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Related Experiment Video

Updated: Jun 26, 2026

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
08:39

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

Impulse attack free double-random-phase encryption scheme with randomized lens-phase functions.

Pramod Kumar1, Arvind Kumar, Joby Joseph

  • 1Department of Physics, Indian Institute of Technology Delhi, Delhi, India. pramod_phz@rediffmail.com

Optics Letters
|February 3, 2009
PubMed
Summary
This summary is machine-generated.

This study enhances double-random-phase encryption (DRPE) security against impulse attacks by modifying Fourier transforms (FT) with random-phase functions. The new method ensures a random output for delta function inputs, improving encryption safety.

Related Experiment Videos

Last Updated: Jun 26, 2026

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
08:39

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

Area of Science:

  • Optics and Information Security
  • Digital Image Processing
  • Cryptography

Background:

  • Conventional Fourier-based double-random-phase encryption (DRPE) is vulnerable to impulse attacks.
  • The Fourier transform (FT) of a delta function yields a unity function, compromising DRPE security.
  • Existing DRPE methods require enhanced robustness against specific attack vectors.

Purpose of the Study:

  • To develop a modified Fourier transform (MFTLR) to enhance DRPE security.
  • To specifically address and negate vulnerabilities to impulse attacks in DRPE systems.
  • To improve the overall safety and resilience of the encryption technique.

Main Methods:

  • Modified the phase factors of lenses in the DRPE system by multiplying with random-phase functions.
  • Introduced a modified Fourier transform (MFTLR) that produces random output for delta function inputs.
  • Validated the proposed MFTLR-enhanced DRPE technique using numerical simulations and experimental setups.

Main Results:

  • The MFTLR effectively randomizes the output for delta function inputs, unlike the conventional FT.
  • The modified DRPE system demonstrated enhanced security features against impulse attacks.
  • Numerical and experimental results confirmed the efficacy and feasibility of the proposed encryption method.

Conclusions:

  • The proposed MFTLR-based DRPE technique significantly improves security against impulse attacks.
  • Randomizing lens phase functions is a viable strategy to fortify optical encryption systems.
  • The enhanced DRPE offers a more robust solution for secure information transmission.