Data Hiding and Transmission Over Occupied Audio Channels Using Deterministic Chaos

The efficiency of the algorithm for hiding and transmitting digital information simultaneously with audio signals is analyzed by the method of spreading the spectrum using chaotic signals. The efficiency of the proposed algorithm is estimated by the amount of distortion introduced into the cover audio, as well as by the reliability of extracting the embedded information, which is characterized by the value of the error probability. It is shown that in order to extract pseudorandom sequence with high reliability from cover audio, preference should be given to the mother Daubechies and Simlet wavelets. Requirements for the numerical values of the embedding parameters and the parameters of the generators of chaotic processes used to expand the spectrum are formulated. It was found that to ensure the required reliability of extracting the built-in pseudorandom sequence, it is necessary to ensure the discrepancy between the parameters of the chaos generators on the transmitting and receiving sides of less than 0.15.