Exactly reversible method of hiding information in audiofile preserving container histogram

A new method of hiding information inside audio file-container has been described in the paper. This method is robust to steganalysis based on histogram comparison. Methods merits are its exact reversibility and capability of its realization in real time. But it doubles the size of the output file, and some high frequency components appear in audio file stego. The results of algorithm simulation and container capacity estimation have been given. The method can also be used for embedding watermarks in audio files.