Symmetric Image Encryption Scheme Based on Chaotic System
Zhibin Li · Jisuanji gongcheng · 2008
This paper presents a new image encryption scheme based on composite chaotic system. An external key and two logistic systems are employed for encryption, which shuffle positions and substitute grey values of pixels of image. In the process of grey value substituting, it adopts sub key induced by external key to take samples. Through adding information of shuffle position matrix into the process of grey value substituting, processes of shuffle positions and substitute grey values are mixed in a simple and effective way, which improves coupling property of the encryption system.