CN104239928B - Anti-counterfeiting printed matter and corresponding anti-counterfeiting method - Google Patents

Anti-counterfeiting printed matter and corresponding anti-counterfeiting method Download PDF

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Publication number
CN104239928B
CN104239928B CN201410423829.2A CN201410423829A CN104239928B CN 104239928 B CN104239928 B CN 104239928B CN 201410423829 A CN201410423829 A CN 201410423829A CN 104239928 B CN104239928 B CN 104239928B
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data
counterfeiting
image
checking data
checking
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CN104239928A (en
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代家红
尹康德
郭锦程
郭丽
杨娟
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ENDIAN TECH IND DEVELOPMENT Co Ltd YUNNAN
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ENDIAN TECH IND DEVELOPMENT Co Ltd YUNNAN
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Abstract

The invention provides a piece of anti-counterfeiting printed matter and a corresponding anti-counterfeiting method, and relates to the technical field of anti-counterfeiting printing. According to the anti-counterfeiting printed matter, the random characteristics shown by paper base material due to the material texture and the random graphic characteristics formed through later-period fabrication processing independently serve as or are combined to serve as the anti-counterfeiting characteristics of the anti-counterfeiting printed matter, specific characteristic data are collected by several times so that single anti-counterfeiting characteristic original data or combined anti-counterfeiting characteristic original data can be obtained, a background database is then uploaded, different single anti-counterfeiting characteristic original data or combined anti-counterfeiting characteristic original data are matched with different users when anti-counterfeiting verification is conducted, and therefore an ordinary consumer can conduct identification on single characteristics to distinguish true commodities from false commodities, professional institutes or supervisory organizations can verify the combined anti-counterfeiting characteristics to supervise and control enterprise production, and the anti-counterfeiting efficacy and the functions of the anti-counterfeiting printed matter are maximized.

Description

A kind of anti-counterfeit printed and corresponding method for anti-counterfeit
Technical field
The present invention relates to a kind of anti-counterfeit printed and corresponding method for anti-counterfeit.
Background technology
Common tradition anti-counterfeiting technology is broadly divided into two big class, and the first kind is by increasing difficulty that is imitated, replicating anti-counterfeiting characteristic Spend, such as laser hologram, laser marking, specialty inks, special paper etc. false proof to realize;
Laser class anti-counterfeiting technology:Not equipment is specially controlled in country for laser hologram making apparatus and laser marking machine, has identical setting Standby just energy is counterfeit to be obtained the same it is easy to high-volume is faked, and is difficult to tell truth from falsehood, substantially loses antiforge function.
Ink paper anti-counterfeiting technology:The big small enterprise producing ink paper is thousands of, and technology is open, and formula material is easily Can obtain, be very easy to copy it is difficult to tell truth from falsehood.
Also have a class anti-counterfeiting technology, the collection that its intuitively mark being arranged on product is only used as an information distinguish into Mouthful, the manufacture of this mark itself is relatively simple, often only comprises to distinguish the region that cursor, bar code, numeral etc. can be distinguished, key Counterfeit protection measures are the data verification on its backstage after mark recognition, such as code, two-dimension code anti-counterfeit technology.
, there is problems with code anti-fake technology:1st, examination utilization rate is very low, and inquiry mode does not meet mass consumption and practises Used, the query rate of existing telephone service system is less than 1%;2nd, easily it is replicated personation, system vulnerable:Digital code anti-false skill Complete digital code information is labeled on commodity art, and fake producer can take and artificially collects, obtains false proof number using modes such as programs Code, itself do not have the code label of false proof guarantee can copy in batches easily, and palm off kinds of goods enter realm of sale after be difficult It is found.After one genuine number is queried once, system typically has record, and when this number is inquired about again, system can be pointed out Query history, and watch out for personation, instead genuine piece has become personation;3rd, code is inquired about costly, and code anti-fake company needs to get a profit, Query rate must be controlled within low-down ratio, typically sign and can guarantee that the inquiry of profit limits with telecommunication department in advance Volume, artificially arranges system disorders, so that consumer is run into busy tone broken string when calling and cannot inquire about.Code anti-fake company also will Every sets of numbers defines shorter effect duration, and the resource such as telephone line that code anti-fake company is had is limited, if Query rate exceeds limit, and inquiry system exceeds load, and loss in code anti-fake company, once code anti-fake Company Bankruptcy falls Close, then false proof code all lost efficacy, the code label being arranged on commodity performs practically no function.
Two-dimension code anti-counterfeit technology:Quick Response Code can carry a lot of information, and the Quick Response Code by setting in items scanning is permissible Realize quick linking with mobile Internet, this combines with mobile Internet just to Quick Response Code and provides base for false proof utilization Plinth.The Application in Anti-counterfeiting form that existing Quick Response Code is combined with mobile Internet is mainly:Comprise the pattern in 2 D code of website information It is printed in commodity packaging, after consumer buys commodity, using terminal unit, this Quick Response Code is distinguished, by wherein comprising Website links enter website, then carry out the checking of commodity true and false, and a certain degree of interaction, simple and fast can be carried out.But It is that imitation difficulty is low because the manufacturing technology of single two-dimensional code product is too universal, using the fishing website of Quick Response Code link Frequently occur, or even have lawless person that Quick Response Code virus link is hidden in Quick Response Code, user is sweeping Quick Response Code using mobile phone When infection virus, all information such as ID (identity number) card No., mobile-phone payment identifying code the phenomenon such as are easily obtained, these all seriously shadows Ring Quick Response Code development false proof online, compromised public interest, have impact on the confidence that the public applies the Internet.
In recent years, each anti-counterfeiting technology producer tended to manufacture anti-counterfeiting mark by the way of being randomly provided, and first passed through Random pattern or structure setting on base material, and are arranged a coding that can inquire about or labelling by various means simultaneously, Then collection comprises the picture of these random patterns or structure, and this picture is corresponded with the coding that can inquire about or labelling It is stored in data base, when inquiring about this coding or labelling, can be shown that the picture of preservation.
For example《A kind of false proof method 02135547.9 of utilization visiable random structure characteristic》, disclose using visible random The false proof method of architectural feature, it is critical only that visiable random structure characteristic adopts ink or coating in printing or coating process Or the visiable random structure characteristic producing during after printing or application.
Again for example《Extract and the method for anti-counterfeit 200510121437.1 using random distribution fiber characteristics of image》, by carrying The geometric characteristic of intersection feature, fiber lines direction character and lines taking article random distribution fiber is confirming article Distinctive feature, then arrange random distribution fiber feature data base, differentiate article genuine-fake when, only need on item inspecting Fibre characteristics information, can identify the true and false of article, be used for preventing article counterfeiting.
The know-why of above-mentioned two patent documents is basically identical, is all to make the feature of predetermined substance random distribution combination For anti-counterfeiting characteristic, and gather image and form image information data storehouse, by carrying out product to be verified with the image in data base Compare, so that it is determined that the verity of product.But come with some shortcomings, first although the two described anti-counterfeiting characteristic is referred to as " random ", but still be the effect obtained by being deliberately controlled by when manufacturing anti-fake product, these steps artificially deliberately controlling Suddenly it is possible to provide imitated " entrance " to fake producer, and its anti-counterfeiting characteristic is excessively single, false proof effect has to be hoisted.
Secondly, the method for anti-counterfeit described in 02135547.9 is based entirely on whole on gathered image and product to be verified Detail contrast, and ordinary consumer does not have wish at all, has no ability to the details in kind and gathered image has been carried out yet It is complete that to comparison, it is showy and not substantial that this results in this method for anti-counterfeit, possible in theory, is practically without more practical values, and For the image that obtains can clearly reflecting described random features it is desirable to the higher image capture device of service precision, And high-quality image is also required to the data base with more preferable data storage and reading performance, these all can greatly increase into This, carry out improving the unit price using the method product after cost is married again, and leads to product competitiveness to decline, these factors all can shadow Ring the wish that manufacturing enterprise adopts this method for anti-counterfeit.Therefore, the method for anti-counterfeit described in 200510121437.1 its collection image and The program of Qualify Phase is excessively complicated, is mainly used in the specialities of special industry such as bank note manufacture, the scope of application is narrower.
In sum, really outstanding anti-fake product and system it should the anti-counterfeiting characteristic that includes there is high technology content and High imitation difficulty, even not reproducible anti-fake product, also should include a quick, cheap checking approach simultaneously, can After enough above-mentioned anti-counterfeiting characteristic being identified, reads with carrying out fast and reliable, it is converted into ordinary consumer and can be tested by simple approach Card, the method distinguishing commodity true and false, being summed up is exactly difficult to copy, easily differentiate or use requirement is low, cost is little.
Content of the invention
For solving problems of the prior art, it is an object of the invention to provide a kind of anti-counterfeit printed and corresponding Method for anti-counterfeit, this anti-counterfeit printed random character that paper substrates itself are manifested because of material, and late stage process process The random figure feature being formed as this anti-counterfeit printed anti-counterfeiting characteristic, and carries out special characteristic individually or after combination by several times The collection of data, obtains single or combination anti-counterfeiting characteristic initial data, uploads background data base afterwards, when carrying out fake certification According to the different single or combination anti-fake feature initial data of the type matching of user, realizing ordinary consumer can be by list One feature is differentiated, to distinguish commodity true and false, professional institution or supervisory organ then can verify to combination anti-fake feature, with Realize the supervision that enterprise produces and sells is controlled, so that this anti-counterfeit printed false proof effect and function is maximized.
For achieving the above object, the present invention employs the following technical solutions:A kind of anti-counterfeit printed, including paper substrates 1, determine Position labelling 3, data verification threshold marker 2, base material anti-counterfeiting characteristic area 4 and later stage setting anti-counterfeiting characteristic area 5;
Described telltale mark 3 is arranged on any one right angle of this anti-counterfeit printed rectangle Printing Zone, printing and Play the role of positioning during image acquisition;Described data verification threshold marker 2 is arranged on the left end of this anti-counterfeit printed rectangle Printing Zone Or right-hand member, comprise the link information that generic terminal devices can read, and the demand according to this leaflet production quantity and apply for, And generate unique code after examination & verification;Described base material anti-counterfeiting characteristic area 4 is arranged on the relative position of data verification threshold marker 2, bag The natural hole not affecting printing performance carrying in itself containing paper substrates 1;Described later stage setting anti-counterfeiting characteristic area 5 is compounded in base material In anti-counterfeiting characteristic area 4, comprise later stage setting random image, be evenly distributed with ultraviolet in the raw material that random image is used and irradiate Visible microgranule, is also distributed with same microgranule in described random image, and these microgranules show the contour feature of this random image Information.
Described data verification threshold marker 2 is the discernible labelling of any one generic terminal devices, for example one-dimension code, two Dimension code etc..
The random image that the described later stage arranges anti-counterfeiting characteristic area 5 is generated using spray printing mode.
Described random image spray printing is raw materials used can to make coloured or colourless ink, pigment, plant extract etc..
A kind of based on above-mentioned anti-counterfeit printed method for anti-counterfeit, comprise the following steps:
A, anti-counterfeit printed preparation and checking data acquisition phase
A-a, first according to anti-counterfeit printed size requirements, rectangle Printing Zone predetermined on paper substrates 1 any One right angle arranges telltale mark 3;
A-b, set up a data center and corresponding management system, management system is according to this leaflet production quantity Demand and apply for and through examination & verification after generate unique code section, the link information of this data center is integrated into unique code section simultaneously Data verification threshold marker 2, in the presence of telltale mark 3, this data verification threshold marker 2 is printed on respective regions;
A-c, complete telltale mark 3 setting paper substrates 1 pass through darkroom, light source irradiate under, be arranged on light source opposite Base material anti-counterfeiting characteristic area 4 image that amplified by micro- amplification composite shot of camera acquisition, then pass through image processor Image is analyzed, the position of natural hole image showing existing for paper substrates 1 is being pushed up based on telltale mark 3 Point carries out coordinate setting on the quadrantal diagram of initial point, only extracts coordinate diagram, and this coordinate diagram is stored in data center, as checking Data A;
A-d, through data acquisition first semi-finished product enter random image setting process, in base material anti-counterfeiting characteristic area 4 Carry out the spray printing of random image, this spray printing position can be in certain limit in the coordinate system with the summit of telltale mark 3 as initial point Interior random regulation is arranged, and meanwhile, the raw materials used quantity of each spray printing, spray printing angle are all adjusted within the specific limits at random Section, spray printing terminates, and is dried according to raw materials used middle moisture situation, and leaflet enters UV irradiation chamber afterwards, Under ultraviolet light source shines, in random image, the microgranule of distribution displays, and image collecting device is by the number of coordinates of Particle Distribution According to recording, and through software processes, abandon the microgranule within image, retain the microgranule number of coordinates of outer display image profile According to, and this data is stored in data center, as checking data B;
Checking data B of checking data A that A-e, step A-c are gathered and the collection of step A-d is with the summit of telltale mark 3 Overlapped for initial point, as checking data C;
B, the Qualify Phase of authenticity of products:
B-a, inquiry request object are arranged on this anti-counterfeit printed data in commodity packaging by mobile terminal recognition and test Card threshold marker 2, as needed, mobile terminal can carry out the download of corresponding software and installation it is also possible to direct access data In in the minds of corresponding data, in this process, by the application of aforementioned management system, examination & verification generate unique code flow process, enter Row primary false proof it is ensured that the verity of link entrance;
B-b, mobile terminal are uploaded to data center by distinguishing result, according to request object after being compared by data center Type, reach mobile terminal under the Query Result of corresponding checking data that will comprise to pre-deposit;
On the checking data that data center is fed back by B-c, inquiry request object and product to be verified anti-counterfeit printed enter Row contrast, according to the difference of request object, has checking data A+ product to be verified, checking data B+ product to be verified, checking number According to three kinds of verification modes of C+ product to be verified, compare whether the coordinate points of the two coincide respectively, concrete mode is respectively:Checking number According to A+ product to be verified, anti-counterfeit printed from back side illuminaton using ordinary light source, the natural hole printing opacity in paper substrates 1 is better than it Remaining part is divided, and whether the coordinate points of comparison checking data A are identical with the position of natural hole;Checking data B+ product to be verified, uses UV-device front illuminated is anti-counterfeit printed, compares the microgranule profile that the displays coordinate position whether with checking data B It coincide;Checking data C+ product to be verified, is verified using above two mode successively.
It is that user opens any barcode scanning client downloads, link that described mobile terminal carries out respective downloaded and the mode of installation Any one in downloading to enterprise web site download and third-party application market.
The present invention has advantages below:
The present invention is by the original random character of paper substrates 1, the random image feature knot arranging on base material with the later stage Conjunction is produced, and has higher false proof grade, and meanwhile, the collection capacity of checking data is relatively fewer, only need to include two kinds false proof The accurate coordinate position of feature, possesses imitation difficulty height, but the checking better simply feature of the true and false.
Present invention employs the approach of network verification, be just provided with strict management program, data verification from checking entrance Entrance not only comprises link information, also contains simultaneously generate through request, unique code of examination & verification management, it is to avoid wrong chain The authentication failed that the information of connecing causes.
Three kinds of checking data of the present invention are respectively provided with non-reproduction, and the anti-counterfeiting characteristic being formed after particularly combining is only One, even original production person also cannot replicate, anti-counterfeit printed production completes, and checking data is stored in data center, other people Cannot contact, solve typically anti-counterfeit printed easily copied, the not high deficiency of anti-counterfeiting performance, and the present invention will be above-mentioned anti- Pseudo- leaflet is combined with background management system and mobile terminal, there is provided one integrates circulation, reviews inquiry, false proof Commodity counterfeit prevention solution, and revene lookup very simple, without specialized technical knowledge, this contributes to anti-counterfeiting technology knowledge Propagation, make user gladly check the true and false, finally make fake and forged commodity lose market, enterprise break away from fake and forged commodity puzzlement, keep Good development.
Brief description
Fig. 1 anti-counterfeit printed structural representation of the present invention.
Fig. 2 is the flow chart of method for anti-counterfeit of the present invention.
In figure, paper substrates 1, data verification threshold marker 2, telltale mark 3, base material anti-counterfeiting characteristic area 4, later stage setting are anti- Pseudo-characteristic area 5.
Specific embodiment
With reference to specific embodiment, the present invention will be further described.
Embodiment 1:As shown in figure 1, the one kind described in the present embodiment is anti-counterfeit printed, including paper substrates 1, telltale mark 3rd, data verification threshold marker 2, base material anti-counterfeiting characteristic area 4 and later stage setting anti-counterfeiting characteristic area 5;Described telltale mark 3 is arranged In the lower left corner right angle of this anti-counterfeit printed rectangle Printing Zone, play the role of positioning in printing and image acquisition;Described number It is arranged on the left end of this anti-counterfeit printed rectangle Printing Zone according to checking threshold marker 2, using Quick Response Code form, wherein comprise common The link information that terminal unit can read, and the demand according to this leaflet production quantity and apply for and through examination & verification after generate Unique code;Described base material anti-counterfeiting characteristic area 4 is arranged on the right-hand member of this anti-counterfeit printed rectangle Printing Zone, comprises paper substrates 1 The natural hole not affecting printing performance that body carries;Described later stage setting anti-counterfeiting characteristic area 5 is compounded in base material anti-counterfeiting characteristic area 4 On, comprise later stage setting random image, random image adopts ink-jetting style to generate, is evenly distributed with ultraviolet in the ink being used Line irradiates visible microgranule, these microgranules is similarly distributed with, these microgranules show this random image in described random image Contour feature information.
A kind of based on above-mentioned anti-counterfeit printed method for anti-counterfeit, comprise the following steps:
A, anti-counterfeit printed preparation and checking data acquisition phase
A-a, the anti-counterfeit printed size of setting are 50mm*18mm, then predetermined on paper substrates 1 rectangle Printing Zone Lower right corner right angle setting telltale mark 3;
A-b, set up a data center and corresponding management system, management system is according to this leaflet production quantity Demand and apply for and generate unique two dimensional code segment after examination & verification, simultaneously by the link information of this data center with unique Single Quick Response Code in two dimensional code segment is integrated into data verification threshold marker 2, in the presence of telltale mark 3, by this data Checking threshold marker 2 is printed on the left end of rectangle Printing Zone;
A-c, complete telltale mark 3 setting paper substrates 1 pass through darkroom, parallel light source irradiate under, be arranged on light Base material anti-counterfeiting characteristic area 4 image that the ccd video camera collection on source opposite is amplified by micro- amplification composite shot, then passes through figure As processor is analyzed to image, by the position of the natural hole showing on image existing for paper substrates 1 based on fixed Position labelling 3 summit is to carry out coordinate setting on the quadrantal diagram of initial point, extracts coordinate diagram, and this coordinate diagram is stored in data center, As checking data A;
A-d, through data acquisition first semi-finished product enter printing process, through ink-jet in base material anti-counterfeiting characteristic area 4 Obtain random image, after drying, enter UV irradiation chamber, under ultraviolet light source shines, in random image, the microgranule of distribution shows Reveal to come, the coordinate data of Particle Distribution is recorded by image collecting device, and through software processes, abandons micro- within image Grain, retains the microgranule coordinate data of outer display image profile, and this data is stored in data center, as checking data B;
Checking data B of checking data A that A-e, step A-c are gathered and the collection of step A-d is with the summit of telltale mark 3 Overlapped for initial point, as checking data C;
B, the Qualify Phase of authenticity of products:
Quick Response Code is scanned by mobile phone in commodity packaging in consumer, and mobile phone is uploaded to data center by distinguishing result, number After comparing according to center, confirmation request object is individual, selects the verification mode using " checking data A+ product to be verified ", Mobile terminal will be reached, consumer uses ordinary light source to shine from the back side under the Query Result of checking data A comprising to pre-deposit Penetrate anti-counterfeit printed, the natural hole printing opacity in paper substrates 1 is better than remainder, the coordinate points of comparison checking data A whether with On this commodity counterfeit prevention leaflet, the position of natural hole coincide.
Embodiment 2:Other of the present embodiment are consistent with embodiment 1, and difference is the Qualify Phase of authenticity of products, request visitor Body is corporate regulator, scans Quick Response Code by recognizing apparatus in commodity packaging, and recognition result is uploaded in data The heart, after data center compares, confirmation request object is corporate regulator, selects using " checking data C+ product to be verified The verification mode of product ", will reach recognizing apparatus under the Query Result of checking data C comprising to pre-deposit, first by common Light source is anti-counterfeit printed from back side illuminaton, and whether the coordinate points of comparison checking data A are identical with the position of the natural hole showing, Then anti-counterfeit printed using UV-device front illuminated, compare the microgranule profile that displays whether with checking data B Coordinate position coincide.

Claims (2)

1. a kind of anti-counterfeit printed corresponding method for anti-counterfeit is it is characterised in that comprise the following steps:
A, anti-counterfeit printed preparation and checking data acquisition phase:
A-a, first according to anti-counterfeit printed size requirements, in paper substrates(1)Above predetermined rectangle Printing Zone is any one Individual right angle arranges telltale mark(3);
A-b, set up a data center and corresponding management system, management system is according to the demand of this leaflet production quantity And apply for and generate unique code section after examination & verification, the link information of this data center and unique code section are integrated into data simultaneously Checking threshold marker(2), in telltale mark(3)In the presence of, by this data verification threshold marker(2)It is printed on respective regions;
A-c, complete telltale mark(3)The paper substrates of setting(1)Through darkroom, under light source irradiates, it is arranged on light source opposite The base material anti-counterfeiting characteristic area amplified by micro- amplification composite shot of camera acquisition(4)Image, then passes through image procossing Device is analyzed to image, will show paper substrates on image(1)The position of existing natural hole is based on positioning mark Note(3)Summit is to carry out coordinate setting on the quadrantal diagram of initial point, only extracts coordinate diagram, and this coordinate diagram is stored in data center, As checking data A;
A-d, through data acquisition first semi-finished product enter random image setting process, in base material anti-counterfeiting characteristic area(4)Enterprising The spray printing of row random image, this spray printing position is with telltale mark(3)Summit be initial point coordinate system in can be in certain limit Interior random regulation is arranged, and meanwhile, the raw materials used quantity of each spray printing, spray printing angle are all adjusted within the specific limits at random Section, spray printing terminates, and is dried according to raw materials used middle moisture situation, and leaflet enters UV irradiation chamber afterwards, Under ultraviolet light source shines, in random image, the microgranule of distribution displays, and image collecting device is by the number of coordinates of Particle Distribution According to recording, and through software processes, abandon the microgranule within image, retain the microgranule number of coordinates of outer display image profile According to, and this data is stored in data center, as checking data B;
Checking data B of checking data A that A-e, step A-c are gathered and the collection of step A-d is with telltale mark(3) Summit overlapped for initial point, as checking data C;
B, the Qualify Phase of authenticity of products:
B-a, inquiry request object are arranged on this anti-counterfeit printed data verification in commodity packaging by mobile terminal recognition and enter Mouth labelling(2), as needed, mobile terminal can carry out the download of corresponding software and installation it is also possible in direct access data Corresponding data in the heart, in this process, is generated the flow process of unique code, carries out by the application of aforementioned management system, examination & verification Primary false proof it is ensured that the verity of link entrance;
B-b, mobile terminal are uploaded to data center by distinguishing result, according to request object after being compared by data center Type, will reach mobile terminal under the Query Result of the corresponding checking data comprising to pre-deposit;
It is right that anti-counterfeit printed on the checking data that data center is fed back by B-c, inquiry request object and product to be verified is carried out Ratio, according to the difference of request object, has checking data A+ product to be verified, checking data B+ product to be verified, checking data C+ Three kinds of verification modes of product to be verified, compare whether the coordinate points of the two coincide, concrete mode is respectively respectively:Checking data A + product to be verified, paper substrates anti-counterfeit printed from back side illuminaton using ordinary light source(1)In natural hole printing opacity be better than it Remaining part is divided, and whether the coordinate points of comparison checking data A are identical with the position of natural hole;Checking data B+ product to be verified, makes Anti-counterfeit printed with UV-device front illuminated, compare the microgranule profile that the displays coordinate whether with checking data B Position coincide;Checking data C+ product to be verified, is verified using above two mode successively.
2. method for anti-counterfeit according to claim 1 is it is characterised in that described mobile terminal carries out respective downloaded and installation Mode is that user opens any barcode scanning client downloads, links in enterprise web site download and the download of third-party application market Any one.
CN201410423829.2A 2014-08-27 2014-08-27 Anti-counterfeiting printed matter and corresponding anti-counterfeiting method Active CN104239928B (en)

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CN107194708A (en) * 2017-06-14 2017-09-22 上海美声服饰辅料有限公司 Method for anti-counterfeit and its system
CN108921217A (en) * 2018-06-29 2018-11-30 上海先幻新材料科技有限公司 A method of verifying mark authenticity
CN109272090B (en) * 2018-08-02 2021-07-23 北京三友恒瑞科技有限公司 Anti-counterfeiting two-dimensional code and optical modulation encryption method and production application system thereof
CN110428272B (en) * 2018-09-13 2020-11-27 拍拍看(海南)人工智能有限公司 Sawtooth micropore anti-counterfeiting method and printed matter

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