A novel chaotic based image encryption using a hybrid model of deoxyribonucleic acid and cellular automata

Asymmetric multiple-image encryption based on the cascaded fractional Fourier transform

Efficient and secure opto-cryptosystem for color images using 2D logistic-based fractional Fourier transform

A new multi-image encryption scheme with an optical implementation based on the nonlinear fractional Mellin transform is proposed, which could avoid the vulnerability of the linear encryption systems and encrypt multiple images simultaneously. In the proposed scheme, the original images are transformed into spectra by the discrete cosine transform, then the spectra are incised and spliced into a composite spectrum, and finally the composite spectrum is performed by the nonlinear fractional Mellin transform to obtain the final encrypted image. After the processing of the fractional Mellin transform, amplitude encoding and phase encoding are adopted. The orders of the fractional Mellin transform are the main keys of this multi-image encryption scheme. Simulation results demonstrate the validity and the security of the proposed scheme.

Optical multi-image encryption scheme based on discrete cosine transform and nonlinear fractional Mellin transform

Recently, the digital multimedia security technology has been an interesting research theme due to fast advancement in employing real time multimedia through Internet and wireless networks. The market of multimedia streaming, such as exclusive video on demand (VoD) is a huge multi- billion-dollar market. This market is threatened by hackers. The multimedia streaming industry needs a cryptosystem that is both fast and secure. Chaotic cryptosystems have been proposed by many researchers in order to promote communication security. However, these chaotic schemes have some major problems, such as unacceptable expansion of data, slow performance speed, and shortcomings against differential attack. Therefore, this paper provides an efficient Fractional Fourier Transform (FrFT)-based logistic map (LM) color image encryption scheme by applying a 2D LM on FrFT. In the proposed FrFT-based LM color image encryption scheme, the 2D LM is employed as a confusion step to scramble the color image pixel positions in the FrFT and confuse the relationship between the cipherimage and the plainimage. For enhancing the encryption performance characteristics of the 2D LM under the FrFT, the angle of the FrFT is taken as an extra additional key in encryption. The proposed FrFT-based LM color image encryption scheme is examined and investigated using visual inspection, entropy, histograms, encryption quality, noise tests, and differential analysis. The obtained simulation tests demonstrate and verify the effectiveness of the FrFT-based LM color image encryption scheme. Moreover, our results also show a significant improvement in the performance of the confusion property with our proposed 2D LM encryption scheme using the FrFT. Also, we compared the proposed cryptosystem with recent state-of-the-art cryptosystems. Experimental results show that our proposed image cryptosystem is highly secure from the cryptographic point of view. Furthermore, the obtained test results ensured the superiority of our proposed cryptosystem for digital image transmission compared to the recent state-of-theart cryptosystems.

Lei Xu

Papers

Vector power multiple-parameter fractional Fourier transform of image encryption algorithm