Traditional encryption algorithms are inefficient when applied to image encryption because image data have the characteristics of\nlarge data sizes and strong correlations between adjacent pixels. The shortcomings of the traditional Data encryption standard\n(DES) encryption algorithm when applied to image encryption are analyzed, and a new image encryption algorithm based on the\ntraditional DES encryption algorithm model, chaotic systems, DNA computing, and select cipher-text output is proposed. Select\ncipher-text output selects cipher image with the biggest entropy, and it can increase the randomness of cipher image and reduce\nthe risk of encryption system being broken down. This algorithm overcomes the shortcomings of high computational complexity\nand inconvenient key management that the traditional text encryption algorithm has when applied to image encryption. The\nexperimental results show that the security of this algorithm is verified by analyzing the information entropy, image correlation of\nadjacent pixels and other indexes. At the same time, this algorithm passes the noise attack test and the occlusion attack test, so it\ncan resist common attacks.
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