TY - GEN
T1 - Security of spread-spectrum-based data hiding
AU - Pérez-Freire, Luis
AU - Moulin, Pierre
AU - Pérez-González, Fernando
PY - 2007
Y1 - 2007
N2 - This paper presents an information-theoretic analysis of security for data hiding methods based on spread spectrum. The security is quantified by means of the mutual information between the observed watermarked signals and the secret carrier (a.k.a. spreading vector) that conveys the watermark, a measure that can be used to bound the number of observations needed to estimate the carrier up to a certain accuracy. The main results of this paper permit to establish fundamental security limits for this kind of methods and to draw conclusions about the tradeoffs between robustness and security. Specifically, the impact of the dimensionality of the embedding function, the host rejection, and the embedding distortion in the security level is investigated, and in some cases explicitly quantified.
AB - This paper presents an information-theoretic analysis of security for data hiding methods based on spread spectrum. The security is quantified by means of the mutual information between the observed watermarked signals and the secret carrier (a.k.a. spreading vector) that conveys the watermark, a measure that can be used to bound the number of observations needed to estimate the carrier up to a certain accuracy. The main results of this paper permit to establish fundamental security limits for this kind of methods and to draw conclusions about the tradeoffs between robustness and security. Specifically, the impact of the dimensionality of the embedding function, the host rejection, and the embedding distortion in the security level is investigated, and in some cases explicitly quantified.
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U2 - 10.1117/12.704176
DO - 10.1117/12.704176
M3 - Conference contribution
AN - SCOPUS:34548267133
SN - 0819466182
SN - 9780819466181
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Proceedings of SPIE-IS and T Electronic Imaging - Security, Steganography, and Watermarking of Multimedia Contents IX
PB - SPIE
T2 - Security, Steganography, and Watermarking of Multimedia Contents IX
Y2 - 29 January 2007 through 1 February 2007
ER -