Discontinuity of SVD Embedding Mapping Used for Watermarks
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.
KeywordsSVD one-way function mapping norm eigen-value
- 1.Ohzeki, K., Sakurai, M.: SVD-Based Watermark with Quasi-One-Way Operation by Reducing a Singular Value Matrix Rank. In: Proc. The Firste-forensics, Adelade, Australia, Technicalsession B4. Watermarking, 1 (January 22, 2008)Google Scholar
- 2.Qi, X., Brimley, B., Brimley, G.: Anadaptive QIM- and SVD-based digital image water marking scheme in the wavelet domain. In: Proc. ICIP, October 2008, pp. 421–424 (2008)Google Scholar
- 3.Ohzeki, K., Gi, E.: Quasi-One-Way Function and Its Application stoImage Watermarking. In: Proc. MMAP in IMCSIT, Wisła, Poland, pp. 501–508 (October 2008)Google Scholar