Image encryption algorithm using chaotic Chebyshev generator

Abstract

In this paper, we present a chaotic image encryption algorithm in which the key stream is generated by nonlinear Chebyshev function. The novel method of designing pseudorandom chaotic sequence is carried out with the created secret keys depending on with each other. We then make multiple permutation of pixels to decrease the strong correlation between adjacent pixels in original plain image. Further, a two-dimensional Chebyshev function is considered to avoid known-plaintext and chosen-plaintext attacks in diffusion process, i.e., even with a one-bit change in original plain image, the encrypted image would become different greatly. Simulation results are given to show that the proposed method can offer us an efficient way of encrypting image.

Image Encryption Using Chebyshev Map and Rotation Equation

“…Novel image encryption scheme with Chebyshev map based diffusion operations is presented in [3]. A novel design method of key stream by chaotic Chebyshev function is proposed in [4]. In [5], a secure Diffie-Hellman key agreement protocol based on Chebyshev chaotic map is presented.…”

Image Encryption Based on 2-D Zaslavskii Chaotic Map and Pseudo Hadmard Transform

“…In [6], the computational time is reduced by encrypting significant data in spatial domain and insignificant data in wavelet domain. Xiaoling Huang [8] proposed encryption scheme based on chaotic Chebyshev generator with multiple permutations to enhance the decorrelation. The authors of [9] proposed image encryption with circle map and is resistant against differential attacks.…”

A Novel Hyper Chaos-based Image Encryption Algorithm Using Dynamic DNA Coding and SHA-256

“…Because the chaotic system has the characteristics of sensitivity to initial conditions and system parameters, pseudo randomness, uncertainty and ergodicity, it is consistent with the two basic principles of cryptography: diffusion and confusion. Digital image encryption based on chaos has been a hotspot; also, many image encryption algorithms based on chaos have been proposed [7][8][9][10][11]. However, these algorithms are all traditional ones based on diffusionscrambling structure.…”