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<p>Image encryption has gained significant attention these days due to the increasing need for secured transmission and storage of digital images. The traditional encryption algorithms that are based on mathematical operations, and symmetric key ciphers have shown vulnerabilities to attacks and are not well-suited for effectively securing images. The work in this paper proposes two novel chaotic maps Chaotic-Harmonics (CH) chaotic map, and Sine–cosine-Hybrid (SCH) chaotic map. The unpredictability, complexity, randomness and initial condition sensitivity of these maps have also been evaluated in this work. The work further proposes a novel image encryption scheme using the proposed CH and SCH chaotic maps in combination with dynamic Deoxyribonucleic Acid (DNA) encoding to encrypt satellite images. Unlike static DNA encoding, where a fixed rule is applied throughout the encryption process, our scheme dynamically generates a sequence of encoding rules called as Dynamic DNA Rule Sequence (DDRS) using the CH and SCH chaotic maps. DDRS changes the encoding rules for each pixel, which adds complexity to the encryption scheme and makes it much harder for attackers to employ brute force or pattern recognition attacks to break the encryption. In the first phase of the&#xa0;proposed image cryptosystem, the colored input image is converted into an array, and DDRS is generated to encode each element of the image array. The second phase generates a&#xa0;Confusion Rule Sequence (CRS) using CH and SCH chaotic maps, and uses it with an&#xa0;encoded image array of the&#xa0;first phase to perform pixel permutation. The final phase generates a&#xa0;Diffusion Control Sequence (DCS) to using both novel proposed chaotic maps, and uses it with an&#xa0;output of the&#xa0;second phase to&#xa0;perform diffusion. The scheme undergoes rigorous security analysis to demonstrate its performance against various types of attack.</p>

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An Amalgamation of Dynamic DNA and Two Novel Chaotic Maps for Satellite Image Encryption

  • 期刊论文

  • 发表日期：

    2025年6月19日

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  • Mohit Dua,
  • Suraj Singh Jadon,
  • Anant Raghuvanshi,
  • Deepanshu Vishwakarma,
  • Shelza Dua,
  • Deepti Dhingra

摘要

Image encryption has gained significant attention these days due to the increasing need for secured transmission and storage of digital images. The traditional encryption algorithms that are based on mathematical operations, and symmetric key ciphers have shown vulnerabilities to attacks and are not well-suited for effectively securing images. The work in this paper proposes two novel chaotic maps Chaotic-Harmonics (CH) chaotic map, and Sine–cosine-Hybrid (SCH) chaotic map. The unpredictability, complexity, randomness and initial condition sensitivity of these maps have also been evaluated in this work. The work further proposes a novel image encryption scheme using the proposed CH and SCH chaotic maps in combination with dynamic Deoxyribonucleic Acid (DNA) encoding to encrypt satellite images. Unlike static DNA encoding, where a fixed rule is applied throughout the encryption process, our scheme dynamically generates a sequence of encoding rules called as Dynamic DNA Rule Sequence (DDRS) using the CH and SCH chaotic maps. DDRS changes the encoding rules for each pixel, which adds complexity to the encryption scheme and makes it much harder for attackers to employ brute force or pattern recognition attacks to break the encryption. In the first phase of the proposed image cryptosystem, the colored input image is converted into an array, and DDRS is generated to encode each element of the image array. The second phase generates a Confusion Rule Sequence (CRS) using CH and SCH chaotic maps, and uses it with an encoded image array of the first phase to perform pixel permutation. The final phase generates a Diffusion Control Sequence (DCS) to using both novel proposed chaotic maps, and uses it with an output of the second phase to perform diffusion. The scheme undergoes rigorous security analysis to demonstrate its performance against various types of attack.