Watermarking in gyrator domain using an asymmetric cryptosystem
Sunanda Vashisth, Anil Kumar Yadav, Hukun Singh, Kehar Singh · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2015
A watermarking scheme is proposed based on optical asymmetric cryptography using double random phase encoding in the gyrator transform domain. It is based on the phase and amplitude truncation during the encryption process. The scheme is validated through computer simulations showing the scheme's sensitivity to decryption keys and orders of the gyrator transform. The occlusion and noise attacks have also been analysed. The proposed scheme is significantly resistant to both these attacks.