Image encryption algorithm based on Hash function and multiple chaotic systems
Jiangfeng Xu · Jisuanji gongcheng yu sheji · 2010
In order to protect image effectively,a multiple chaotic image encryption algorithm based on Hash function and multiple chaotic systems is presented,which implemented image encryption through shuffling and substituting.In the pixel permutation process,Lorenz chaotic system and Hash function is employed.In the process of grey value substituting,an image grey level scrambling algorithm based on polyalphabetic substitution cipher and Logistic chaotic system is proposed,at last,the grey is diffused.Theoretical analyses and simulated experiment show that,the proposed algorithm has excellent performances against attacks,in particular statistical attacks,differential attacks,limited attacks and chosen plain image attack.