A Simple Chaotic Map-Based Image Encryption System Using Both Plaintext Related Permutation and Diffusion

Area of Science:

• Computer Science
• Cryptography
• Image Processing

Background:

• Traditional chaos-based image cryptosystems often exhibit security flaws, particularly susceptibility to chosen/known plaintext attacks and differential attacks due to inadequate plaintext sensitivity.
• Existing plaintext-related schemes may suffer from insufficient plaintext sensitivity, real-time encryption limitations, and low efficiency requiring multiple encryption rounds.

Purpose of the Study:

• To develop a simple, efficient, and highly secure chaotic system for color image encryption.
• To enhance plaintext sensitivity and resist advanced cryptanalytic attacks through integrated plaintext-related operations.

Main Methods:

• A novel chaotic image encryption system employing both plaintext-related permutation and diffusion.
• Utilizing a cat map for permutation, with parameters influenced by the plain image and diffusion operations.
• Integrating diffusion stage influenced by permutation parameters and plain image.

Main Results:

• The proposed system achieves high key sensitivity and plaintext sensitivity, effectively resisting chosen/known plaintext and differential attacks.
• A single round of plaintext-related permutation and diffusion is sufficient for processing, significantly improving efficiency.
• Simulation results validate the excellent security and efficiency of the proposed chaotic image encryption scheme.

Conclusions:

• The developed chaotic image encryption system offers a robust solution for secure and efficient color image protection.
• The integration of plaintext-related permutation and diffusion in a single round provides a significant advancement in chaos-based cryptography.
• The scheme demonstrates superior performance in terms of security and speed compared to existing methods.