A Quantum Image Encryption Algorithm Based on Quantum Image Geometric Transformations

In this paper, the encryption on quantum image will be realized by the combination of kinds of quantum image geometric transforms. Before designing of the encryption algorithm, we put forward two fundamental important contents: quantum gray-scale image expression and quantum gray-scale geometric transformations both of which are the necessities for algorithm. The smallest storing unit for quantum gray-scale image is pixel; quantum image geometric transforms are mainly implemented by quantum circuits. On these basics, quantum image encryption could be finally achieved which will make the result entirely different from the original one to complete the encryption.