ABSTRACT
This chapter proposes a generic attack for removing the watermark with minimum distortion if the detector is publicly available. It describes the pitfalls of the detectors when the detector is publicly available. The chapter introduces the generic attack, which aims at removing the watermark with minimum distortion. It also proposes possible implementations of the attack for the correlator and quantization-based detectors. The chapter also describes the new detector structure with a fractal decision boundary and provides a practical implementation of it. It also provides an overview of the results that show that the distortion is essentially similar to the original detector. The deployment of multimedia protection algorithms to practical systems has moved to the standardization and implementation phase. The chapter analyzes the security of the watermark detection schemes. Asymmetric detectors were suggested to make the problem of estimating the secret key for unauthorized parties more difficult.
