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Related Experiment Video

Updated: Sep 29, 2025

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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A Novel and Fast Encryption System Based on Improved Josephus Scrambling and Chaotic Mapping.

Zhaoxiong Guan1, Junxian Li1, Linqing Huang2

  • 1School of Automation, Guangdong University of Technology, Guangzhou 510006, China.

Entropy (Basel, Switzerland)
|March 25, 2022
PubMed
Summary

An improved Josephus ring-based permutation (IJRBP) algorithm enhances scrambling and efficiency. This leads to a novel image encryption system with improved security and robustness against various attacks.

Keywords:
Josephus ringchaotic mappingefficiencyimage cryptosystemplaintext-relatedscrambling framework

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Area of Science:

  • Computer Science
  • Cryptography
  • Image Processing

Background:

  • Existing permutation algorithms like the traditional Josephus ring permutation (TJRP) suffer from weak confusion and high time complexity.
  • There is a need for more efficient and secure permutation algorithms for cryptographic applications.

Purpose of the Study:

  • To develop an improved Josephus ring-based permutation (IJRBP) algorithm.
  • To design a novel image encryption algorithm utilizing the IJRBP and a chaotic system.

Main Methods:

  • The IJRBP algorithm replaces the remove operation with position exchange and uses random permutation steps for enhanced scrambling.
  • A new encryption algorithm generates a diffusion matrix using a plaintext feature parameter and a chaotic system's random sequence.

Main Results:

  • The IJRBP algorithm demonstrates superior scrambling effect and higher permutation efficiency compared to existing methods.
  • The proposed image cryptosystem exhibits high sensitivity to plaintext changes, producing significantly different encrypted images.
  • The system shows robustness against chosen-plaintext attacks (CPAs), noise attacks, and data loss.

Conclusions:

  • The developed IJRBP algorithm addresses the limitations of traditional permutation methods.
  • The novel image cryptosystem offers excellent encryption efficiency and strong resistance to common attacks, making it suitable for secure image transmission.