Jana Dittmann, Martin Steinebach, Lucilla Croce Ferri. Watermarking protocols for authentication and ownership protection based on timestamps and holograms. In Edward J. Delp III, Ping Wah Wong, editors, Security and Watermarking of Multimedia Contents IV, San Jose, CA, USA, January 19, 2002. Volume 4675 of SPIE Proceedings, pages 240-251, SPIE, 2002. [doi]
Abstract is missing.