Image encryption based on the multiple-order discrete fractional cosine transform

被引：34
|
作者：
Wu, Jianhua [1 ]
Zhang, Lin [1 ]
Zhou, Nanrun [1 ]
机构：
[1] Nanchang Univ, Dept Elect Informat Engn, Nanchang 330031, Peoples R China
来源：
OPTICS COMMUNICATIONS | 2010年 / 283卷 / 09期
基金：
中国国家自然科学基金;
关键词：
Discrete fractional cosine transform; Multiple-order; Image encryption; Discrete fractional Fourier transform; Information security; FOURIER-TRANSFORM; DOMAIN; PLANE;
D O I：
10.1016/j.optcom.2009.12.066
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A novel scheme for image encryption based-on the multiple-order discrete fractional cosine transform (MCDFrCT) is proposed. The DFrCT has a similar relationship with the discrete fractional Fourier transform (DFrFT). Not only has the DFrCT many useful properties similar to the conventional discrete cosine transform, but it also has another property, namely its fraction, or its transform order. The image to be encrypted is transformed with the multiple-order DFrCT using a random row cipher key vector and a random column key vector successively, and the corresponding cipher key vectors of decryption are also very sensitive. The transmission of the encrypted image with the algorithm of the multiple-order DFrCT is faster due to its reality. The digital simulation results proved the validity and safety of this algorithm. (C) 2009 Elsevier B.V. All rights reserved,
引用
收藏
页码：1720 / 1725
页数：6
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