed on amplitude 6-1 on trade mark page paper 7-1 to 6-150, be printed on horizontal scanning line 1-1 on trade mark page paper 7-1 and form to 2-10 to 1-15, the column scan line 2-1 that is printed on trade mark page paper 7-1, image and word on trade mark page paper 7-1 consist of to 6-150 amplitude 6-1
According to storage binary add tight defense fake information, a part of amplitude on trade mark page paper 7-1 is printed and is formed by electrically conductive ink, another part amplitude on trade mark page paper 7-1 is printed and is formed by dielectric ink, horizontal scanning line 1-1 on trade mark page paper 7-1 is printed and is formed by electrically conducting transparent ink to 2-10 to 1-15 and column scan line 2-1
In Fig. 1, the dark amplitude on trade mark page paper 7-1 is printed and is formed by electrically conductive ink, and the light amplitude on trade mark page paper 7-1 is printed and formed by dielectric ink,
The amplitude being printed on trade mark page paper 7-1 is divided into 15 row 10 row on trade mark paper, amplitude 6-1 is neatly matrix and arranges on trade mark page paper 7-1 to 6-150, allow i get 1 to 15, allow j get 1 to 10, j bar column scan line on trade mark page paper 7-1 is electrically connected to the basal surface of each amplitude of j row on trade mark page paper 7-1, the upper surface of each amplitude that the i bar horizontal scanning line on trade mark page paper 7-1 is capable with i on trade mark page paper 7-1 is electrically connected to
In the time the binary add tight defense fake information of trade mark page stores need to being read, 15 horizontal scanning lines of the 1st horizontal scanning line to the on trade mark page paper 7-1 are set to high level successively,
When the 1st horizontal scanning line 1-1 on trade mark page paper 7-1 is set to high level, the binary add tight defense fake information of the 1st row storage on trade mark page paper 7-1 is with 0, 1 code form is from 10 column scan line outputs of the 1st column scan line to the, the 1st row on trade mark page paper 7-1 is printed and is formed amplitude output binary message 1 by electrically conductive ink, the 1st row on trade mark page paper 7-1 is printed and is formed amplitude output binary message 0 by dielectric ink, therefore the binary add tight defense fake information 1100001000 that the 1st row is read, to other row on trade mark page paper 7-1, can repeat above-mentioned readout.
In loading anti-counterfeiting information process flow diagram 3, original anti-counterfeiting information (image, word) is through digitized processing, generate the scale-of-two anti-counterfeiting information table of 8 group, 8 one group of binary messages in scale-of-two anti-counterfeiting information table are expanded to 32 one group of binary messages, generating high 24 is 0 32 one group scale-of-two anti-counterfeiting information table entirely, and 32 binary messages of i group in 32 one group scale-of-two anti-counterfeiting information table are denoted as N
i, i is greater than 0 positive integer, first 32 the binary add tight defense fake information N from 32 one group scale-of-two anti-counterfeiting information table
istart, to each 32 the scale-of-two anti-counterfeiting information N in 32 one group scale-of-two anti-counterfeiting information table
icarry out polynary circulation cryptographic calculation, generate and 32 one group 32 the one group binary add tight defense fake information table that scale-of-two anti-counterfeiting information table is corresponding, amplitude in label printing is carried out to digitized processing, amplitude is set to two kinds, wherein by dielectric ink, print the amplitude forming and be defined as numeral 0, by electrically conductive ink, print the amplitude forming and be defined as numeral 1, in label printing process, utilize the binary add tight defense fake information of 32 group generating by the printing process of the amplitude on the circulation look-up table modulation trade mark page, by selecting dielectric ink and electrically conductive ink to print amplitude, the regular electric conductivity according to above-mentioned two kinds of amplitudes of amplitude on the trade mark page is changed, after modulation, on the trade mark page, adjacent 32 amplitudes form one group of 32 binary message, make by the variation of amplitude electric conductivity, to carry anti-counterfeiting information on the trade mark page, and this anti-counterfeiting information is embedded in whole trade mark page site, realize trademark anti-counterfeit printing, by non-obvious the extractible anti-counterfeiting information that embeds in the trade mark page, realize trademark anti-counterfeit.
In extracting anti-counterfeiting information process flow diagram 4, when extracting anti-counterfeiting information, first gather the electric conductivity signal of trade mark page halftone dot image, through the electric conductivity identification to amplitude, differentiate the electric conductivity of amplitude, extract the electric conductivity information of amplitude, the electric conductivity information of demodulation trade mark page amplitude, export the binary modulated signal of 32 group, the binary modulated signal of 32 one group to demodulation output carries out channel-decoding, generates scale-of-two deciphering anti-counterfeiting information table after channel-decoding.
By 32 binary message M in the scale-of-two deciphering anti-counterfeiting information table generating after decoding
ithe initial value design of position control variable i be i=1, the initial value when initial value of setting encryption parameter C is encryption, the initial value when initial value of setting encryption variables q is encryption, the initial value design of binary operator control variable k is k=0, first M from the scale-of-two deciphering anti-counterfeiting information table generating
1start, to each 32 the binary message M in scale-of-two deciphering anti-counterfeiting information table
ibe decrypted computing, solve scale-of-two anti-counterfeiting information N
i, generating high 24 is 0 32 one group scale-of-two anti-counterfeiting information table entirely, removes highly 24, recovers to generate 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 binary modulated signal by anti-counterfeiting information by cryptographic calculation and chnnel coding, and by the circulation modulation system of tabling look-up, anti-counterfeiting information is embedded in to the polynary circulation encryption anti-counterfeiting of one-parameter information in full page storage trade mark, it is characterized in that: anti-counterfeiting information storage trade mark, by trade mark page paper, be printed on the amplitude on trade mark page paper, be printed on the horizontal scanning line on trade mark page paper, the column scan line being printed on trade mark page paper forms, according to the binary add tight defense fake information of storage, a part of amplitude on trade mark page paper is printed and is formed by electrically conductive ink, another part amplitude on trade mark page paper is printed and is formed by dielectric ink, horizontal scanning line on trade mark page paper and column scan line are printed and are formed by electrically conducting transparent ink,
In order to realize the encryption storage of trademark anti-counterfeit information, first image false-proof information and character anti-counterfeiting information are carried out to digitized processing, utilize image false-proof information and character anti-counterfeiting information to generate the binary system anti-counterfeiting information table of 8 group, for preventing producing information spillover in ciphering process, each 8 one group of binary system anti-counterfeiting information in binary system anti-counterfeiting information table are expanded to 32 one group of binary system anti-counterfeiting information, generating high 24 is 0 32 one group binary system anti-counterfeiting information table entirely, and 32 the binary system anti-counterfeiting information of i group in 32 one group binary system anti-counterfeiting information table are denoted as to N
i32 binary add tight defense fake informations of i group in 32 one group binary add tight defense fake information table are denoted as to Hi, i is greater than 0 positive integer, binary system is encrypted parameter and is denoted as C, encryption parameter C is the binary system positive integer of 0≤C≤256, binary system is encrypted variable and is denoted as q, j, d, e, f, g, h and r, encryption variables q, j, d, e, f, g, h and r are 0 to 256 binary system positive integer, binary operator control variables is denoted as k, the binary system positive integer that binary operator control variables k is 0≤k≤7, operator
Adopt+,-, ×, four kinds of operators, when binary operator control variables k=0
Be defined as respectively-,+, × ,+, × ,-, × ,+, when binary operator control variables k=1
Be defined as respectively+, × ,+,+,-, × ,+, ×,When binary operator control variables k=2
Be defined as respectively-, × ,+,+, × ,-,+,-, when binary operator control variables k=3
Be defined as respectively-, × ,+,-, × ,-,+, ×, when binary operator control variables k=4
Be defined as respectively+, × ,-, × ,+,-,+, ×, when binary operator control variables k=5
Be defined as respectively × ,+, × ,-,+,+,-, ×, when binary operator control variables k=6
Be defined as respectively × ,+,+,-, × ,+,+, ×,When binary operator control variables k=7
Be defined as respectively+, ×, × ,-,+,-,-, ×, when binary operator control variables k=0, polynary circulation cryptographic calculation is defined as
When binary operator control variables k=1, polynary circulation cryptographic calculation is defined as
When binary operator control variables k=2, polynary circulation cryptographic calculation is defined as
When binary operator control variables k=3, polynary circulation cryptographic calculation is defined as
When binary operator control variables k=4, polynary circulation cryptographic calculation is defined as
When binary operator control variables k=5, polynary circulation cryptographic calculation is defined as
When binary operator control variables k=6, polynary circulation cryptographic calculation is defined as
When binary operator control variables k=7, polynary circulation cryptographic calculation is defined as
Set the initial value of encryption parameter C, set the initial value of encryption variables q, j, d, e, f, g, h and r, the initial value of setting binary operator control variables k is k=0, sets 32 binary system anti-counterfeiting information N in 32 hyte binary system anti-counterfeiting information tables
iPosition Control variable i=1, set 32 binary add tight defense fake information H in 32 one group binary add tight defense fake information table
iPosition Control variable i=1, to N
iCarry out
Polynary circulation cryptographic calculation (wherein k=0), generates first binary add tight defense fake information H1 in the binary add tight defense fake information table of 32 group, to N
iCarry out
When polynary circulation cryptographic calculation, carry out i+1, q+1, j+1, d+1, e+1, f+1, g+1, h+1, r+1 and k+1 computing, next polynary circulation cryptographic calculation is pointed to
(wherein k=1), generates second binary add tight defense fake information H in the binary add tight defense fake information table of 32 group
2, to N
2Carry out
When polynary circulation cryptographic calculation, carry out i+1, q+1, j+1, d+1, e+1, f+1, g+1, h+1, r+1 and k+1 computing,Next polynary circulation cryptographic calculation is pointed to
(wherein k=2), generate the 3rd binary add tight defense fake information H3 in the binary add tight defense fake information table of 32 group, this polynary circulation cryptographic calculation goes on always until last 32 the binary system anti-counterfeiting information in binary system anti-counterfeiting information table, by each 32 the binary system anti-counterfeiting information N in 32 one group binary system anti-counterfeiting information table
icarry out polynary circulation cryptographic calculation, generate and 32 one group 32 the one group binary add tight defense fake information table that binary system anti-counterfeiting information table is corresponding, amplitude in label printing is carried out to digitized processing, amplitude is set to two kinds, wherein print by dielectric ink the amplitude forming and be defined as numeral 0, print by electrically conductive ink the amplitude forming and be defined as numeral 1, in label printing process, utilize the binary add tight defense fake information of 32 group generating by the printing process of the amplitude on the circulation look-up table modulation trade mark page, by selecting dielectric ink and electrically conductive ink to print amplitude, the regular electric conductivity according to above-mentioned two kinds of amplitudes of amplitude on the trade mark page is changed, after modulation, on the trade mark page, adjacent 32 amplitudes form one group of 32 binary message, make to carry anti-counterfeiting information by the variation of amplitude electric conductivity on the trade mark page, and this anti-counterfeiting information is embedded in whole trade mark page site, realize trademark anti-counterfeit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310022158.4A CN103942590B (en) | 2013-01-22 | 2013-01-22 | One-parameter multi-element circulation encryption anti-fake information storage trademark |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109686228A (en) * | 2018-12-21 | 2019-04-26 | 广东石油化工学院 | Invisible trademark method for anti-counterfeit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5425103A (en) * | 1994-03-14 | 1995-06-13 | Shaw; William Y. | Variable-key cryptography system |
| CN1928916A (en) * | 2006-08-21 | 2007-03-14 | 顾泽苍 | Printing medium certificate documents and false proof handling method of copy thereof |
| 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 |
| CN102184428A (en) * | 2011-04-14 | 2011-09-14 | 北京印刷学院 | Encrypting anti-counterfeiting printing technology for modulating shapes of amplitude modulation dots of printed work through binary-system encrypting signal |
-
2013
- 2013-01-22 CN CN201310022158.4A patent/CN103942590B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5425103A (en) * | 1994-03-14 | 1995-06-13 | Shaw; William Y. | Variable-key cryptography system |
| CN1928916A (en) * | 2006-08-21 | 2007-03-14 | 顾泽苍 | Printing medium certificate documents and false proof handling method of copy thereof |
| 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 |
| CN102184428A (en) * | 2011-04-14 | 2011-09-14 | 北京印刷学院 | Encrypting anti-counterfeiting printing technology for modulating shapes of amplitude modulation dots of printed work through binary-system encrypting signal |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109686228A (en) * | 2018-12-21 | 2019-04-26 | 广东石油化工学院 | Invisible trademark method for anti-counterfeit |
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