Discontinuity of SVD Embedding Mapping Used for Watermarks

Kazuo Ohzeki¹, Yuki Seo², and Engyoku Gi¹

¹ISE, Shibaura Institute of Technology, 3-7-5,Toyosu, Koutouku, Tokyo, Japan
ohzeki@sic.shibaura-it.ac.jp
m108048@sic.shibaura-it.ac.jp

²Liberal Arts 307, Fukasaku, Minumaku, Saitama, Japan
yukis@sic.shibaura-it.ac.jp

Abstract. This paper presents a verification test on a quasi-one-way characteristic of SD watermarking. Norm of distance between tow matrices is one of measures for evaluating degree of computational burden against reverse analysis.The norm distance shows a kind of nonlinearity and even non-continous phenominon, in spite of the norm is smooth quadratic function.

Keywords: SVD, one-way function, mapping, norm, eigen-value

LNCS 5872, p. 4 f.

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