Security-enhanced phase encryption assisted by nonlinear optical correlation via sparse phase

Wen Chen, Xiaogang Wang, Xudong Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

24 Citations (Scopus)


We propose a method for security-enhanced phase encryption assisted by a nonlinear optical correlation via a sparse phase. Optical configurations are established based on a phase retrieval algorithm for embedding an input image and the secret data into phase-only masks. We found that when one or a few phase-only masks generated during data hiding are sparse, it is possible to integrate these sparse masks into those phase-only masks generated during the encoding of the input image. Synthesized phase-only masks are used for the recovery, and sparse distributions (i.e., binary maps) for generating the incomplete phase-only masks are considered as additional parameters for the recovery of secret data. It is difficult for unauthorized receivers to know that a useful phase has been sparsely distributed in the finally generated phase-only masks for secret-data recovery. Only when the secret data are correctly verified can the input image obtained with valid keys be claimed as targeted information.
Original languageEnglish
Article number035702
JournalJournal of Optics (United Kingdom)
Issue number3
Publication statusPublished - 1 Jan 2015
Externally publishedYes


  • nonlinear correlation
  • optical security enhancement
  • phase encryption
  • phase retrieval

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics


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