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Design and Embedded Implementation of Secure Image Encryption Scheme Using DWT and 2D-LASM.

Heping Wen1,2, Zefeng Chen1, Jiehong Zheng1

  • 1School of Electronic Information, Zhongshan Institute, University of Electronic Science and Technology of China, Zhongshan 528402, China.

Entropy (Basel, Switzerland)
|July 8, 2023
PubMed
Summary
This summary is machine-generated.

This study introduces a novel image encryption algorithm using a 2D-Logistic-adjusted-Sine map (2D-LASM) and Discrete Wavelet Transform (DWT). The method enhances digital image transmission security and efficiency, offering superior concealment and resistance to attacks.

Keywords:
DWTfrequency-domain analysisimage encryption

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Area of Science:

  • Computer Science
  • Information Security
  • Applied Mathematics

Background:

  • Digital image transmission requires robust security measures to prevent unauthorized access and data breaches.
  • Existing image encryption algorithms face challenges in balancing security, efficiency, and computational complexity.
  • Frequency-domain encryption methods offer potential advantages over spatial-domain approaches.

Purpose of the Study:

  • To propose a novel, highly effective image encryption algorithm for digital image transmission.
  • To enhance information effectiveness, security, and encryption efficiency in digital image communication.
  • To leverage chaotic systems and wavelet transforms for advanced image security.

Main Methods:

  • A dynamic key generation using Message-Digest Algorithm 5 (MD5) with plaintext correlation.
  • Generation of a chaotic pseudo-random sequence using a 2D-Logistic-adjusted-Sine map (2D-LASM).
  • Application of Discrete Wavelet Transform (DWT) for time-to-frequency domain mapping and coefficient decomposition.
  • Encryption of low-frequency coefficients via confusion-permutation and permutation of high-frequency coefficients.
  • Dynamic diffusion of the ciphertext using the chaotic sequence.

Main Results:

  • The proposed algorithm demonstrates a large key space, ensuring strong resistance against various attacks.
  • Significant advantages in computational complexity, security performance, and encryption efficiency compared to spatial-domain algorithms.
  • Improved image concealment compared to existing frequency-domain encryption methods.
  • Successful implementation and verification of experimental feasibility on embedded devices in optical network environments.

Conclusions:

  • The 2D-LASM and DWT-based image encryption algorithm offers a secure and efficient solution for digital image transmission.
  • The algorithm provides a robust balance between security, speed, and image concealment.
  • Its practical feasibility is confirmed for modern network applications, including optical networks.