Optical image encryption based on singular value decomposition ghost imaging and fractional chaotic mapping

Optical information technology is the combination of optical information processing and information security, which is one emerging information security technology in recent decades. In this paper, an optical image encryption technology is proposed based on singular value decomposition ghost imaging and fractional chaotic system, which uses singular value decomposition to modulate the structured light matrix, and uses fractional chaotic system to scramble the obtained structured light matrix. The scrambled structured light is used to accomplish ghost imaging to obtain the ciphertext image in the information transmission. In decryption, only the correct key can be used to reconstruct the plaintext image information. The outstanding advantage of this method is that the fractional chaotic system is highly sensitive to the initial parameters, which enhances the importance of the key in the decryption process, that is, the security and robustness of the encryption method are effectively improved. Therefore, this method has great application value in the fields of image encryption and image transmission.