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Is laser anti-counterfeiting a blockchain concept
Publish: 2021-04-23 14:04:08
1.
- yinlian answer:
blockchain can realize the traceability and non tampering of data, because it is based on the distributed database established by cryptographic links, thus forming non tamperable data sources. Therefore, in the whole process of procts from proction to circulation, complete information records can be achieved, and comprehensive data information can be provided for regulatory authorities, so that they can more efficiently complete proct quality inspection and data interconnection and sharing. In this process, blockchain can solve four problems:
first, information can not be tampered, consensus can be reached and trust can be built. In the network node composed of each participant, data records are formed in the business process, and the information of proct logistics, warehousing and proction, including raw material source, processing and assembly, is stored in the blockchain network to provide data information of each link for regulatory departments, cooperative enterprises or institutions
Second, the process is open and transparent. In the process of business process, the proct's anti-counterfeiting and circulation can be realized by implanting an identification chip into the proct and registering it on the blockchain, so that it can have a digital identity, and then record all the information of the digital identity, such as source and flow, through the account book maintained jointly, so as to achieve the verification effect Third, save cost and improve efficiency. Under the condition of confidentiality, the data records on the blockchain are stored, transmitted, verified and analyzed by the regulatory department, and transferred among different departments, so as to achieve unified voucher, whole process record and enterprise credit reference, which can effectively solve the problems of multi-party participation, information fragmentation and repeated audit in circulation Fourthly, information sharing. The circulation of enterprise proct certification depends on the interconnection of public data resources among departments and institutions such as commerce, customs, quality inspection, instry and commerce, banking, etc. under the review environment of blockchain construction, all departments can obtain information synchronously, establish credit evaluation mechanism based on supply chain, and organically connect various supply chain platforms, so as to improve the credit rating, credit record, risk warning, risk management, etc Information disclosure and sharing of illegal and dishonest behaviorthe disadvantages of traditional anti-counterfeiting traceability are very obvious, and anti-counterfeiting traceability has always been an important scenario in blockchain application, such as yinlian, which also starts from the anti-counterfeiting traceability scenario, hoping to build a commercial blockchain
compared with the traditional centralized anti-counterfeiting Traceability Technology, yinlian uses the underlying technology of blockchain, and the merchants proce their own anti-counterfeiting codes to remove the trust problem of cheating by the intermediate anti-counterfeiting merchants. The main process is as follows:
2. They will record proction information, logistics information, sales information and other data on the chain. It's equivalent to a person who has an ID card, but the ID card is a code. When you go in, you can see complete information. Family name, even "parents" can know, but also can't change! With this kind of blockchain for anti-counterfeiting traceability, even the labor cost of playing Jia is saved.
3. Compared with the past, various anti-counterfeiting technologies have been adopted in commodity traceability, but the results are not satisfactory. Using the traceability of blockchain technology, through the deep combination of logistics management, commodity anti-counterfeiting, commodity traceability, manufacturing management, instry collaboration and other fields, the traceability and security of commodities are increased. Cipher finance mimacaijing focuses on blockchain information.
4. Hello, there is no problem with anti-counterfeiting. What procts do you sell? However, few companies have mastered the blockchain technology, which tends to be more conceptual. The price of real blockchain anti-counterfeiting traceability is also very high, ranging from hundreds of thousands to millions. I hope you can distinguish well. Don't spend a lot of money on ordinary traceability system, If you have common traceability needs, you can find Chinese anti-counterfeiting
5. The two have different meanings
the purpose of proct anti-counterfeiting is to identify the authenticity of goods and prevent counterfeiting. And proct traceability is to use blockchain technology to check the source information of goods. Cryptography focuses on blockchain information.
the purpose of proct anti-counterfeiting is to identify the authenticity of goods and prevent counterfeiting. And proct traceability is to use blockchain technology to check the source information of goods. Cryptography focuses on blockchain information.
6. The advantage of blockchain lies in its traceability, that is to say, a dish has a proct, which can be found when there is a problem. For anti-counterfeiting is of great significance.
7. Laser anti-counterfeiting technology
laser anti-counterfeiting technology includes laser hologram anti-counterfeiting label, encrypted laser hologram anti-counterfeiting label and laser holographic lithography anti-counterfeiting technology< The first generation of laser anti-counterfeiting technology is laser molded hologram anti-counterfeiting logo
holography was discovered by m.j.buerger, an American scientist, when he used X-ray to take pictures of the atomic structure of crystals. Together with d.gaber, he established the theory of holography: by using the principle of double beam interference, the object light and another light beam (reference beam) which is coherent with the object light can proce an interference pattern, and then the phase can be separated; Merge & quot; So that the phase and amplitude can be recorded simultaneously with the photographic film, and the hologram can be obtained. However, holography is based on the principle of interferometry, and must be recorded with high-density (resolution) photographic film. Due to the poor monochromaticity and coherence of ordinary light source, the development of holographic technology is slow, and it is difficult to take a decent hologram. Until the early 1960s, laser appeared, its high brightness, high monochromaticity and high coherence characteristics, rapidly promoted the development of holographic technology, many kinds of holograms were proced, holographic theory has been well verified, but e to the special requirements of shooting and reproction, from the date of birth, it has been almost confined to the laboratory< In the late 1970s, it was found that holograms have a surface structure including three-dimensional information (i.e. crisscross interference fringes), which can be transferred to high-density photographic film and other materials. In 1980, American scientists successfully printed the world's first molded hologram by transferring the holographic surface structure to the polyester film by using the embossing holographic technology. This kind of laser hologram is also called rainbow hologram. It is made on the plastic film by laser plate making, which proces colorful diffraction effect and makes the image have two-dimensional, three-dimensional and three-dimensional characteristics Three dimensional sense of space, in ordinary light, hidden images, information will reproce. When the light is illuminated from a certain angle, a new image will appear. This kind of embossed hologram can be reproced as quickly as printing, with low cost, and can be combined with all kinds of printed procts. So far, holography has taken a decisive step towards social application
at that time, the proction technology of the embossed hologram was very advanced and only a few people mastered it, so it was used as an anti-counterfeiting mark. The principle of anti-counterfeiting is:
1. In the whole process of laser hologram shooting, if there is a different condition (such as the condition of rainbow hologram shooting), the effect of holographic logo will be different< The holographic information of this kind of hologram can not be photographed by ordinary photography, so it is difficult to the holographic pattern
the first one to use holograms as anti-counterfeiting labels is Johnny Walker whishy (a kind of whisky). When it was applied in Thailand, it was said that sales increased by about 45%
the laser embossing holographic anti-counterfeiting technology was introced into China in the late 1980s and early 1990s, especially from 1990 to 1994. More than 100 proction lines were introced from all over the country, accounting for more than half of the world's manufacturers at that time. At the beginning of the introction, this anti-counterfeiting technology did play a certain role in anti-counterfeiting, but with the passage of time, the laser hologram proction technology spread rapidly, and now it has been broken by counterfeiters from all aspects, almost completely losing the ability of anti-counterfeiting<
Technical Review
laser anti-counterfeiting logo has the following congenital defects when it is proced:
1. It only depends on the confidentiality and control of proction technology to prevent counterfeiting
2. It belongs to the simple observation anti-counterfeiting technology. The main observation point is to see whether it is a hologram, and the second is to see whether the pattern conforms to the published pattern. However, ordinary consumers can distinguish two different versions of the hologram only when they compare them carefully
3. There is no technical method to prevent the anti-counterfeiting logo from being reused
4. There is no technical method to prevent the package with anti-counterfeiting label from being reused
5. There is no technical method to prevent counterfeiters from obtaining anti-counterfeiting marks by means of bribery
Second, the improved laser holographic anti-counterfeiting logo
because the first generation of laser holographic anti-counterfeiting logo has completely lost its anti-counterfeiting function, people have to start to improve it. There are three ways to improve: the first is to use computer technology to improve the hologram, the second is to develop a transparent laser hologram anti-counterfeiting logo, and the third is the reflection laser hologram anti-counterfeiting logo
2.1 improvement of computer image processing technology
the improvement of laser hologram by computer image processing technology has gone through two stages of development. The first stage is computer synthetic hologram technology, which is a series of ordinary two-dimensional images are optically imaged and processed according to the principle of hologram, When we observe this kind of pixel hologram, we can see different three-dimensional images from different perspectives. Its graphics and colors have extremely flexible dynamic effects, and are not limited by the direction of the reconstructed light. The second stage is the computer-controlled direct exposure technology, which is different from ordinary holographic imaging. This technology does not need the shooting object, and the required graphics are completely generated by the computer. Through the computer controlling two coherent beams to generate all the patterns point by point, the angle between the two beams can be changed for different points, so as to make a three-dimensional hologram with special effect<
2.2 anti counterfeiting technology of transparent laser hologram, Such a laser rainbow embossed hologram is opaque. In fact, the improvement of transparent laser hologram is to cancel the aluminum coating, and the hologram is directly molded on the transparent polyester film. In 1996, the Ministry of public security of China decided to apply the transparent laser rainbow embossed hologram to the ID card. The ID card is completely covered and sealed by the transparent film. When the front of the ID card is viewed in light, not only the ID card can be seen clearly, but also the two-dimensional and three-dimensional rainbow hologram (the great wall and Chinese characters in both Chinese and English) reproced on the transparent film can be seen
2.3 anti counterfeiting technology of reflected laser hologram, After the medium negative is processed, a multi-layer translucent reflecting surface is formed inside the medium (for example, there can be more than 20 reflecting surfaces in a 6 micron thick emulsion layer). The reconstruction process of hologram is to irradiate the hologram with a white light point source, and the multi-layer translucent reflecting surface generated in the medium reflects the light back. Facing the reflected light, you can see the virtual image of the original object, so it is called reflection hologram
Technical Review
these improvements of laser anti-counterfeiting technology do not and are unlikely to extend the life cycle of laser hologram anti-counterfeiting technology, because these improvements only increase the difficulty of image manufacturing to varying degrees, and can not improve even one of the inherent defects of laser hologram anti-counterfeiting, and the original problems still exist< Third, encryption hologram anti-counterfeiting technology
the encrypted hologram uses optical image coding encryption technology such as random phase encoding image encryption, moire encoding image encryption and laser speckle image encryption to encrypt the anti-counterfeiting image and obtain invisible or some speckle encrypted image. The image encrypted by random phase coding is invisible. Only the special photoelectric decoder can display the original image, which is not suitable for general commodities. At present, it is mainly used for anti-counterfeiting of various cards. The original image can be displayed only when the image encrypted by Moire code and laser speckle is overlapped with the decoded grating or the decoded speckle, which can be used for general merchandise anti-counterfeiting
the principle of encrypted image anti-counterfeiting is that the encrypted image is invisible or noisy, and it is difficult to decipher without a key, so it has a certain anti-counterfeiting function
Technology Review
in fact, these technologies are originally image encryption technologies, so it is very difficult to use them for anti-counterfeiting. The first is the image encrypted by random phase coding. Although it needs special instruments to display it, what is the difficulty in today's high-tech and international counterfeiting? Why is it difficult to decipher? As for the image encrypted by Moire code and laser speckle, it is easier to imitate, because consumers get not only the anti-counterfeiting logo containing the encrypted image, but also the decoding grating or decoding speckle used to verify the authenticity together with the purchased goods. Thus, image encryption has not played any role in anti-counterfeiting at all, The anti-counterfeiting of this kind of anti-counterfeiting label completely depends on the difficulty of mastering the manufacturing technology of encrypted image, but mastering this technology is not very difficult.
4. Laser holographic lithography anti-counterfeiting technology
laser holographic lithography anti-counterfeiting technology is also known as laser coding technology, also known as laser & quot; Shaozi & quot; Technology. Due to the high cost of laser coder, it is not widely used, only used in mass proction or other printing methods can not achieve the occasion. Because of this, it plays a role in anti-counterfeiting packaging. Laser code sealing technology is a good anti-counterfeiting technology. After the proct is filled and sealed, laser printing is carried out at the joint between the cover and the container, so that the upper part of the font is printed on the cover and the lower part is printed on the container. The anti-counterfeiting function of this technology is as follows:
(1) the packaging container cannot be reused. The new cover matches the old container and the handwriting is difficult to align
(2) the laser is expensive and can be coded and printed on the proction line. It is difficult for counterfeiters to invest a large amount of money to buy this equipment.
(3) the printing template can be changed at will by the manufacturer, and different templates can be used on different dates. Only a few people know the details of the replacement, which is difficult for outsiders to crack
from the perspective of anti-counterfeiting effect, laser coding technology is even better than laser holography technology. The laser holographic logo is printed by the printing factory, and the manufacturer using the logo can not ensure that the master does not flow out from the printing link or illegally. For counterfeiters, laser holographic logo can be purchased directly in batches without equipment investment or mastering the technology. Using laser coding technology for anti-counterfeiting, the first problem faced by counterfeiters is expensive equipment investment. The price of laser coder is expensive, and it must be used online. In addition, the replacement of glyph template and the secrecy of variant make it difficult for those scattered small and medium-sized factories to proce fake procts. For these reasons, the life of the package with laser coding technology is longer than that with laser holographic identification< Although the anti-counterfeiting effect of laser holographic lithography is better than some anti-counterfeiting marks, it also has the following disadvantages:
1
laser anti-counterfeiting technology includes laser hologram anti-counterfeiting label, encrypted laser hologram anti-counterfeiting label and laser holographic lithography anti-counterfeiting technology< The first generation of laser anti-counterfeiting technology is laser molded hologram anti-counterfeiting logo
holography was discovered by m.j.buerger, an American scientist, when he used X-ray to take pictures of the atomic structure of crystals. Together with d.gaber, he established the theory of holography: by using the principle of double beam interference, the object light and another light beam (reference beam) which is coherent with the object light can proce an interference pattern, and then the phase can be separated; Merge & quot; So that the phase and amplitude can be recorded simultaneously with the photographic film, and the hologram can be obtained. However, holography is based on the principle of interferometry, and must be recorded with high-density (resolution) photographic film. Due to the poor monochromaticity and coherence of ordinary light source, the development of holographic technology is slow, and it is difficult to take a decent hologram. Until the early 1960s, laser appeared, its high brightness, high monochromaticity and high coherence characteristics, rapidly promoted the development of holographic technology, many kinds of holograms were proced, holographic theory has been well verified, but e to the special requirements of shooting and reproction, from the date of birth, it has been almost confined to the laboratory< In the late 1970s, it was found that holograms have a surface structure including three-dimensional information (i.e. crisscross interference fringes), which can be transferred to high-density photographic film and other materials. In 1980, American scientists successfully printed the world's first molded hologram by transferring the holographic surface structure to the polyester film by using the embossing holographic technology. This kind of laser hologram is also called rainbow hologram. It is made on the plastic film by laser plate making, which proces colorful diffraction effect and makes the image have two-dimensional, three-dimensional and three-dimensional characteristics Three dimensional sense of space, in ordinary light, hidden images, information will reproce. When the light is illuminated from a certain angle, a new image will appear. This kind of embossed hologram can be reproced as quickly as printing, with low cost, and can be combined with all kinds of printed procts. So far, holography has taken a decisive step towards social application
at that time, the proction technology of the embossed hologram was very advanced and only a few people mastered it, so it was used as an anti-counterfeiting mark. The principle of anti-counterfeiting is:
1. In the whole process of laser hologram shooting, if there is a different condition (such as the condition of rainbow hologram shooting), the effect of holographic logo will be different< The holographic information of this kind of hologram can not be photographed by ordinary photography, so it is difficult to the holographic pattern
the first one to use holograms as anti-counterfeiting labels is Johnny Walker whishy (a kind of whisky). When it was applied in Thailand, it was said that sales increased by about 45%
the laser embossing holographic anti-counterfeiting technology was introced into China in the late 1980s and early 1990s, especially from 1990 to 1994. More than 100 proction lines were introced from all over the country, accounting for more than half of the world's manufacturers at that time. At the beginning of the introction, this anti-counterfeiting technology did play a certain role in anti-counterfeiting, but with the passage of time, the laser hologram proction technology spread rapidly, and now it has been broken by counterfeiters from all aspects, almost completely losing the ability of anti-counterfeiting<
Technical Review
laser anti-counterfeiting logo has the following congenital defects when it is proced:
1. It only depends on the confidentiality and control of proction technology to prevent counterfeiting
2. It belongs to the simple observation anti-counterfeiting technology. The main observation point is to see whether it is a hologram, and the second is to see whether the pattern conforms to the published pattern. However, ordinary consumers can distinguish two different versions of the hologram only when they compare them carefully
3. There is no technical method to prevent the anti-counterfeiting logo from being reused
4. There is no technical method to prevent the package with anti-counterfeiting label from being reused
5. There is no technical method to prevent counterfeiters from obtaining anti-counterfeiting marks by means of bribery
Second, the improved laser holographic anti-counterfeiting logo
because the first generation of laser holographic anti-counterfeiting logo has completely lost its anti-counterfeiting function, people have to start to improve it. There are three ways to improve: the first is to use computer technology to improve the hologram, the second is to develop a transparent laser hologram anti-counterfeiting logo, and the third is the reflection laser hologram anti-counterfeiting logo
2.1 improvement of computer image processing technology
the improvement of laser hologram by computer image processing technology has gone through two stages of development. The first stage is computer synthetic hologram technology, which is a series of ordinary two-dimensional images are optically imaged and processed according to the principle of hologram, When we observe this kind of pixel hologram, we can see different three-dimensional images from different perspectives. Its graphics and colors have extremely flexible dynamic effects, and are not limited by the direction of the reconstructed light. The second stage is the computer-controlled direct exposure technology, which is different from ordinary holographic imaging. This technology does not need the shooting object, and the required graphics are completely generated by the computer. Through the computer controlling two coherent beams to generate all the patterns point by point, the angle between the two beams can be changed for different points, so as to make a three-dimensional hologram with special effect<
2.2 anti counterfeiting technology of transparent laser hologram, Such a laser rainbow embossed hologram is opaque. In fact, the improvement of transparent laser hologram is to cancel the aluminum coating, and the hologram is directly molded on the transparent polyester film. In 1996, the Ministry of public security of China decided to apply the transparent laser rainbow embossed hologram to the ID card. The ID card is completely covered and sealed by the transparent film. When the front of the ID card is viewed in light, not only the ID card can be seen clearly, but also the two-dimensional and three-dimensional rainbow hologram (the great wall and Chinese characters in both Chinese and English) reproced on the transparent film can be seen
2.3 anti counterfeiting technology of reflected laser hologram, After the medium negative is processed, a multi-layer translucent reflecting surface is formed inside the medium (for example, there can be more than 20 reflecting surfaces in a 6 micron thick emulsion layer). The reconstruction process of hologram is to irradiate the hologram with a white light point source, and the multi-layer translucent reflecting surface generated in the medium reflects the light back. Facing the reflected light, you can see the virtual image of the original object, so it is called reflection hologram
Technical Review
these improvements of laser anti-counterfeiting technology do not and are unlikely to extend the life cycle of laser hologram anti-counterfeiting technology, because these improvements only increase the difficulty of image manufacturing to varying degrees, and can not improve even one of the inherent defects of laser hologram anti-counterfeiting, and the original problems still exist< Third, encryption hologram anti-counterfeiting technology
the encrypted hologram uses optical image coding encryption technology such as random phase encoding image encryption, moire encoding image encryption and laser speckle image encryption to encrypt the anti-counterfeiting image and obtain invisible or some speckle encrypted image. The image encrypted by random phase coding is invisible. Only the special photoelectric decoder can display the original image, which is not suitable for general commodities. At present, it is mainly used for anti-counterfeiting of various cards. The original image can be displayed only when the image encrypted by Moire code and laser speckle is overlapped with the decoded grating or the decoded speckle, which can be used for general merchandise anti-counterfeiting
the principle of encrypted image anti-counterfeiting is that the encrypted image is invisible or noisy, and it is difficult to decipher without a key, so it has a certain anti-counterfeiting function
Technology Review
in fact, these technologies are originally image encryption technologies, so it is very difficult to use them for anti-counterfeiting. The first is the image encrypted by random phase coding. Although it needs special instruments to display it, what is the difficulty in today's high-tech and international counterfeiting? Why is it difficult to decipher? As for the image encrypted by Moire code and laser speckle, it is easier to imitate, because consumers get not only the anti-counterfeiting logo containing the encrypted image, but also the decoding grating or decoding speckle used to verify the authenticity together with the purchased goods. Thus, image encryption has not played any role in anti-counterfeiting at all, The anti-counterfeiting of this kind of anti-counterfeiting label completely depends on the difficulty of mastering the manufacturing technology of encrypted image, but mastering this technology is not very difficult.
4. Laser holographic lithography anti-counterfeiting technology
laser holographic lithography anti-counterfeiting technology is also known as laser coding technology, also known as laser & quot; Shaozi & quot; Technology. Due to the high cost of laser coder, it is not widely used, only used in mass proction or other printing methods can not achieve the occasion. Because of this, it plays a role in anti-counterfeiting packaging. Laser code sealing technology is a good anti-counterfeiting technology. After the proct is filled and sealed, laser printing is carried out at the joint between the cover and the container, so that the upper part of the font is printed on the cover and the lower part is printed on the container. The anti-counterfeiting function of this technology is as follows:
(1) the packaging container cannot be reused. The new cover matches the old container and the handwriting is difficult to align
(2) the laser is expensive and can be coded and printed on the proction line. It is difficult for counterfeiters to invest a large amount of money to buy this equipment.
(3) the printing template can be changed at will by the manufacturer, and different templates can be used on different dates. Only a few people know the details of the replacement, which is difficult for outsiders to crack
from the perspective of anti-counterfeiting effect, laser coding technology is even better than laser holography technology. The laser holographic logo is printed by the printing factory, and the manufacturer using the logo can not ensure that the master does not flow out from the printing link or illegally. For counterfeiters, laser holographic logo can be purchased directly in batches without equipment investment or mastering the technology. Using laser coding technology for anti-counterfeiting, the first problem faced by counterfeiters is expensive equipment investment. The price of laser coder is expensive, and it must be used online. In addition, the replacement of glyph template and the secrecy of variant make it difficult for those scattered small and medium-sized factories to proce fake procts. For these reasons, the life of the package with laser coding technology is longer than that with laser holographic identification< Although the anti-counterfeiting effect of laser holographic lithography is better than some anti-counterfeiting marks, it also has the following disadvantages:
1
8. Laser anti-counterfeiting label, also known as holographic anti-counterfeiting label, is an anti-counterfeiting label made by laser color hologram plate making technology and molding technology. The plate making technologies that can be realized include: dot matrix dynamic light, disposable special laser film, 3D optical micro background, colorful optical random interference, Chinese and English characters, etc. You want to do anti-counterfeiting label, Dongyu anti-counterfeiting very professional can try
9. You can also do it yourself: the film used for the master film of laser hologram is the original glass negative of gelatin weighted chromate, that is, the gel weighted chromate (potassium dichromate, etc.), and then find a three-dimensional thing (such as a small ceramic toy --- a ceramic bird the size of a thumb, etc.), and then use a laser source, Shine on a light splitter (semi transparent mirror), and then reflect the two beams of light on the ceramic toy with the mirror. When you are ready, turn off the light and put the dichromate glass film in front of the ceramic toy. After a period of exposure, the developed dichromate glass film is a laser hologram, which is three-dimensional. In this way, we can make laser anti-counterfeiting marks. Finally, transfer the dichromate glass negative to the mark bearing object you said.
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