A novel fast image encryption scheme based on 3D chaotic baker maps

Symmetric block encryption schemes, designed on invertible two-dimensional chaotic maps on a torus or a square, prove feasible and secure for real-time image encryption according to commonly used criteria given in the literature. In this paper, a typical map of this kind, namely, the baker map, is further extended to be three-dimensional and then used to speed up image encryption while retaining its high degree of security. The proposed algorithm is described in detail, along with its security analysis and implementation. Experimental results show that its three-dimensional baker map is 2-3 times faster than the two-dimensional one, showing it's great potential in real-time image encryption applications.