3D textured model encryption via 3D Lu chaotic mapping

In the emerging Virtual/Augmented Reality（VR/AR） era, three dimensional（3 D） content will be popularized just as images and videos today. The security and privacy of these 3 D contents should be taken into consideration. 3 D contents contain surface models and solid models. Surface models include point clouds,meshes and textured models. Previous work mainly focused on the encryption of solid models, point clouds and meshes. This work focuses on the most complicated 3 D textured model. We propose a 3 D Lu chaotic mapping based encryption method for 3 D textured models. We encrypt the vertices, polygons, and textures of3 D models separately using the 3 D Lu chaotic mapping. Then the encrypted vertices, polygons and textures are composited together to form the final encrypted 3 D textured model. The experimental results reveal that our method can encrypt and decrypt 3 D textured models correctly. Furthermore, typical statistic and brute-force attacks can be resisted by the proposed method.