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Information hiding technique is a new kind of secret communication technology. The majority of today's information hiding systems uses multimedia objects like audio. Embedding secret messages in digital sound is usually a more difficult process. Varieties of techniques for embedding information in digital audio have been established. In this paper, the authors will attend the general principles of hiding secret information using audio technology, and an overview of functions and techniques. The fast improvement of the Internet and the digital information revolution caused major changes in the overall culture.
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