A New Image Encryption Algorithm Based on Chaotic Map
Changzhen Xiong, Jiancheng Zou · Acta Scientiarum Naturalium Universitatis Sunyatseni · 2004
Many digital image encryption algorithms based on chaotic map were presented; most of them use the quantization of coefficients. In finite precision, chaotic map will generate a circulation or an unmovable point, which does not accord with perfect density distributing function. This paper proposes a new encryption algorithm based on chaotic map without transcendental knowledge of orbit distributing. So that people can choose any chaos model, which extends the key space of algorithm. The algorithm reduces iterative number and makes full use of chaotic property of map. This paper also introduces the segmentation mechanism of general baker transformation, which enhances the key space and security of algorithm. The experiment shows that it has the property of key sensitivity, high key space and pixel distributing uniformity.