%0 Conference Paper %B International Workshop on Digital Watermarking (IWDW) %D 2011 %T Witsenhausen's counterexample and its links with multimedia security problems %A Pedro Comesaña %A Fernando Pérez-González %A Chaouki T. Abdallah %K control %K Multimedia security %K Witsenhausen's counterexample %B International Workshop on Digital Watermarking (IWDW) %C Atlantic City, USA %8 October %G eng