文献类型：期刊文献

英文题名：An image encryption scheme based on time-delay and hyperchaotic system

作者：Ye, Guodong[1,2];Wong, Kwok-Wo[2]

机构：[1]Guangdong Ocean Univ, Coll Sci, Zhanjiang 524088, Guangdong, Peoples R China;[2]City Univ Hong Kong, Dept Elect Engn, Kowloon Tong, Hong Kong, Peoples R China

年份：2013

卷号：71

期号：1-2

起止页码：259

外文期刊名：NONLINEAR DYNAMICS

收录：SCI-EXPANDED(收录号：WOS:000312787000020)、、EI(收录号：20130215889751)、Scopus(收录号：2-s2.0-84871951104)、WOS

基金：The work described in this paper was fully supported by a grant from CityU (Project No. 7008106) and the Natural Science Foundation of Guangdong Ocean University of P.R. China (No. 1212334).

语种：英文

外文关键词：Time-delay; Hyperchaotic system; Image encryption; Position index permutation

外文摘要：In this paper, a novel image encryption scheme based on time-delay and hyperchaotic system is suggested. The time-delay phenomenon is commonly observed in daily life and is incorporated in the generation of pseudo-random chaotic sequences. To further increase the degree of randomness, the output of the hyperchaotic system is processed before appending to the generated sequence. A novel permutation function for shuffling the position index, together with the double diffusion operations in both forward and reverse directions, is employed to enhance the encryption performance. Experimental results and security analyses show that the proposed scheme has a large key space and can resist known-plaintext and chosen-plaintext attacks. Moreover, the encryption scheme can be easily modified to adopt other hyperchaotic systems under the same structure.