The game of embedding and detecting spread spectrum watermarks under the estimation attack
Darko Kirovski, H.S. Malvar · 2003
We show the theory behind the interaction of parameters involved in the game of marking and detecting direct sequence spread-spectrum (SS) watermarks (WM) under the assumption that the WM estimation attack is carried out prior to WM detection. As an important contribution, we define a modification to the traditional SS WM detector that enforces the adversary to add amount of noise proportional in amplitude to the recorded signal in order to successfully remove a SS WM.