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<p>In this document, we propose an enhanced technique for encrypting color images, building upon a substantial refinement of the traditional Vigenere method, guaranteed by two strong pseudo-random replacement tables built from the utilization of dynamic linear functions and the most frequently utilized chaotic maps in cryptography domain. After original image vectorization and initialization value calculation, which serve to modify the initial pixel value, thereby triggering the ciphering procedure, our technique integrates a novel Vigenere circuit using dynamic pseudorandom functions to change pixel values. Finally, a positional shift of each pixel is applied to maximize the temporal complexity of our technology. Experiments carried out on a wide range of images spanning various formats and dimensions confirm the robustness of our method against established attack techniques.</p> Graphical abstract <p></p>

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New Vigenere method with pseudo-random affine functions for color image encryption

  • 期刊论文

  • 发表日期：

    2025年2月25日

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  • Hamid El Bourakkadi,
  • Abdelhakim Chemlal,
  • Hassan Tabti,
  • Mourad Kattass,
  • Abdellatif Jarjar,
  • Abdelhamid Benazzi

摘要

In this document, we propose an enhanced technique for encrypting color images, building upon a substantial refinement of the traditional Vigenere method, guaranteed by two strong pseudo-random replacement tables built from the utilization of dynamic linear functions and the most frequently utilized chaotic maps in cryptography domain. After original image vectorization and initialization value calculation, which serve to modify the initial pixel value, thereby triggering the ciphering procedure, our technique integrates a novel Vigenere circuit using dynamic pseudorandom functions to change pixel values. Finally, a positional shift of each pixel is applied to maximize the temporal complexity of our technology. Experiments carried out on a wide range of images spanning various formats and dimensions confirm the robustness of our method against established attack techniques.

Graphical abstract