A color image encryption with heterogeneous bit-permutation and correlated chaos

Novel image encryption algorithm based on cycle shift and chaotic system

Optical color image encryption based on computer generated hologram and chaotic theory

This paper combines DNA computing with double-chaos systems and proposes an algorithm for color image encryption at the bit level. First, we use Arnold algorithm to scramble the three components of the color image, and the number of iterations was determined by the average of the three components, which improved the scrambling effect of Arnold algorithm. Secondly, after a lot of experiments, we propose a double-chaos system composed of Lorenz chaotic mapping with variable parameters and fourth-order Rossler hyperchaotic mapping to generate three sets of chaotic sequences for diffusion operation. The double-chaos system compensates the pseudo-randomness of the two types of chaotic mappings, making chaotic sequences more difficult to predict. Then, we transform the chaotic component images and chaotic sequences into DNA sequences in accordance with eight DNA coding rules, and the coding rules are determined by plaintext information or generated chaotic sequences. We also perform addition, subtraction, and XOR operations on them. DNA computation can realize color image bit-level diffusion and reduce the computational cost. The plaintext information is embedded in the encryption process to achieve “One-Time Pad”. Simulation experiments and detailed analysis are conducted with the proposed encryption scheme to prove that the algorithm has good security performance and can effectively resist all types of attacks, indicating that the proposed algorithm is competitive.

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Color Image Encryption Algorithm Based on DNA Coding and Double Chaos System

In this paper, we evaluate the security of an enhanced double random phase encoding (DRPE) image encryption scheme (2013 J Lightwave Technol 31 2533) The original system employs a chaotic Baker map prior to DRPE to provide more protection to the plain image and hence promote the security level of DRPE, as claimed However, cryptanalysis shows that this scheme is vulnerable to a chosen-plaintext attack, and the ciphertext can be precisely recovered The corresponding improvement is subsequently reported upon the basic premise that no extra equipment or computational complexity is required The simulation results and security analyses prove its effectiveness and security The proposed achievements are suitable for all cryptosystems under permutation and, following that, the DRPE architecture, and we hope that our work can motivate the further research on optical image encryption

https://iopscience.iop.org/article/10.1088/2040-8978/16/12/125403/pdf

Cryptanalysis and improvement of an optical image encryption scheme using a chaotic Baker map and double random phase encoding

A novel optical image encryption is proposed based on two-step-only quadrature phase-shifting interferometry.Only two interferograms are needed to reconstruct a zero-order-and twin-image-free hologram in this phase-shifting digital holography interference.Such technique precludes the need from recording either the reference wave or the object wave intensity.The object wavefront propagates with two Fresnel transforms in the light path,combined with the double random phase encoding.The following is that introducing zero and л/2 phase into reference waves respectively and recording two digital holograms as encrypted image.As long as the correct key is given in the decryption,a clear original image can be reconstructed by a simple calculation.The feasibility and its robustness against occlusion and noise attacks are verified by a series of numerical simulations.

Jian Liu

Papers

Optical color image encryption based on computer generated hologram and chaotic theory

Amplitude Image Optical Encryption Based on Two-step-only Quadrature Phase-shifting Interferometry