Pixel-Level and DNA-Level Image Encryption Method Based on Five-Dimensional Hyperchaotic System

Area of Science:

• Information Security
• Applied Cryptography
• Digital Image Processing

Background:

• Image encryption is crucial for securing sensitive visual data.
• Existing methods face challenges in balancing security and efficiency.
• Hyperchaotic systems offer potential for complex cryptographic applications.

Purpose of the Study:

• To propose a novel image encryption method, PD5H, for enhanced information security.
• To integrate pixel-level and DNA-level encryption using a five-dimensional hyperchaotic system.
• To improve resistance against common cryptanalytic attacks and data loss.

Main Methods:

• Development of a five-dimensional hyperchaotic system for generating complex chaotic sequences.
• Implementation of a pixel-block internal diffusion method to reduce pixel correlation.
• Integration of pixel-level and DNA-level encryption via a novel 'joint diffusion' process.

Main Results:

• PD5H achieves a large key space and extremely low image correlation.
• The method exhibits uniform ciphertext pixel distribution and high entropy (>7.999).
• Demonstrated strong resistance to differential attacks and data loss.

Conclusions:

• PD5H provides excellent performance for color image encryption.
• The proposed method effectively resists various common security attacks.
• PD5H enhances overall image information security through its unique encryption strategy.