A Novel Watermarking Technology Based on Lorenz Chaotic Attractor

The Lorenz chaotic system is creatively used to encrypt digital images in this paper. An initial data is chosen for the Lorenz chaotic system, and then an encrypted matrix is shown. For the unpredictability of the system and the sensitivity of the initial data, as well as the encrypted matrix which is unknown except of the owner of the digital image, the copy rights can be effectively protected. The watermarking can be extracted with a few data, and the attacked experiential results show the algorithm has very excellent robustness against regular cut and irregular cut as well as noise and compression.