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(Computer World News
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Germany: A digital watermarking prevents falsification electronic photos from digital watermarking technology can effectively prevent the documents from being forged. Take a procedure for making an individual ID card, generally need to pass a photo scan, signature, affield input, print, and plastic seal. The above new technology is to attach a hidden digital watermark on the photo before printing the documents. The specific practice is to process the information that the person is unbeatable on the photo. The processed photo is exactly the same as the original photo, and the digital watermark must be detected with a special scanner. This method can determine the authenticity of the documents quickly and correctly. Germany has studied the technology of adding hidden tags in printing and printing paper media documents. This technique prints watermark information through the software in the computer and hidden in the documents, and the human eye is not aware of hidden tags from the surface. of. When the authenticity of the certificate is required, the authenticity is detected using a dedicated photoelectric detection device. At present, research institutes studying the technology are still developing another new system, and new systems can only be combined with firm digital watermarks, or they can make digital watermarks disappear, so that any fake attempt can't succeed. United States: Digimar, which produces digital watermarks and packaging, etc., produces digital watermarks, and the first commercial digital watermark software in the world, and then integrated into Adobe Photoshop and Corel DRAW image processing software in plug-in. Subsequently, Digimar has launched a series of digital watermark products, "Mediabridge" technology developed a new way to access the Internet, hidden in magazine advertising, product packaging, catalog, or even various types of notes Watermark, the user can bring the user directly to the network site associated with the content of the printed image, eliminates the process of tapping the keyboard and clicking the mouse to the user to tap the keyboard and click the mouse. . For example, the media bridge technology will immediately display the information of the advertising company's homepage and advertisements on the computer, exempt from the process of searching in online search on the computer. This approach enables publishers, advertisers, and image applicants to increase the added value of their products. "BRAND Protection" technology can be used to conduct product certifications in any link of the product flow chain by adding confidential features, and identify the original and copy version, preventing product forgery, and can be supplied Chain to track the circulation of the product. "Secure Document" technology adds Digimar's watermark features to important documents, to confirm the authenticity of the document, identify the original document and copy document, prevent unauthorized documentation from copying and confirming the original document. Authorized application, etc. In addition, in the printer, the digital watermark is used to increase control information to limit printing technology is being developed. The US Treasury has entered the Mural Science Institute Media Laboratory research to join the unique, invisible digital watermark in each image of the color printer, the copy machine output, judge the watermark from the scanning ticket from the scanning ticket in real time, quickly identify true Pseudo. The most famous is the PatchWork algorithm. This technique randomly selects N to pixels (AI, BJ) in the image. If the value of the AI pixel is increased, the BJ is reduced accordingly by 1. However, PatchWork technology has its own inherent limitations. First, the information embedded rate of PatchWork technology is very low, usually each map can only be embedded in a bit of watermarking information, which limits it only to apply to low water coding rates; second, this algorithm must be found The position of each pixel in the image is difficult to decode an image added to the watermark in the absence of an affine transformation. Despite the limitations of these applications, it is extremely difficult to remove digital watermarks without knowing the random digital water printing key, unless the visual quality of the image is destroyed.
Japan: Joining the Watermark IBM Tokyo Research Laboratory in the Insurance Notes Proposed Data Hidding as a solution to identify the source of digitized photos, confirming the integrity of digitized photos, determining if the photo is tampered with and positioning tamper. IBM Tokyo Research Laboratory combined with Yasuda Fire & Marine (YFM), a prototype of a safe archive and transmission system as a safety electronics insurance claim. In November 1998, YFM showed this system at the IBM Global Insurance Executive meeting held by Monte Carlo, which is one of the most exciting scenes in this meeting. The system can assist local service departments to carry out automobile loss claims, when the employee of the compament service department or the employee of the repair shop uses this safety digital camera and micro flash memory to take a photo, then use the safety image to file When recording these photos and transmission systems, the manager and accountant of the service department can check this photo and determine whether it is taken with the certified camera, whether there is any unauthorized changes. The safety electronic claim processing system can run in the Lotus Notes system, which identifies the source of digitized photos and confirming its integrity, and whether the registered photo is from the authenticated digital camera and whether it is tampered. The working process of the system is this: When the user takes a photo through a secure camera, the camera and safety micro flash memory is certified by the protocol. As long as the authentication is successful, the safety micro flash memory embeds a tag into each data segment of the JPEG compressed image. When the user is inserted into a personal computer into a personal computer, the photo archive and transmission system and the secure micro flash memory are certified by the protocol, and the system receives pictures from the micro flash memory and determines whether or not from the authenticated digital camera. The former is based on tamper-proof digital watermark, which is based on digital watermark detection. The system embeds both watermarks directly into the JPEG compressed image. During the authentication process, the system extracts photo authentication information and digitized signatures, and uses red markers to indicate the tamperful place. ALPVISION's digital watermarking technology Alpvision studied technology in its Labelit software, can hide several characters in any scanned pictures. These character marks can be used as proven by the original file, that is, any electronic picture, whether it is used for Word documents, publications, or email or web pages, can know its original origin by means of hidden tags. Therefore, it can be a powerful tool for copyright protection. This tag is hidden in the scanned picture, even if the format of the file is changed, or the picture is cut, confined, rotate, etc., the character tag will not disappear, and it is completely invisible! PhotoCheck software provides a simple and effective way to prevent documents from being forged. It is embedded in a specific picture, such as a user's photo, which can be in a BMP format or JPEG format, then print the image to the card. You can only determine the authenticity of the card when you use the scanner to get the image. The functionality of this product can also be expanded. For example, hidden information can be embedded to the magnetic stripe or integrated circuit chip of the card. The ALPVISION SAFEPAPER is a security product designed for printing documents. It hides the watermark information to the back of the paper to prove the authenticity of the document. It requires a document to be single-sided printing, print resolution is above 600DPI. When detecting, the 24bits scanner for SafePaper software and resolution is 600dpi. SafePaper can prove whether a document is printed for the designated company or organization, such as medical prescriptions, legal instruments, contracts, etc., can also hide some important or secret information, such as trademarks, patents, names, amounts, etc. Digital watermark. Signum trademark protection and anti-counterfeiting printed digital watermarking technology is increasing today, it is very important to maintain reputation. However, trading issues on counterfeit branded product trademarks are also very serious, according to data, its annual transaction amount can reach approximately 50 billion US dollars.
Since the fake is spent on the package of counterfeit goods, instead of considering how to improve the quality of the product, the packaging of protecting the product has become a must. A special version of Signum's Veridata software, called iPak, which adds invisible watermarks to the printable packaging and trademark to prevent trademark piracy. Veridata IPAK software can run in Windows 95/98 / ME / NT 4.0 / 2000, support TIFF-RGB, CMYK, and grayscale images. Its main feature is: ◆ Veridata IPAK can constantly update anti-counterfeiting information by minimizing images, and without increasing additional product costs; ◆ Veridata iPak and other offer maximum protected The security device is fully compatible; ◆ Veridata IPAK hidden digital watermarks can be detected by non-professional use; ◆ Veridata iPak can embed different digital watermarks in different packaging to provide security review tracking; ◆ Trademark ownership You can authorize to allow specific people to read hidden digital watermark information. Signum United Security Printing Industry has developed a special Veridata tool called ISEC, providing hidden security features for valuable or important documents to prevent forgery, piracy and unauthorized changes. Veridata ISEC tools can be used to protect large-scale security documents, including bank checks, passports, bonds, ID cards, plastic cards, stamps, drivers, certificates, bills, reports, and packaging. Veridata ISEC software uses advanced digital watermarking algorithms to embed unknowledgeable information in the picture, which can effectively prevent forged behavior. The unique concealed features of Signum technology are: concealment and irritability All data in embedded documents are invisible to people, and through Veridata software tools, it can be easily detected; machine readability Embedded data can be automatically processed by related computer devices; the number and type of embedded data can be specified by customers or agents, social insurance numbers, passport numbers, data periods, etc. Fully security is only authorized to allow SIGNUM security ID software to limit the key to a single user, so that watermark does not disclose the outside customer; easy to detect-authorized users can easily scan Documentation and any watermark hidden in the image completes the detection; any unauthorized change in the integrity to the image, no matter how small, it can be detected by a unique detection technology. my country's technical research in digital watermark printing and anti-counterfeiting fields is in my country, and the relevant department researchers are stepping up the research work of digital watermark printing and anti-counterfeiting technologies, such as Dalian University of Science and Technology has achieved effective research results in digital watermark printing security technology. This technology of Dachang University of Technology can be added to the printed image to add digital watermarks, and automatic detection of digital watermarks in the printed image can be completed by scanners and dedicated software. This technique is adapted to a variety of printers and scanners. Digital watermarks have opened up a new information security path, its unknownsicine and resistance to various attacks, can achieve integrity protection and tamper identification of digital products, and can also be used for digital security. Digital watermarks will be one of the core technical measures of copyright protection and authenticity certification of digital works, and an irreplaceable role in e-commerce transactions. Today, in the rapid development of the market economy, this is undoubtedly a good solution for the creation of corporate image and economic interests in business and digital product infringement. Digital watermarks and their application technologies not only provide breakthrough information security, and it takes an important position in digital anti-counterfeiting, which is a great benefit to maintaining national economic order.
