Research On Copyright Protection Of Network Manufacturing Products Based On Digital Watermarking Technology

With the rapid development of information technology, especially the internet, the information technology has injected new vigor into traditional manufacturing industry and manufacturing industry improves quickly. The dynamic alliance of enterprises, collaborative design in different places and the online electronic trade make the intellectual property right question from network manufacturing more prominent day by day. So, it is extremely important to study the copyright protection question in the network manufacturing field.Digital watermarking technology is an important technology in the field of information safety. This paper studies the application of digital watermarking technology in network manufacturing field by solving the copyright protection problem from network manufacturing products as the goal and copyright protection of the mechanical engineering picture as the center.In this paper we study relevant theoretical foundation and basic theories frame of digital watermarking, digital watermarking methods in spatial domain and varying domain; study and summarize the attack methods and countermeasures of the digital watermarking; Point out that it is very important to embed the digital watermark into vector picture discussing requisition for digital watermarking from mechanical engineering according to the characteristics of mechanical engineering picture. We study meaningful watermarking algorithm based on wavelet packet transform and spread spectrum technology. A network manufacturing products exchange platform is presented based on former digital watermarking technology and fair exchange protocol. This platform can basically meet the request of network manufacturing products exchange such as copyright protection, fairness, security, privacy, etc.