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Optical phase-truncation-based double-image encryption using equal modulus decomposition and random masks.

Guangyu Luan1, Chenggen Quan2

  • 1College of Electrical and Information, Heilongjiang Bayi Agricultural University, Daqing, 163319, Heilongjiang, China. luanguangyu@126.com.

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This study presents a secure optical encryption method using random masks and equal modulus decomposition, preventing image crosstalk and enhancing data security against attacks.

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Area of Science:

  • Optics
  • Information Security
  • Cryptography

Background:

  • Optical encryption schemes are vulnerable to various attacks.
  • Existing methods like phase-truncation can lead to information leakage.

Purpose of the Study:

  • To develop a novel optical encryption scheme free from double-image crosstalk.
  • To enhance security against sophisticated attacks.

Main Methods:

  • Utilized equal modulus decomposition (EMD) and random masks for encryption.
  • Encrypted two plaintexts into one ciphertext and two private key masks.
  • Introduced random amplitude and phase masks.

Main Results:

  • Achieved crosstalk-free encryption of double images.
  • The scheme demonstrated immunity to information leakage and various attacks.
  • Simulation confirmed the feasibility and validity of the proposed method.

Conclusions:

  • The proposed optical encryption scheme offers robust security.
  • Incorporating diffraction distances and wavelength as keys significantly boosts security.
  • This method provides a secure solution for optical information protection.