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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
PubMed
Summary
This summary is machine-generated.

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.

Keywords:
chaotic systemsdynamic keysimage encryptionplaintext-related

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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.