文献类型：期刊文献

英文题名：An Image Encryption Algorithm Based on Time-Delay and Random Insertion

作者：Huang, Xiaoling[1];Ye, Guodong[1]

机构：[1]Guangdong Ocean Univ, Fac Math & Comp Sci, Zhanjiang 524088, Peoples R China

年份：2018

卷号：20

期号：12

外文期刊名：ENTROPY

收录：SCI-EXPANDED(收录号：WOS:000454282000082)、、Scopus(收录号：2-s2.0-85058968491)、WOS

基金：This work was fully supported by the National Natural Science Foundations of China (No. 61602124, No. 61702116), the Science and Technology Planning Project of Guangdong Province of China (No. 2017A010101025), the Natural Science Foundations of Guangdong Province of China (No. 2016A030310333), the Program for Scientific Research Start-up Funds of Guangdong Ocean University of China (No. R17037), the Special Funding Program for Excellent Young Scholars of Guangdong Ocean University of China (No. HDYQ2017006), and the Supporting funding Projects of Guangdong Ocean University of China (No. P15238, No. P16084).

语种：英文

外文关键词：image encryption; time-delay; random insertion; information entropy; chaotic map

外文摘要：An image encryption algorithm is presented in this paper based on a chaotic map. Different from traditional methods based on the permutation-diffusion structure, the keystream here depends on both secret keys and the pre-processed image. In particular, in the permutation stage, a middle parameter is designed to revise the outputs of the chaotic map, yielding a temporal delay phenomena. Then, diffusion operation is applied after a group of random numbers is inserted into the permuted image. Therefore, the gray distribution can be changed and is different from that of the plain-image. This insertion acts as a one-time pad. Moreover, the keystream for the diffusion operation is designed to be influenced by secret keys assigned in the permutation stage. As a result, the two stages are mixed together to strengthen entirety. Experimental tests also suggest that our algorithm, permutation- insertion-diffusion (PID), performs better when expecting secure communications for images.