Abstract
Recently, image encryption has taken an importance especially after the dramatic evolution of the internet and network communication. The importance of securing the images contents is due to the simplicity of capturing and transferring of digital images in various communication media. Although there are many approaches for image encryptions, chaos-based image encryption approach is considered one of the most appropriate approaches because of its simplicity, security, and sensitivity to the input parameter. This research paper presents a new technique for encrypting RGB image components using nonlinear chaotic function and DNA sequence. A new image with the same dimensions of the plain-image is used as a key for confusions and diffusion process for each RGB components of plain-image. Experimental results show the efficiency of the proposed technique, simplicity, and high level of resistant against several cryptanalyst.
Highlights
Images are the most common and popular multimedia data type a days, due to the simple and easy way of capturing and transmitting [1]
Image encryption can be defined as the use of set of process called algorithm to convert the plain image into a ciphered image in such a way that no one can recover it except for the sender and the intended recipient [2] [5]
The scheme of the chaos-based image encryption is depicted in Fig. 1, as it is shown in Fig. 1 the plain image goes through two processes, namely, confusion process and diffusion process
Summary
Images are the most common and popular multimedia data type a days, due to the simple and easy way of capturing and transmitting [1]. Fridrich suggested two processes for chaos-based image encryption: confusion and diffusion. We list some of the related works starting with Choi et al who proposed a framework by the using addition, rotation and XOR to achieve confusion and diffusion for the plain image. In the proposed framework the confusion-diffusion process is done by implement the rotation and XOR operation with chaotic sequences which are generated by the using of two logistic maps [10]. The proposed method is based on permutation, diffusion, and pixel randomization process, at first the proposed method generates chaotic two sequences by the using of the quadratic and the cubic map, the generated two sequences will be used to shuffle the plain image. Enayatifar et al proposed a method for image encryption that is based on chaotic map and deoxyribonucleic acid (DNA).
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