The Research Of The Printing Forgery Prevention Technology Based On Anti-attack Digital Watermark

Printing anti-counterfeiting technology can store digital products copyright information,in the damage and unauthorized dissemination can be used to extract the watermarkinformation to verify the digital product copyright information, integrity and securityprotection of copyright information. Compared to the traditional printing anti-counterfeitingtechnology dependent, the shortcomings of high manufacturing costs of equipment, digitalwatermarking technology is one of the important anti-counterfeit printing. Digitalwatermarking can be embedded product identification information in the digital works, hasbeen widely used in digital video, including printing and publishing, software program andother industries in the field of copyright authentication.Printing products may experience multiple scanning, binding, pasting and placed in theapplication process, wrinkle, prints, breakage and piecing together the phenomenon. When theprinting products by such image attacks, requires the application of anti-counterfeitingtechnology in printing products, extract the effective digital watermarking to protect thecopyright information. This paper begins from the printing anti-counterfeiting technology,system analysis and research of the digital watermark anti-counterfeiting technology inprinting principle, summarizes the shortcomings of traditional digital watermarking algorithmbased on chaos encrypted in the watermark embedding and watermark, on this basis, putforward a digital watermark printing anti-counterfeiting algorithm chaos encryption and basedon wavelet transform, which can effectively solve the the above problems. The concreteresearch contents are as follows.First, makes a deep research on the printing anti-counterfeiting technology, analyzes theprinciple of digital watermarking technology and the traditional algorithm, the traditionaldigital watermarking algorithm. The shortcomings of the encrypted in the watermarkembedding and watermark, and provide a theoretical basis for the following algorithmimprovement.Second, the digital watermarking technique based on wavelet transform, presents adigital watermark printing anti-counterfeiting algorithm based on wavelet transform. Thealgorithm of image scrambling pretreatment before embedding, can be very good to improve the security and concealment, the same embedding and extraction of watermark in wavelettheory thought of using multiresolution. Finally, through MATLAB simulation experimentsbased on digital watermark printing anti-counterfeiting algorithm of wavelet transform in theimperceptibility case, has good robustness to JPEG compression and noise image printingcommon operations.Third, in view of the above algorithm in scrambling processing deficiencies in theprocess, before being embedded in digital watermarking, digital watermarking of chaoticimages scrambling technology of digital watermarking wavelet transform coefficients areencrypted, by choosing different chaotic mapping of the K value and the scrambling imagesize will be the integration of cryptography and digital watermarking technology use,effectively resist various attacks.