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CLC number: O43

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Received: 2006-01-06

Revision Accepted: 2006-03-22

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Journal of Zhejiang University SCIENCE A 2006 Vol.7 No.8 P.1431-1435


Optical encryption with cascaded fractional wavelet transforms

Author(s):  BAO Liang-hua, CHEN Lin-fei, ZHAO Dao-mu

Affiliation(s):  Department of Physics, Zhejiang University, Hangzhou 310027, China; more

Corresponding email(s):   baolh001@163.com, zhaodaomu@yahoo.com

Key Words:  Wavelet transform (WT), Cascaded fractional wavelet transform (CFWT), Encryption, Decryption

BAO Liang-hua, CHEN Lin-fei, ZHAO Dao-mu. Optical encryption with cascaded fractional wavelet transforms[J]. Journal of Zhejiang University Science A, 2006, 7(8): 1431-1435.

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author="BAO Liang-hua, CHEN Lin-fei, ZHAO Dao-mu",
journal="Journal of Zhejiang University Science A",
publisher="Zhejiang University Press & Springer",

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%A BAO Liang-hua
%A CHEN Lin-fei
%A ZHAO Dao-mu
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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2006.A1431

T1 - Optical encryption with cascaded fractional wavelet transforms
A1 - BAO Liang-hua
A1 - CHEN Lin-fei
A1 - ZHAO Dao-mu
J0 - Journal of Zhejiang University Science A
VL - 7
IS - 8
SP - 1431
EP - 1435
%@ 1673-565X
Y1 - 2006
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.2006.A1431

On the basis of fractional wavelet transform, we propose a new method called cascaded fractional wavelet transform to encrypt images. It has the virtues of fractional Fourier transform and wavelet transform. Fractional orders, standard focal lengths and scaling factors are its keys. Multistage fractional Fourier transforms can add the keys easily and strengthen information security. This method can also realize partial encryption just as wavelet transform and fractional wavelet transform. Optical realization of encryption and decryption is proposed. Computer simulations confirmed its possibility.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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