Fast encryption scheme for 3D models based on chaos system

With the development of multimedia applications, the application of 3D models becomes more and more popular, and its security has become an urgent problem to be solved. 3D objects have more complex spatial structures than 1D and 2D objects. Most of the previous work is to encrypt 3D objects directly, and this kind of algorithm is often tedious and the encryption time is long. Therefore, a new fast image encryption scheme based on chaos theory is proposed in this paper. In this scheme, the 3D object is transformed into 2D object (similar to image format), and then encrypted. The encryption process is divided into two stages: confusion stage and diffusion stage. In the confusion phase, we introduce random points. In the diffusion phase, we split the floating-point data, the integer part is encrypted by XOR, and the decimal part is scrambled only. The experimental results show that the scheme can encrypt and decrypt the 3D model correctly. The numerical results in security analysis are close to the ideal value, which shows that the scheme can resist common attacks and has high security.