Abstract
AAC (Advanced Audio Coding) audio files are increasingly used, gradually replacing MP3 format files in many audio/video services, due to their low compression rate and good audio signal quality. Due to these properties, AAC audio files are frequently used for embedding information hidden by steganographic methods. This paper presents an analysis of the steganographic schemes used for audio files in AAC format, but also of the detecting and extracting methods of embedded information (steganalysis). The aim is to evaluate these steganographic and steganalytical systems, which will lead to new research directions.
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