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Secure Delivery of Compressed Audio by Compatible Bitstream Scrambling

The recent technological revolutions in both networking technology (the Internet) and highly efficient perceptual audio coding algorithms (e.g., MPEG audio) have stimulated attractive new applications as well as a considerable amount of music piracy. In order to enable a controlled distribution of multimedia content, classical data encryption techniques are proposed to provide a -secure envelope- around the multimedia pay load by means of ciphering all or parts of it. This paper presents a novel approach of securing compressed digital audio by integrating both ciphering and source coding methods into a single scheme.

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