Image encryption circuit with chaotic symbol dynamics
Zhangquan Wang · Journal of Circuits and Systems · 2011
A circuit to realize the image encryption with 1-D piece-wise chaotic symbol dynamics is proposed.Based on the algorithm of chaotic symbol dynamics,some different longer chaotic bit sequences could be got from only one shorter chaotic sequence with addition、subtraction、multiplication and division modules.According to the theory of linear algebra,a primary matrix is formed by interchanging the rows of an identity matrix.To realize the image encryption,the encryption algorithm uses the chaotic sequence to determine the algorithm of interchanging the rows,then uses the primary matrix which is determined by the different chaotic sequence to scramble the position and the value of each pixel.Experimental result shows that the algorithm is good at the image scrambling.It is expected to be applied into the image encryption transmission or preprocessing of secret images in digital watermarking.