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A Bijective Image Encryption System Based on Hybrid Chaotic Map Diffusion and DNA Confusion.

Dalia H ElKamchouchi1,2, Heba G Mohamed2,3, Karim H Moussa4

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This study introduces a novel symmetric cryptosystem using hybrid chaotic Lorenz diffusion and DNA confusion for secure image transmission. The system offers enhanced security against various attacks and improved sensitivity to key changes.

Keywords:
DNAcommunicationsdecryptionencryptionhybrid chaoticimagesecured

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Area of Science:

  • Cryptography
  • Information Security
  • Applied Mathematics

Background:

  • Modern multimedia communications demand advanced security standards.
  • Existing cryptosystems face challenges in robust image encryption.
  • The need for secure image transmission is paramount.

Purpose of the Study:

  • To present an innovative symmetric cryptosystem for secure image transmission.
  • To enhance image encryption security using a hybrid chaotic and DNA-based approach.
  • To develop a bijective system for simplified secure image encoding and decoding.

Main Methods:

  • Utilizes a hybrid chaotic Lorenz diffusion stage and a DNA confusion stage.
  • Employs two distinct non-consecutive chaotic diffusion stages with an intermediate DNA scrambling stage.
  • Divides the image into eight scrambled matrices, converting each using Watson-Crick rules.

Main Results:

  • The proposed scheme demonstrates robustness against chosen/known plaintext attacks, differential attacks, and cipher image attacks.
  • Exhibits superior statistical properties, a larger key space, and enhanced plain text and key sensitivity.
  • Shows high sensitivity to minimal changes in the secret key.

Conclusions:

  • The developed symmetric cryptosystem offers a significant advancement in secure image transmission.
  • The hybrid chaotic-DNA approach provides a strong defense against sophisticated cryptanalytic attacks.
  • The system's sensitivity and robustness make it a promising solution for high-security communication.