Abstract
Visual selective image encryption can both improve the efficiency of the image encryption algorithm and reduce the frequency and severity of attacks against data. In this article, a new form of encryption is proposed based on keys derived from Deoxyribonucleic Acid (DNA) and plaintext image. The proposed scheme results in chaotic visual selective encryption of image data. In order to make and ensure that this new scheme is robust and secure against various kinds of attacks, the initial conditions of the chaotic maps utilized are generated from a random DNA sequence as well as plaintext image via an SHA-512 hash function. To increase the key space, three different single dimension chaotic maps are used. In the proposed scheme, these maps introduce diffusion in a plain image by selecting a block that have greater correlation and then it is bitwise XORed with the random matrix. The other two chaotic maps break the correlation among adjacent pixels via confusion (row and column shuffling). Once the ciphertext image has been divided into the respective units of Most Significant Bits (MSBs) and Least Significant Bit (LSBs), the host image is passed through lifting wavelet transformation, which replaces the low-frequency blocks of the host image (i.e., HL and HH) with the aforementioned MSBs and LSBs of ciphertext. This produces a final visual selective encrypted image and all security measures proves the robustness of the proposed scheme.
Highlights
Nowadays, digital networking has modified most common means of communication
All initial values and controlled parameters of relevant chaotic systems are computed by passing Deoxyribonucleic Acid (DNA) sequence and plaintext image through SHA-12 hash function
The original plaintext image to be encrypted is shuffled via row and column of pixels using two random sequences to introduce confusion
Summary
Digital networking has modified most common means of communication. Any user can send and receive information through the network but this creates a great threat for eavesdroppers to breach the security of confidential information. The authors in [5], designed dynamic S-Boxes based image encryption scheme using multiple chaotic maps. Zhu et al designed a chaos-based S-boxes to enhance the security of an image encryption scheme [6]. Others [30] have likewise, presented DNA and chaos-based encryption scheme that are secure but lightweight In one such method, the plaintext image is first confused via random number generated from cross coupled chaotic logistic map and encrypted via DNA computation. Chen et al proposed a secure, and efficient image encryption scheme, this one derived from self-adaptive permutation-diffusion and random DNA encoding. The attributes and strengths of the proposed scheme form the focus of section IV, and section V illustrates the conclusion of the proposed work
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