Christoph Busch, Stephen D. Wolthusen. Sensitivity labels and invisible identification markings in human-readable output. 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 149-157, SPIE, 2002. [doi]
Abstract is missing.