A brief analysis of digital watermarking opens up

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A brief analysis of digital watermarking has opened up a new way of information security

in today's fair market competition, there will always be some fake and shoddy products as a stumbling block, which is hated by consumers and commodity genuine enterprises. The emergence of anti-counterfeiting signs has greatly reduced the emergence of these fake and shoddy products, but with the progress of technology, some imitation is becoming easier and easier, Therefore, the development and production of anti-counterfeiting signs have to continue. In recent years, the latest information hiding technology digital watermarking has been developed internationally. Just like in life, in order to identify the authenticity of paper money, people usually point the paper money at the light source, and they will find that there is clear image information in the real paper money. This is the watermark we are familiar with

digital watermarking technology is to embed copyright information such as numbers, serial numbers, text and image marks into multimedia data, extract hidden watermark information through the detection and analysis of digital files, and use these watermark information to prove the creator's ownership of his works, and as the evidence to identify the authenticity of products and prosecute illegal infringement, Digital watermarking has become an effective means to protect intellectual property rights and digital multimedia anti-counterfeiting. Watermark technology is used in important printed materials such as banknotes, checks, certificates, passports, invoices, self-adhesive label printing, etc. because watermark has its unique properties: first, watermark is an almost invisible mark, which must be placed in a specific environment to be seen, without affecting the use of items; Second, the production and reproduction of watermarks are complex, requiring special processes and materials, and the watermarks on printed matter are difficult to be removed. For a long time, an important means to determine the authenticity of printed matter is to test whether it contains watermarks

digital watermarking is an information security technology developed in recent years. At present, Shanghai printing factory has not formed a complete theory. Digital watermarking generally includes two main processes: embedding and detection. In order to make it more difficult for attackers to remove and destroy the watermark, most of the current digital watermarking schemes use encryption technology when embedding and detecting. Only those who master the key can detect and discuss the role of material pulling machine and the future development direction to remove the watermark. Digital watermarking also has important application value in authenticity identification, covert communication, symbol concealment, electronic identity authentication and so on. The research of digital watermarking technology involves the research fields of many disciplines, such as Informatics, cryptography, mathematics, computer science, pattern recognition and so on, which makes the hidden information more hidden, secure, symmetrical and correctable

with the advent of the digital age, the multimedia digital world is rich and colorful, and digital products affect almost everyone's daily life. How to protect these digital products that are closely related to us, such as copyright protection, information security, data authentication and access control, has become increasingly important and urgent. Using the meaning and function of ordinary watermarking for reference, people adopt similar concepts to protect multimedia data such as digital image and digital music, so the concept of digital watermarking comes into being. The so-called digital watermarking is some digital information added to multimedia data, such as the information of the photographer will be added to the digital photos, the information of the advertising company will be added to the digital DVDs, and so on. Similar to the characteristics of ordinary watermarks, digital watermarks are almost invisible in multimedia data (such as digital photos), and it is difficult to be broken by events such as heavyweight summits, policy and regulation briefings, new technology and new product launches, procurement and supply docking conferences held at the same time. Therefore, digital watermarking has great potential in today's computer and Internet labor-intensive era

digital watermarking has become an effective means to solve copyright problems. Digital watermarking can be used to describe the data of digital products being copied, so as to control the data being copied or limit the number of copies, so as to achieve protection. For example, the secret digital watermark information in the CD data disk can conditionally control what kind of people can access the contents of the CD disk. In this way, the copyright of multimedia data can be protected by tracking the digital watermark information in multimedia data, which could not be achieved many years ago

digital watermarking technology is also of great use in the authenticity authentication of packaged printed materials, such as red headed documents issued by government departments. The traditional method of document authentication is to identify whether the paper, seal or steel seal of documents comply with specifications and standards. The disadvantage is that whether the paper, seal or steel seal is easy to be forged. In particular, seals, although government departments have strict regulations on the management and production of seals, there is still a saying in society that one radish engraves one seal. This shows that the traditional method has a very imperfect place. Using digital watermarking technology can effectively solve this problem. Taking the digital watermark as the information carrier and adding some information to the red headed document, the document not only has a seal or steel seal, but also has imperceptible digital watermark information, which greatly increases the difficulty of document forgery

we can see that digital watermarking has opened up a new way of information security. Its imperceptible concealment and the ability to resist various attacks can realize the integrity protection and tamper identification of digital products, and can also be used for digital anti-counterfeiting. Digital watermarking will become one of the core technical measures for copyright protection and authenticity authentication of digital works, and play an irreplaceable role in e-commerce transactions, which also indicates that digital watermarking has a huge and broad market application prospect. The functional characteristics and operating steps of the drop hammer impact tester

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