Image Row-column Scrambling Encryption Scheme Based on Ordered Index of Parametric Switching Chaotic System
Hua Zi-zhen · Journal of Chengdu University of Information Technology · 2014
To improve the encryption performance of the image encryption scheme,this paper proposes an image encryption scheme using improved parametric switching chaotic system. The proposed scheme firstly selects the Sine mapping, Cos mapping or Tent mapping adaptively according to the sequence of Logistic mapping to generate the random sequence of parametric switching chaotic system. Secondly generates scrambling indexes of rows and columns with chaotic ordered indexes by sorting the chaotic sequence with the same number of rows and columns. Thirdly,scrambles the image in row and column by using the scrambling indexes. Lastly,obtains the encrypted image by encrypting the rest patulous chaotic sequence and image pixels in bit with xor operation. This can improve the key space. Experimental results show that the proposed scheme achieves larger key space and better attacks resistance capability.