Digital Images Encryption in Spatial Domain Based on Singular Value Decomposition and Cellular Automata

Protection of digital images from unauthorized access is the main purpose of this paper. A reliable approach to encrypt a digital image in spatial domain is presented here. Our algorithm is based on the singular value decomposition and one dimensional cellular automata. First, we calculate the singular value decomposition (SVD) of the original image in which the features of the image are extracted and then pushed them into the one dimensional cellular automata to generate the robust secret key for the image authentication. SVD is used as a strong mathematical tool to decompose a digital image into three orthogonal matrices and create features that are rotation invariant. We applied our proposed model on one hundred number of JPEG RGB images of size 800 × 800. The experimental results have illustrated the robustness, visual quality and reliability of our proposed algorithm. KeywordsDigital Images Encryption; Spatial Domain Encryption; Cellular Automata, SVD.