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,
机构:
North China Elect Power Univ, Sch Control & Comp Engn, Beijing 102206, Peoples R ChinaNorth China Elect Power Univ, Sch Control & Comp Engn, Beijing 102206, Peoples R China
Li, Chunmeng
Yang, Xiaozhong
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North China Elect Power Univ, Inst Informat & Comp, Sch Math & Phys, Beijing 102206, Peoples R ChinaNorth China Elect Power Univ, Sch Control & Comp Engn, Beijing 102206, Peoples R China
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Northeastern Univ, Informat Sci Teaching & Res Sect, Qinhuangdao 066004, Hebei, Peoples R ChinaNortheastern Univ, Informat Sci Teaching & Res Sect, Qinhuangdao 066004, Hebei, Peoples R China
Zhao, Tieyu
Yuan, Lin
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Zhejiang Normal Univ, Coll Math & Comp Sci, Jinhua 321004, Zhejiang, Peoples R ChinaNortheastern Univ, Informat Sci Teaching & Res Sect, Qinhuangdao 066004, Hebei, Peoples R China
Yuan, Lin
Chi, Yingying
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Northeastern Univ, Informat Sci Teaching & Res Sect, Qinhuangdao 066004, Hebei, Peoples R ChinaNortheastern Univ, Informat Sci Teaching & Res Sect, Qinhuangdao 066004, Hebei, Peoples R China