Abstract
In this study, a novel technique using a hyper chaotic dynamical system and DNA computing has been designed with high plaintext sensitivity. In order to reduce cost, a selection procedure using tent map has been employed for generating different key streams from the same chaotic data obtained from the iterations of chaotic dynamical system. After separating the three channels from the input color image, they are both confused and diffused. First of all, these channels are diffused on a decimal level. Then they are permuted. Further, DNA encoding is performed upon these channels. Moreover, DNA level diffusion is performed to further increase the degree of randomness in the image. Lastly, the DNA encoded image is converted into decimal to get the final cipher image. Both the experimental results and security analysis strongly demonstrate the robustness of the proposed scheme. A comparison of the proposed scheme has also been made with other recently developed schemes to show that this scheme outperforms the others in terms of computational cost, time and memory efficiency. Additionally, with the large key space, the proposed scheme can resist any brute force, plaintext and statistical attacks, therefore it is a good fit for the real world applications of the image security.
Highlights
With the digitalization of the world, cyber security of digital data that flows through the Internet in various forms is one of the main concern for the future of digitalization
An image encryption scheme based on hyper chaotic dynamical system [44] and DNA computing is designed with the following novel highlights:
The chaotic data obtained from chaotic dynamical system (CDS) is of high quality and Chaotic Dynamical State Variables Selection Procedure (CDSVSP) is quite efficient in generating entirely random selected sequences from it
Summary
With the digitalization of the world, cyber security of digital data that flows through the Internet in various forms is one of the main concern for the future of digitalization. Even a single pixel value change of a plain image will result into entirely different DNA sequences, making the proposed scheme more secure against the plaintext and statistical attacks Following this idea, an image encryption scheme based on hyper chaotic dynamical system [44] and DNA computing is designed with the following novel highlights:. To use the full potential of DNA computing, based on key streams different sequences of pseudo random numbers are generated to be used as rules for DNA operations and conversion of decimal pixel values to DNA and vice versa This improves greatly the unpredictability and randomness of resultant DNA sequences or cipher image.
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