  With rapid progress of Virtual Reality and Augmented Reality technologies, 3D
contents are the next widespread media in many applications. Thus, the
protection of 3D models is primarily important. Encryption of 3D models is
essential to maintain confidentiality. Previous work on encryption of 3D
surface model often consider the point clouds, the meshes and the textures
individually. In this work, a multi-level chaotic maps models for 3D textured
encryption was presented by observing the different contributions for
recognizing cipher 3D models between vertices (point cloud), polygons and
textures. For vertices which make main contribution for recognizing, we use
high level 3D Lu chaotic map to encrypt them. For polygons and textures which
make relatively smaller contributions for recognizing, we use 2D Arnold's cat
map and 1D Logistic map to encrypt them, respectively. The experimental results
show that our method can get similar performance with the other method use the
same high level chaotic map for point cloud, polygons and textures, while we
use less time. Besides, our method can resist more method of attacks such as
statistic attack, brute-force attack, correlation attack.
