A chaos-based symmetric image encryption scheme using a bit-level permutation

A new image encryption algorithm based on hyper-chaos

In recent years, various image encryption algorithms based on the permutation-diffusion architecture have been proposed where, however, permutation and diffusion are considered as two separate stages, both requiring image-scanning to obtain pixel values. If these two stages are combined, the duplicated scanning effort can be reduced and the encryption can be accelerated. In this paper, a fast image encryption algorithm with combined permutation and diffusion is proposed. First, the image is partitioned into blocks of pixels. Then, spatiotemporal chaos is employed to shuffle the blocks and, at the same time, to change the pixel values. Meanwhile, an efficient method for generating pseudorandom numbers from spatiotemporal chaos is suggested, which further increases the encryption speed. Theoretical analyses and computer simulations both confirm that the new algorithm has high security and is very fast for practical image encryption.

A new chaos-based fast image encryption algorithm

Color image encryption using spatial bit-level permutation and high-dimension chaotic system

A novel chaos-based image encryption algorithm using DNA sequence operations

Chaos-based image encryption algorithm ✩

In this paper, a general key stream generator based on discrete chaotic maps is presented. The new design of generator is to divide the attractor of a chaotic system into equal subregions, which are associated with 0 or 1 dynamically. The analysis and experimental results demonstrate that it is an efficient way to generate key streams with desired long cycle length. Moreover, the generated key streams have good statistical properties such as the uniform distribution, δ-like auto-correlation function, and near-zero crosscorrelation function, etc.

Fangjun Huang

Papers

Chaos-based image encryption algorithm ✩

A Generalized Chaos-Based Stream Generator