Abstract
A color image encryption algorithm is designed by using the affine transform in the gyrator transform domains. The RGB components of the color image are converted into the real part and the imaginary part of a complex function by employing the affine transform. Subsequently the complex function is encoded and transformed in gyrator domain. The gyrator transform is performed twice to enhance the security of this encryption algorithm. The parameters in the affine transform and the gyrator transform are regarded as the key in the encryption algorithm. Some numerical simulations are made to test the validity and capability of the proposed color encryption algorithm.
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