Optical image encryption based on computational ghost imaging

This paper proposes an optical image encryption method based on RNA encoding and computational ghost imaging. Four sets of random sequences obtained from Chen's hyperchaotic system are used to construct the speckle matrix required for calculating the ghost imaging system. The initial values of the hyper chaotic system is provided by encrypted images, by which one image corresponds to one encryption is achieved. RNA codons are used to encode and calculate the chaotic sequence, increasing the key space and improving the security of the system. The speckle matrix and target image are inputted into the computational ghost imaging system, as RNA encoding and codon substitution on the image received by the barrel detector are performed to obtain an encrypted image. This method effectively reduces the size of transmitted keys, improves transmission efficiency, and enhances the security of the system. It has certain reference and reference significance for optical based image transmission and encryption.