Abstract
A new image encryption algorithm with low correlation coefficient and high information entropy based on dynamic DNA coding and hyper-chaotic Lorenz system is proposed in this paper. In order to generate the initial values in hyper-chaotic system to construct DNA sequence matrix and dynamic S-box, this algorithm use the SHA-256 algorithm to generate a common key. Then use the SCAN mode and the S-box to scramble the pixel position. In order to scramble the pixel values, this paper uses the DNA sequence matrix to calculate cipher-text. Theoretical analysis and simulation results show that the algorithm improves the sensitivity of key space, and the encryption system can resist statistical attacks and differential attack.
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