Methods for data embedding into an audio file without changing the data and audio file structures under inverse transformation

A method for data embedding into an audio file-container is presented. The method is attack resistant, since it is based on comparison of histograms. The results of simulation of the method algorithms are also presented. The respective container’s capacity is estimated. The advantages of the presented method are as follows: it is precisely reversible and implemented in real time. But as a payment for these advantages, the data volume increases by two times and the high-frequency components appear in the audio file-stego with respect to an empty file.