Image encryption using logistic and rectangular chaotic maps

The use of chaos for image encryption over traditional text based encryption methods has gained momentum due to its superior performance. In this paper, a fast encryption method is presented which utilizes a substitution-permutation network using two chaotic maps. Logistic maps are used to create substitution box while key dependent rectangular chaotic maps is used for permutation of pixels. The algorithm is applicable to images of any dimension. It shows improved performance and a good level of security.