Journal
OPTIK
Volume 122, Issue 11, Pages 1010-1013Publisher
ELSEVIER GMBH, URBAN & FISCHER VERLAG
DOI: 10.1016/j.ijleo.2010.06.039
Keywords
Image encryption; Cryptography; Optical transform
Categories
Funding
- National Natural Science Foundation of China [10974039]
- National Basic Research Program of China [2006CB302901]
- China Postdoctoral Science Foundation [20080430913, 200902409]
- Harbin Institute of Technology [HITQNJS. 2008. 027]
- Fundamental Research Funds for the Central Universities [HIT. NSRIF. 2009038]
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We present a novel multi-image encryption and decryption algorithm based on Fourier transform and fractional Fourier transforms. Lower frequency parts of the original images are selected, frequency shifted and encrypted by using double phase encoding in fractional Fourier domains. Multiple images are encrypted together into a single one. A simple optical setup is given to implement the proposed algorithm. This scheme has features of enhancement in decryption accuracy and high optical efficiency. Numerical results have been given to verify the validity and efficiency of the proposed scheme. (C) 2010 Elsevier GmbH. All rights reserved.
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