Abstract
A color image encryption scheme based on DNA encoding and a hyperchaotic system is proposed. First, the plaintext image is converted into three DNA matrices, and the original image pixels are shuffled by the DNA encoding and chaotic sequence, then the two DNA matrices are separately exchange of DNA fragments in rows and columns. The chaotic sequence determines the matrices and DNA fragments that need to be exchanged, which can resist statistical attacks well, and then the S-box is generated according to the DNA random code and the chaotic sequence, which maps the scrambled matrix and finally recombines the three matrices to obtain the ciphertext. The simulation experiment shows that the image encryption system has good security and can resist various attacks.
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