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Proceedings Paper

Detection in quantization-based watermarking: performance and security issues
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Paper Abstract

In this paper, a novel method for detection in quantization-based watermarking is introduced. This method basically works by quantizing a projection of the host signal onto a subspace of smaller dimensionality. A theoretical performance analysis under AWGN and fixed gain attacks is carried out, showing great improvements over traditional spread-spectrum-based methods operating under the same conditions of embedding distortion and attacking noise. A security analysis for oracle-like attacks is also accomplished, proposing a sensitivity attack suited to quantization-based methods for the first time in the literature, and showing a trade-off between security level and performance; anyway, this new method offers significant improvements in security, once again, over spread-spectrum-based methods facing the same kind of attacks.

Paper Details

Date Published: 21 March 2005
PDF: 13 pages
Proc. SPIE 5681, Security, Steganography, and Watermarking of Multimedia Contents VII, (21 March 2005); doi: 10.1117/12.587730
Show Author Affiliations
Luis Perez-Freire, Univ. de Vigo (Spain)
Pedro Comesana-Alfaro, Univ. de Vigo (Spain)
Fernando Perez-Gonzalez, Univ. de Vigo (Spain)

Published in SPIE Proceedings Vol. 5681:
Security, Steganography, and Watermarking of Multimedia Contents VII
Edward J. Delp III; Ping W. Wong, Editor(s)

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