A joint digital watermarking and encryption method
Michela Cancellaro, Federica Battisti, Marco Carli, Giulia Boato, Francesco G. B. De Natale, Alessandro Neri · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2008
In this paper a joint watermarking and ciphering scheme for digital images is presented. Both operations are performed on a key-dependent transform domain. The commutative property of the proposed method allows to cipher a watermarked image without interfering with the embedded signal or to watermark an encrypted image still allowing a perfect deciphering. Furthermore, the key dependence of the transform domain increases the security of the overall system. Experimental results show the effectiveness of the proposed scheme.