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Plaintext-Related Dynamic Key Chaotic Image Encryption Algorithm
Zeming Wu1, Ping Pan1, Chunyang Sun1
1Electronic Engineering College, Heilongjiang University, Harbin 150080, China.
Entropy (Basel, Switzerland)
|September 28, 2021
Summary
This study introduces a novel dynamic key chaotic image encryption algorithm. It enhances security and reduces complexity by linking encryption keys to plaintext, offering robust protection against attacks.
Area of Science:
- Computer Science
- Cryptography
- Information Security
Background:
- Existing image encryption algorithms often suffer from high complexity and inadequate security.
- There is a need for more secure and efficient methods for digital image protection.
Purpose of the Study:
- To propose a dynamic key chaotic image encryption algorithm with low complexity and high security.
- To enhance image encryption by closely associating the key with the plaintext.
Main Methods:
- RGB components of color images are normalized to generate plaintext-dependent keys.
- Arnold transform is applied to RGB components to disrupt spatial pixel correlations.
- Chaotic mapping is introduced to expand the key space and improve randomness.
Main Results:
- The algorithm achieves a key space size of 10^180, significantly enhancing security.
- Plaintext-related dynamic key acquisition ensures a unique key per image.
- Experimental results demonstrate effective image encryption and resistance to differential attacks.
Conclusions:
- The proposed algorithm offers a secure and efficient solution for image encryption.
- The dynamic key generation and chaotic mapping contribute to high security and resistance to attacks.
- This method effectively addresses the limitations of existing image encryption techniques.
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