A reversible acoustic steganography for integrity verification

Authors:
Xuping Huang;Akira Nishimura;Isao Echizen
Affiliations:
School of Multidisciplinary Sciences, The Graduate University for Advanced Studies, Tokyo, Japan;Department of Information Systems, Tokyo University of Information Sciences, Chiba, Japan;School of Multidisciplinary Sciences, The Graduate University for Advanced Studies, Tokyo, Japan and National Institute of Informatics, Tokyo, Japan
Venue:
IWDW'10 Proceedings of the 9th international conference on Digital watermarking
Year:
2010

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Abstract

Advanced signal-processing technology has provided alternative countermeasures against malicious attacks and tampering with digital multimedia, which are serious issues. We propose a reversible acoustic steganography scheme to verify the integrity of acoustic data with probative importance from being illegally used. A hash function is used as a feature value to be embedded into original acoustic target data as a checksum of the data's originality. We compute the target original signal with an Integer Discrete Cosine Transform (intDCT) that has low computational complexity. Embedding space in the DCT domain is reserved for feature values and extra payload data, enabled by amplitude expansion in high-frequency spectrum of cover data. Countermeasures against overflow/underflow have been taken with adaptive gain optimization. Experimental evaluation has shown the distortion caused by embedding has been controlled under a level that is perceptible. Lossless hiding algorithm ensures this scheme is reversible.