Steganography introduction of additional information into samples of digital audio signals

The article is devoted to the description of the method of hidden transmission of information in a WAV sound file. The hidden transmission (or storage) of classified information can be used to protect copyright (the introduction of watermarks), the hidden transfer of passwords, keys, messages, files, etc. A common approach for the hidden transmission of information in multimedia containers is to use only the lowest digits of digital data (the so-called LSB method). The paper describes the way of introducing additional information into sound files, in which not only the last (lower) bits of counting are used, but also older ones. The experimental substantiation of the possibility of such an introduction is given. At the same time, the dependence of the auditory perception of a person is established, depending on the number of the used sample of the sample and the time interval for the emergence of information semplov. The increase of the cryptographic strength of the described approach is achieved due to the pseudo-random choice of the sound channel, the reference number, the number of the discharge used.