A Double-Image Encryption Scheme Based on Amplitude-Phase Encoding and Discrete Complex Random Transformation

In this paper, a novel double image encryption scheme based on amplitude-phase encoding and discrete complex random transform (DCRT) is proposed. First, two images are merged into a plural matrix by precoding, and the synthetic signal is modulated by the phase mask which is calculated from Chen chaotic sequences generated by using the self-adapting parameter as initial values. Then, the modulated signal is encrypted by amplitude-phase encoding and the DCRT. The final cipher-text is decomposed into amplitude and phase to obtain two encrypted images. Experimental results and performance analysis show that the proposed encryption scheme can effectively resist different attacks such as the differential attack, statistical attack, and so on, and it can be used for the secure communications.

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