Image Encryption of Multiple Keys Method Based on Chaotic Maps
Yan Cheng, Shu Yang, Shifeng Li · 2010
This paper presents a multiple keys method of image encryption on chaotic maps. Different from other existing methods, two chaotic maps and multiple keys are used to encrypt the image. Firstly, the Arnold map permutes the image as preprocessing using the 1stkey, and then the permuted image is divided into non-overlap n*n blocks which are permuted by random sequences whose random seed is created by logistic map whose initial value and parameters are the 3rdkeys, and the size of block can be considered as 2ndkey. At last the obtained results XOR with the binary result created by logistic map the initial value of which is the 4thkeys. The experiments prove that the scheme is robust to the signal processing procedure such as noise, compression and have a super security.