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A Chaotic Cryptosystem for Color Images Using Pixel-Level and Bit-Level Pseudo-Random Permutations

  • Said HraouiEmail author
  • Faiq Gmira
  • Fouad Mohammed Abbou
  • A. Oualidi Jarrar
  • Abdellatif Jarjar
Conference paper
Part of the Lecture Notes in Intelligent Transportation and Infrastructure book series (LNITI)

Abstract

This paper, we present a novel color image encryption algorithm based on pseudorandom permutations intra and inter pixels. Firstly, confusion by modification of pixel values in the image is applied by a permutation via a bijective function in the ring \( {\mathbb{Z}}/8{\mathbb{Z}} \). Secondly, permutation is applied to all pixels in the image by the same function but this time in the ring \( {\mathbb{Z}}/\varvec{n}{\mathbb{Z}} \) to dispel the redundancy on the entire image. Finally, a second chaotic confusion is applied to the different pixels in the image. The results show that the algorithm effectively reduces the correlations between plain and ciphered image and therefore can encrypt the color image more effectively.

Keywords

Image encryption Bit-level permutation Chaos Confusion And diffusion 

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Said Hraoui
    • 1
    Email author
  • Faiq Gmira
    • 2
  • Fouad Mohammed Abbou
    • 3
  • A. Oualidi Jarrar
    • 1
  • Abdellatif Jarjar
    • 4
  1. 1.Department of Mathematics, Faculty of Sciences Dhar El MahrazSidi Mohamed Ben Abdellah University, LSOAtlas-FezMorocco
  2. 2.Laboratory of Modeling Applied to Economy and Management, Faculty of EconomicsHassan II University, Casablanca, MAEGECasablancaMorocco
  3. 3.School of Science & EngineeringAl Akhawayn UniversityIfraneMorocco
  4. 4.Secondary School Moulay RachidTazaMorocco

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