Optical image encryption based on coherent diffractive imaging using multiple wavelengths

Wen Chen, Xudong Chen, Colin J R Sheppard

Research output: Journal article publicationJournal articleAcademic researchpeer-review

20 Citations (Scopus)


Coherent diffractive imaging is an optical technique in which the information of an object is encoded in the diffraction intensity using a single-path wave propagation strategy. In recent years, coherent diffractive imaging has attracted much attention in many fields due to its marked advantages, such as robustness to vibration and the suitability for various wavelengths. In this paper, we propose to apply coherent diffractive imaging using multiple wavelengths for optical image encryption. A light wavelength is tuned during the encryption, and a series of diffraction intensity maps (i.e., ciphertexts) is sequentially recorded in the Fresnel domain. During image decryption, an iterative retrieval algorithm is further developed, and cryptosystem security and robustness of the proposed method are also analyzed. Numerical simulation results are presented to demonstrate feasibility and effectiveness of the proposed method.
Original languageEnglish
Pages (from-to)225-228
Number of pages4
JournalOptics Communications
Issue number3
Publication statusPublished - 1 Feb 2012
Externally publishedYes


  • Coherent diffractive imaging
  • Multiple wavelengths
  • Optical image encryption and decryption
  • Phase retrieval

ASJC Scopus subject areas

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


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