Double-image sharing encryption based on associated fractional Fourier transform and gyrator transform
马金鹏 Jinpeng, 刘正君 Zhengjun Liu, 郭忠义 Zhongyi Guo, 刘树田 Shutian Liu · Chinese Optics Letters · 2010
We present a novel method for realizing double-image encryption algorithm by combining the images in different transform domains. Two original images are encrypted into two interim images by fractional Fourier transform and gyrator transform, respectively. The two encrypted images can be obtained by means of the addition and subtraction of the two interim images. This is defined as a double-image sharing scheme, in which the original images are encrypted into two parts. The original images cannot be recovered only with any one of the two interim images. Numerical simulation experiments demonstrate the validity of the algorithm.