Research On High Density 2-Dimensional Symbol And Watermarking Technology

In the age of information, with the rapid development and wide application of network and multimedia technology, more and more information are being transmitted through the network quickly and conveniently, which at the same time bring the potential problems of information security. Therefore, the way to keep the information safety has become a hot topic all over the world. The cryptography, which aims at the security of information, has become one of the most important research fields in information science and technology. Up to now, data encryption technology is the best method to achieve information security; it is a key technology that needs to be developed practically and urgently. In this paper, the author mainly did some research on the high-density 2-dimensional symbol and watermarking technology based on chaos theory. Then designed a static encryption system according to the cipher list based on the discrete chaotic system. Chaotic system has many strong points, such as randomicity, control parameter, ergodicity and the sensitivity to the initial condition, so that one can get stochastic number arrays and the encryption system can be of great security. Then syncretize the technology with others. (1) Developed the high-density 2D symbol based on the chaotic lists. It has a great memory capacity, and the information-hiding framework is good. (2) Combined the chaotic system with the watermarking technology, and put forward a new way to create watermarking, which build up the security of information. We can embed the chaotic lists directly as watermarking signals, and take the chaotic mapping model and the initial parameter as key.