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This work proposes the use of the Hermite Transform (HT) for imprinting audio files with hidden information. One of the most important aspects of this kind of concealment derives from the amount of data that a host file (audio, images, data, or video) can hold. In this particular case, both the host and the hidden files are aud io files. The amount of information that can be hidden- with the suggested technique-occupies half the length of the host file. Furth ermore, the use of the Hermite Transform on audio files helps improve the algorithm performance. Experimental results show that our proposal is efficient and effective, because the audio file concealment is imperceptible to human hearing. Performance of our proposal was assessed using correlation and peak signal to noise ratio. The results strengthen the effectiveness of the method.

Steganography in Audio Files by Hermite Transform