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Secure forensic marking in DWT-DFRNT dual domain

In this paper, we proposed a secure audio forensic marking algorithm through the process of embedding information into the discrete wavelet transformation-discrete fractional random transformation (DWT-DFRNT) domain using the quantization method. We hid information in the QR code, encoded it with the block code that we developed. The block code and QR code improve the detection performance by bit error correction which is generated at the detection process. The DWT used for making a robust domain against to several attacks and the DFRNT was applied to increase the algorithm security by randomly scrambling the information so that they could be embedded in unpredictable locations in a certain frequency space. The experimental result showed that the information contained in the QR code was accurately extracted from the forensic mark within the error correction range. The experiment results also showed that the security of the algorithm was ensured, as a tiny change in the DFRNT or the scrambling-converted parameters led to extraction failure.