"paper fingerprint" anti-counterfeiting security printing technology
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Product fraud is becoming a serious problem more and more: whether it is a manufacturer of brand-name goods or a manufacturer of anti-counterfeit packaging in the printing industry, they have not yet fully understood the large number of fraud methods that flood the market. Users and technical consultants in the printing industry need to provide their customers with a large number of anti-counterfeiting methods, but they often feel powerless. Because this not only weighs the technical standards, but also the economic costs.
The complexity of anti-counterfeiting technology
Anti-counterfeiting signs must constantly combine new content so that they always outperform the counterfeiters. But this means not only the development of anti-counterfeiting technology, but also the difficulty of decoding. For this reason, very special instruments are often needed to decipher the anti-counterfeiting mark: for example, a magnifying glass or a laser pointer with a precisely specified wavelength. People are constantly improving the technical complexity of this combination of anti-counterfeiting marks, but also must be able to use the detectors everywhere. However, how does this check for customs officers who have only a short time and limited means to inspect the goods? Many security signs are visually appealing; but they must also be easy to sell and apply.
Cost problem
The second problem faced by many folding carton printers is the high cost pressure: some anti-counterfeiting measures for high-end products are gradually being replaced by other measures due to the use of expensive special inks or costly surface finishes. Of course, this not only takes into account the cost of the particular material, but also the cost of the process involved: the additional printing unit, the purchase of the detector, the cost of verification and contact for the counterfeit sign, and more. However, more and more low-value items are being counterfeited, resulting in huge losses: for example, a fake small bearing is much less accurate than genuine ones, which can make large production machines useless.
Protected by design
The anti-counterfeiting logo of the directional design is more and more important: the anti-counterfeiting mark is integrated into the printed data before printing, and then printed simultaneously with the color printing. To this end, Manroland Press Manufacturing has plans to work with different companies and will introduce exemplary solutions in practical applications. The advantage of the directional design approach is that no additional process costs are incurred after the encoded data is produced at one time.
In addition to the verification method, it is often necessary to track the way the product arrives at the customer. For example, tracking by a corresponding identification mark or continuous code, and a folding carton made for branded goods requires a single encoding. However, such identification marks do not achieve acceptable print quality during high speed printing. Coding and other identification marks also have shortcomings and cost issues. So, how to ensure tracking and re-tracking in order to avoid the purchase of fake and gray market purchases?
A new anti-counterfeiting measure that is currently being vigorously promoted is to use a random mark of the substrate to identify the printed product according to the "paper fingerprint": the individual paper fibers are randomly distributed with each other during papermaking, and thus a contour is formed by the mutually overlapping fibers. This profile is absolutely different at a certain location due to the large number of fibers and the messy generation process on the microscopic plane, and has a very high probability. Optical inspection, encoding, and preservation can be performed as long as each sheet has a separate microstructure. Therefore, the paper structure is used as a mark for identifying the substrate, which is effective for anti-counterfeiting.
"paper fingerprint"
This method of identifying printed products is not new: it was patented in the 1980s and 1990s. But this technology has not been properly applied widely. Since the paper structure is susceptible to dirt and wear, the paper fingerprinting method is often despised in practice compared to other methods; there is almost no corresponding inexpensive reader available for use, which is a defect in reliability identification. . As for how the scanner or scanning laser can reliably identify whether the paper structure is damaged? The inventor is still studying this problem and solution.
S2i technology
At the Hanover Fair in 2004, the research team at the University of Mannheim used its S2i (Security2image) demonstration structure as a pioneer in the continued development of paper fingerprinting methods. The basic innovation of S2i technology is to strengthen the paper fingerprint by means of the printing process: the unique change of the printing ink on the paper structure can act as a symbol. Because ink acts as a catalyst for paper fingerprints, it establishes the basis for an inexpensive method of indirectly detecting paper fingerprints. Currently, S2i technology is undergoing different field trials and trial applications, which can be identified using a platform scanner available in every office.
Cheap and safe
Making S2i logos is cheap – small codes can be printed on the press and can be decoded using commercially available scanners. In addition, this method provides a high degree of security against fraud because the S2i data is stored in the identification mark in digital form, so the digital password can be used in accordance with the Public Key System (PKS). PKS is considered to be more secure and reliable than analog methods.
PKS (Public Key System) specifies the use of a pair of passwords: data that uses one of the two passwords to compose a password can only be decoded using another password. Although it is possible in principle to decipher such a password, it is almost impossible for the counterfeiter to know not only the password but also the secret location of the paper structure, because it is not worth the effort. Go to fake.
S2i-fingerprint printing
In addition, the S2i method has a strong ability to prevent fingerprint wear and paper dust: print-based coding has a high data density, and data can be repeatedly stored multiple times. Defects are safely identified during decoding and the areas involved in analyzing paper and printed structures are eliminated. This high degree of reliability is a major advantage compared to methods based solely on the analysis of paper structures. It is well known that folding cartons are subjected to a variety of loads during loading, transport and storage, and the S2i method is used to ensure that such damage is recognized. To this end, the German Ministry of Education and Research (BMBF) expert committee gave a high evaluation of the new generation of S2i technology for paper fingerprinting, and accepted the submitted project draft under a large number of innovative proposals. In 2008, it is planned to launch a project under the name “O-Pur”.
"O-PUR" project
The research of new testing instruments and the identification of existing products with new technologies and software will continue to be the project of the German Ministry of Education and Research, and has begun to check the use of digital cameras in mobile phones. With the fact that 100% of the market coverage and the number of mobile phones with camera functions in Germany are still growing, people can easily use the mobile phone as the identification medium.
Manroland is also a temporary organization member of the German Ministry of Education and Research (BMBF) planning project. In order to quickly detect images and encode on production machines, in printing and finishing, they are currently working on another option for this project. They tested the fingerprinting and coding of paper fingerprints on their own printing presses: first, offset printing, but also all other printing methods. Faced with high-speed production, this is undoubtedly a challenge for image analysis. However, the theoretical model of the project has already been implemented, and it should be implemented and tested within the scope of the project of the Ministry of Education and Research. In addition, S2i coding should also be tested on other materials. In this respect, the personality of the ink and the substrate interact to provide a personalized image that can be recognized.
Nowadays, the cost of high-efficiency anti-counterfeit parts has been less than 1 Euro cent and can be applied to the bulk market. The goal of this program is to be as widely used as possible in many ways. Although S2i technology has not been integrated into high-speed production machines, it is already available to interested parties: for example, document security and anti-counterfeiting in digital printing.