Media type: Electronic Conference Proceeding Title: Countermeasure for collusion attacks against digital watermarking Contributor: Steinebach, Martin; Zmudzinski, Sascha Published: SPIE, 2006 Published in: SPIE Proceedings (2006) Extent: Language: Not determined DOI: 10.1117/12.642189 ISSN: 0277-786X Origination: Footnote: