Security-enhanced interference-based optical image encryption

Wen Chen, Xudong Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

44 Citations (Scopus)


Interference-based optical image encryption has triggered much current attention due to its marked advantages, such as non-iterative operation. Although interference-based optical image encryption is an effective approach, cryptosystem security is still a great concern from a cryptanalysis point of view and higher security is always desirable. In this paper, we propose a novel method to enhance the security for conventional interference-based optical image encryption in the fractional Fourier transform (FrFT) domain. A series of random and fixed phase-only masks is used in the optical paths, and subsequently interference principle is applied to extract two phase-only masks (i.e., ciphertexts) during image encryption. Feasibility and effectiveness of the proposed method are demonstrated by computer simulations.
Original languageEnglish
Pages (from-to)123-129
Number of pages7
JournalOptics Communications
Issue number1
Publication statusPublished - 1 Jan 2013
Externally publishedYes


  • Fractional fourier transform
  • Optical image encryption
  • Optical interference
  • Security enhancement

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering


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