Abstract
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 language | English |
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Pages (from-to) | 123-129 |
Number of pages | 7 |
Journal | Optics Communications |
Volume | 286 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1 Jan 2013 |
Externally published | Yes |
Keywords
- 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