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A novel colour image encryption scheme using dynamic DNA coding, chaotic maps, and SHA-2

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Abstract

In this paper, a novel encryption scheme that combines hyperchaotic maps schemes, SHA-2, and a pixel-shifting based on the Zaslavskii map is proposed. The plain image is first scrambled based on values obtained from a 2-D hyperchaotic map. A cover image is then generated using the combined logistic-tent map. A mask image is then created based on a novel bit indexing scheme based on the SHA-2 value of the cover image. DNA encoding is carried out on both images, using a dynamically chosen logistic-tent map. Then diffusion using the exclusive-OR method was executed. Lastly, multiple diffusion operations are carried out to produce the cipher image. By simulational analysis, this proposed scheme has been determined to yield high security. The proposed method supersedes the previously developed method by the authors.

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Authors and Affiliations

  1. School of Electronics Engineering, Vellore Institute of Technology (VIT), Vellore, 632014, India

    L. Shane John Paul, Carlton Gracias, Anurag Desai & V. Thanikaiselvan

  2. School of Information Technology, Vellore Institute of Technology (VIT), Vellore, 632014, India

    S. Suba Shanthini

  3. Faculty, School of Electrical and Electronics Engineering, SASTRA Deemed University, Thanjavur, 613401, India

    Amirtharajan Rengarajan

Authors
  1. L. Shane John Paul
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  2. Carlton Gracias
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  3. Anurag Desai
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  4. V. Thanikaiselvan
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  5. S. Suba Shanthini
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  6. Amirtharajan Rengarajan
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Correspondence to Amirtharajan Rengarajan.

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Paul, L.S.J., Gracias, C., Desai, A. et al. A novel colour image encryption scheme using dynamic DNA coding, chaotic maps, and SHA-2. Multimed Tools Appl 81, 37873–37894 (2022). https://doi.org/10.1007/s11042-022-13095-5

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  • DOI: https://doi.org/10.1007/s11042-022-13095-5

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