Audio Data Hiding Using Octal Modulus Function Based Unsigned Integer Sample Values

Data hiding is proposed as a solution that helps to secure any significant information. These techniques conceal the existence of a secret message that is confidentially inserted into multimedia covers such as text, audio, video, or image. Audio data hiding is a recent research topic which is aimed to securely transfer an imperceptible stego file. This stego is transferred to the destination carrying a high payload. Commonly, schemes in steganography are classified into two domains: time and frequency. In the time domain, varied LSB techniques are proposed but these techniques are known as the simplest algorithms in the field of steganography. In this paper, an audio data hiding algorithm based on octal modulus function is presented. This method is conducted based on modifying the cover samples. The original samples are subtracted by the difference between the secret message digit and the same sample remainder value. Three testing implementations are conducted by changing the base of unsigned integer (uint) function (e.g. uint8, uint16, or uint24) of the cover audio samples. The performance is evaluated regarding both the capacity and quality. This evaluation is performed based on varying the cover samples values using uint8, uint16, and uint24, so SNR values are approximately 32, 80, 129 dB, respectively. The values of SNR are obtained after fully embedding the cover file wherein each sample there are 3 secret bits.