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Multiple-image encryption scheme based on cascaded fractional Fourier transform.

Dezhao Kong1, Xueju Shen, Qinzu Xu

  • 1Department of Electronic and Optics, Shijiazhuang Mechanical Engineer College, Shijiazhuang, China. Xiaowu89511@126.com

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This study introduces a novel cascaded fractional Fourier transform method for robust multiple-image encryption. The technique enhances security through multikey usage and cascaded stages, enabling secure multiuser authentication and hierarchical encryption.

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Area of Science:

  • Optics and Photonics
  • Information Security
  • Digital Image Processing

Background:

  • Traditional image encryption methods face challenges in security and flexibility.
  • The need for secure and versatile solutions for multiple image encryption is growing.

Purpose of the Study:

  • To propose a novel multiple-image encryption scheme using cascaded fractional Fourier transform.
  • To enhance security, enable multiuser authentication, and achieve hierarchical encryption.

Main Methods:

  • Images are successively coded into amplitude and phase using cascaded stages.
  • The scheme leverages multikeys and the cascaded structure for encryption.
  • Numerical simulations are employed to verify feasibility and security.

Main Results:

  • The proposed scheme successfully encrypts multiple images.
  • Enhanced security and diverse applications, including multiuser authentication and hierarchical encryption, are achieved.
  • Feasibility, security, and decryption characteristics are validated through simulations.

Conclusions:

  • The cascaded fractional Fourier transform scheme offers a secure and flexible solution for multiple-image encryption.
  • The method supports advanced features like multiuser authentication and hierarchical encryption.
  • Simple photoelectric mixed devices can be used for practical implementation.