A Novel Image Encryption Crypto-System Based on Cascade Chaotic Systems and DNA Encoding
Keywords:
Image encryption. Chaos. DNA encoding. Tent-Logistic map. Logistic mapAbstract
In this paper, we proposed an efficient image encryption algorithm based on cascade chaotic Maps theory and DNA encoding rules. The Tent Map and Logistic Map are employed to generate all the parameters required by the proposed algorithm, while DNA encoding technology functions as an auxiliary tool. The proposed algorithm consists of the following steps: First, the Tent-Logistic Map is used to generate a key image, where its pixels are generated by chaotic sequences; second, both the plain image and the key image are encoded using DNA rules row by row, with different rows encoded according to various rules determined by the Logistic Map. After that, the encoded key image is used to perform DNA operations on the encoded plain image, row by row, to obtain an intermediate image, and the specific operation for each row is selected by the Logistic Map. Then, the intermediate image is decoded as the plain image for the next step. Finally, the above steps are repeated column-wise to generate the final cipher image. The experimental results and analysis indicate that the proposed algorithm is robust against typical attacks and exhibits strong security characteristics.
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