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Related Experiment Video

Updated: Aug 10, 2025

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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Double Image Encryption System Using a Nonlinear Joint Transform Correlator in the Fourier Domain.

Ronal A Perez1, Elisabet Pérez-Cabré2, Juan M Vilardy1

  • 1Grupo de Investigación en Física del Estado Sólido (GIFES), Faculties of Basic and Applied Sciences, and Engineering, Universidad de La Guajira, Riohacha 440007, La Guajira, Colombia.

Sensors (Basel, Switzerland)
|February 11, 2023
PubMed
Summary

This study introduces a novel nonlinear joint transform correlator for secure, simultaneous encryption and decryption of two images using double random phase encoding. The system offers enhanced security and high-quality decrypted images with a single real-valued encrypted signal.

Keywords:
Fourier domaindouble image encryptionjoint transform correlator (JTC)

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Area of Science:

  • Optics
  • Information Security
  • Image Processing

Background:

  • Traditional image encryption methods face challenges in security and efficiency.
  • Simultaneous encryption of multiple images requires robust architectures.
  • Double Random Phase Encoding (DRPE) is a known technique but can be improved.

Purpose of the Study:

  • To propose a new nonlinear joint transform correlator (JTC) architecture for simultaneous encryption and decryption of two images.
  • To enhance security and image quality in optical encryption systems.
  • To develop a system with a larger key space for improved security.

Main Methods:

  • Implementation of a nonlinear JTC in the Fourier domain (FD).
  • Utilizing Double Random Phase Encoding (DRPE) with four Random Phase Masks (RPMs).
  • Applying specific nonlinear operations on the Joint Power Spectrum (JPS) to generate a single real-valued encrypted signal.

Main Results:

  • Achieved simultaneous encryption and decryption of two images with high quality.
  • Generated a single real-valued encrypted signal, increasing security.
  • Demonstrated a larger key space due to the use of four RPMs.

Conclusions:

  • The proposed nonlinear JTC architecture offers a secure and efficient method for double image encryption.
  • The system provides enhanced security against various attacks, including brute force and deep learning.
  • Computational simulations validate the feasibility and performance of the proposed system.