Multiple Image Encryption Technology Based on Logistic Mapping
Wang Lin-juan · Science Technology and Engineering · 2011
The Logistic chaotic sequence is famous for its randomness,the sensitive of the original value and non-repeatability of iteration.A multiple image encryption technology based on scrambling the pixel value of original image and the position of wavelet coefficients are presented.Firstly,the pixel value of original image by using the chaotic sequences based on logistic mapping are modified.Secondly,the pixel value is further scrambled by using diffusion transformation.At last,in order to encrypt the image again,wavelet analysis to improve the performance of encryption are used.The location of wavelet coefficients are changed using another logistic chaotic sequence.An encrypted image is obtained by reconstructing the scrambled wavelet coefficients.The test results show the algorithm disturbs the histogram distribution of original image which enables the encrypted image can resist the statistics attack of known-plaintext.And the algorithm can realize the image encryption with larger key space and good effect.