Encryption is a usually employed technique to protect the image data from unauthorized access. In this paper, a novel digital image encryption algorithm with a 192-bit key based on the hybrid of chaotic maps and DNA encoding is proposed. When designing the algorithm, we take advantage of the instinct properties of chaos system. The original image is firstly permuted by Arnolds cat Map to obtain the better confusion, then it is encoded into a DNA image by using DNA encoding. After that, each nucleotide of DNA image is transformed into its base pair by means of the complementary rule and XORed with a hyper-chaotic binary sequence. Experimental example and security analyses results show the proposed algorithm effective and secure.
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