TY - JOUR T1 - Watermarking security: a survey JF - Transactions on Data Hiding and Multimedia Security I Y1 - 2006 A1 - Luis Pérez-Freire A1 - Pedro Comesaña A1 - Juan Ramón Troncoso-Pastoriza A1 - Fernando Pérez-González KW - data-hiding KW - security KW - watermarking VL - 4300 ER -