Audio public key watermarking technique

This paper presents the application of the promising public key watermarking method to the audio domain. Its detection process does not need the original content nor the secret key used in the embedding process. It is the translation, in the watermarking domain, of a public key pair cryptosystem. We start to build the detector with some basic assumptions. This leads to a hypothesis test based on probability likelihood. But real audio signals do not satisfy the assumption of a Gaussian probability density function. Moreover, the use of an advanced human perception model to hide the watermark makes the detection issue a tough problem. Our works result in a new detection process offering a good test´s power for a low probability of false alarm