An image block encryption algorithm of wavelet domain based on hyperchaostic theory
LI Hong-kai
QIU Guo-yong
Abstract：Aiming at the problem of high complexity of image encryption algorithm at present,a new wave-let domain block encryption method was proposed.First,the algorithm decomposed the original image into multiple different resolution images using DWT(discrete wavelet transform),and the low-frequency coeffi-cients of the image were scrambled by the hyperchaotic system.After IDWT(inverse discrete wavelet trans-form),bitwise XOR was performed on the reconstructured image with a sequence generated using hyper-chaostic system.The experimental results verified that the grey information of the original image was hid-den,this encrypting method had a large space of keys and high safety performance;and the scrambled im-age had good performance of the resisting statistic attack and differential cryptanalysis.
Keywords：image encryptionDWT (discrete wavelet transform)hyperchaostic systemblock encryption
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 67-72 )