Journal
OPTIK
Volume 123, Issue 5, Pages 428-432Publisher
ELSEVIER GMBH, URBAN & FISCHER VERLAG
DOI: 10.1016/j.ijleo.2011.04.022
Keywords
Image encryption; Local random phase encoding; Fractional transform
Categories
Funding
- National Natural Science Foundation of China [10974039, 11047153]
- Specialized Research Fund for the Doctoral Program of Higher Education [20102302120009]
- Development Program for Outstanding Young Teachers in Harbin Institute of Technology [HITQNJS.2008.027]
- Fundamental Research Funds for the Central Universities [HIT.NSRIF.2009038]
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Based on fractional Fourier transform, an image encryption algorithm is proposed and researched. A local random phase encoding is introduced into this algorithm. The data at the local area of complex function is converted by fractional Fourier transform. The local random phase encoding is performed many times. Moreover only one set of random phase data is used in image encryption process. Compare to double random phase encoding, the parameter defining local area can be regarded as the additional key to increase the security of the encryption scheme. Some numerical simulations are achieved to demonstrate the performance of the image encryption scheme. (C) 2011 Elsevier GmbH. All rights reserved.
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