TY - CONF T1 - Disclosing secrets in watermarking and data hiding T2 - Third Wavila Challenge (WaCha) Y1 - 2007 A1 - Luis Pérez-Freire A1 - Fernando Pérez-González KW - data-hiding KW - security KW - watermarking JF - Third Wavila Challenge (WaCha) T3 - ECRYPT proceedings series from the Otto-von-Guericke University, Magdeburg, Germany CY - Saint-Malo, France ER -