Attacks on digital audio watermarks and countermeasures

We present a classification of attacks against digital audio watermarks and possible countermeasures. We present the categorization of attacks into the four different groups of removal, desynchronization, embedding and detection attacks. The logic behind this arrangement is based on the effect the attack should produce during the detection of the audio watermark and is discussed in detail. For each class of attacks an exhaustive explanation is provided with corresponding links to other media types. If countermeasures are known for the attacks they are described in each group.