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Recently, a novel nonlinear encryption system based on joint transform correlator (JTC) in the Gyrator domain (GD) was proposed. The encryption system uses a fully nonlinear nonzero order JTC and Gyrator transform (GT). The decryption system is based on two successive GTs. The proposed system preserves the good quality of the decrypted image while increases the overall security of the complete process...
In this work, we present the integration of the photon counting technique (PhCT) with an encryption system in the Gyrator domain (GD) for secure image authentication. The encryption system uses two random phase masks (RPMs), one RPM is defined at the spatial domain and the other RPM is defined at the GD, in order to encode the image to encrypt (original image) into random noise. The rotation angle...
In this paper, we have presented a novel double color image encryption/decryption technique with RGB pixel shuffling, which not only provides high security to both images but also enhances robustness in the cryptosystem against cross talk disturbances. A modification, in generating a complex image using both the color images, has been proposed for successful decoding in the gyrator (GT) domain which...
Gyrator transform is a new tool for image encryption. In this paper, the security of image encryption based on random phase encoding in gyrator transform domains was analyzed. For image encryption with single random phase encoding and gyrator transform, the operation of random phase encoding only changes the phase angle of the original secret image instead of the amplitude of the image. So, the encryption...
A new method for Discrete Gyrator Transform (DGT) based image encryption and decryption using Double Random Phase Mask (RPM) is proposed. In the present work encryption and decryption has been done using Gyrator Transform (GT) a kind of discrete algorithm using convolution operation. The proposed method uses DGT to reduce the computational load. The robustness of the proposed algorithm to blind decryption...
In this paper, we propose an algorithm for image encryption using chaotic maps and gyrator transform. Chaotic Logistic and tent maps are used to generate the required random bit sequences. Pixels of the plain image are encrypted through gyrator transform, and then it is partitioned into 8 bit map planes. Later, the bits of each plane are substituted according to random bit matrix that is the products...
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