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A Hybrid Domain Image Encryption Algorithm Based on Improved Henon Map.

Yong Chen1, Shucui Xie2, Jianzhong Zhang3

  • 1School of Communication and Information Engineering, Xi'an University of Posts and Telecommunications, Xi'an 710121, China.

Entropy (Basel, Switzerland)
|February 25, 2022
PubMed
Summary

This study introduces a novel hybrid image encryption algorithm using an improved Henon map (2D-ICHM), wavelet transform, and DNA operations. The algorithm offers enhanced security and robustness for digital image protection.

Keywords:
SHA-512double sandwich structureimage encryptionimproved Henon mapinteger wavelet transform

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Area of Science:

  • Cryptography
  • Image Processing
  • Applied Mathematics

Background:

  • Traditional image encryption methods face challenges in balancing security and efficiency.
  • Chaotic maps offer complex dynamics suitable for cryptographic applications.
  • Hybrid approaches combining spatial and frequency domain techniques can improve encryption robustness.

Purpose of the Study:

  • To develop a novel hybrid domain image encryption algorithm with enhanced security and robustness.
  • To introduce an improved Henon map (2D-ICHM) with superior chaotic characteristics.
  • To propose a double sandwich encryption structure for comprehensive image protection.

Main Methods:

  • Integration of an improved Henon map (2D-ICHM), integer wavelet transform (IWT), bit-plane decomposition, and DNA sequence operations.
  • Development of a diffusion-scrambling-diffusion structure operating across spatial and frequency domains.
  • Generation of algorithm parameters using the secure hash algorithm-512 (SHA-512) of the plain image for high sensitivity.

Main Results:

  • The 2D-ICHM exhibits a larger parameter space, continuous chaotic range, and more complex dynamics than existing maps.
  • The proposed double sandwich structure effectively integrates spatial and frequency domain operations.
  • The algorithm demonstrates high sensitivity to plain images, ensuring security against unauthorized access.
  • Simulation and security analysis confirm the algorithm's high security level and robustness.

Conclusions:

  • The developed hybrid domain image encryption algorithm provides a secure and robust solution for digital image protection.
  • The improved Henon map (2D-ICHM) and the double sandwich structure are key innovations enhancing encryption performance.
  • The algorithm's sensitivity and robustness make it suitable for applications requiring strong image security.