A secure lightweight texture encryption scheme

Abstract

Due to the widespread application of augmented and virtual environments, the research into 3D content protection is fundamentally important. To maintain confidentiality, encryption of 3D content, including the 3D objects and texture images, is essential. In this paper, a novel texture encryption scheme is proposed which complements the existing 3D object encryption methods. The proposed method encrypts texture images by bit masking and a permutation procedure using the Salsa20/12 stream cipher. The method is lightweight and satisfies the security requirement. It also prevents the partial disclosure of the encrypted 3D surface geometry by protecting the texture patterns from being partially leaked. The scheme has a better speed-security profile than the full encryption and the selective (4most significant bit-plane) encryption by 128-bit AES. The encryption schemes are implemented and tested with 500 sample texture images. The experimental results show that the scheme has a better encryption performance compared to the full/selective encryption by 128-bit AES.