Yun Q. Shi Hyoung-Joong Kim Stefan Katzenbeisser Digital Watermarking, 6th International Workshop, IWDW 2007, Guangzhou, China, December 3-5, 2007, Proceedings 5041 2008 http://dx.doi.org/10.1007/978-3-540-92238-4 978-3-540-92237-7 IWDW Lecture Notes in Computer Science Springer db/conf/iwdw/iwdw2007.html