Abstract
This paper introduces a new diffusion and confusion scheme for encrypting an image by utilizing Deoxyribonucleic Acid (DNA) sequence and chaotic maps. First, the plain image is transformed into three components and each component is confused by DNA encoded to generate DNA matrices for a colour image. Next, the DNA colour image is permuted using a Chen hyper-chaotic map. In addition, a keystream is produced by a combination of new Beta and Sine chaotic maps. Conclusively, to obtain the cipher image, DNA XOR operation between the generated keystream and permuted DNA image is performed. The results indicate that the proposed scheme is secure against several attacks and provides large secret keyspace and very responsive to slight changes to the secret key.
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