The most powerful attacks against watermarking arecollusion attacks, in which multiple attackers (the ‘coalition’) combine their differently watermarked versions of the same content; the observed differences point to the locations of the hidden marks and allow for a targeted attack. Collusion-resistant...
Saddle points and minimax solutions in game and control theory are well-known and have many important applications. Their definitions are actually quite special if compared to their counterparts in critical point theory. Let X and Y be Hilbert spaces and H=X×Y. A point u*=(x*,y*)∈H is...
This paper studies the saddle point problem of polynomials. We give an algorithm for computing saddle points. It is based on solving Lasserre’s hiera