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Hyperchaotic Image Encryption Based on Multiple Bit Permutation and Diffusion.

Taiyong Li1, Duzhong Zhang1

  • 1School of Economic Information Engineering, Southwestern University of Finance and Economics, Chengdu 611130, China.

Entropy (Basel, Switzerland)
|April 30, 2021
PubMed
Summary
This summary is machine-generated.

This study introduces a new hyperchaotic image encryption method using multiple bit permutation and diffusion (MBPD). The novel approach enhances image security against unauthorized access and various attacks.

Keywords:
diffusionhyperchaoticimage encryptionmultiple bit operationpermutation

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Area of Science:

  • Cybersecurity
  • Applied Cryptography
  • Information Security

Background:

  • Image security is critical in the digital age, with hyperchaotic encryption gaining traction.
  • Existing methods often lack diversity by focusing on single data levels (pixel, bit, DNA).

Purpose of the Study:

  • To propose a novel hyperchaotic image encryption scheme, Multiple Bit Permutation and Diffusion (MBPD), to address limitations in current methods.
  • To enhance the security and diversity of image encryption techniques.

Main Methods:

  • A novel four-dimensional hyperchaotic system with three positive Lyapunov exponents was developed.
  • A hyperchaotic sequence generated from this system drives the encryption process.
  • Multiple bit permutation and diffusion operations (1-8+ bits) were designed, controlled by the hyperchaotic sequence.

Main Results:

  • The proposed MBPD scheme was applied to public test images.
  • Extensive experiments demonstrated the scheme's effectiveness.
  • Results confirmed MBPD's ability to resist diverse attacks.

Conclusions:

  • The MBPD scheme offers enhanced image security and diversity compared to existing methods.
  • The proposed approach provides a robust solution for hyperchaotic image encryption.