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Security analysis of transformed-key asymmetric watermarking system
2006
IEEE Signal Processing Letters
Asymmetric watermarking schemes have been widely discussed recently. Transformed-key asymmetric watermarking (TKAW) system is one of the schemes, which was proposed by Choi et al. This letter discusses the weaknesses of TKAW. In TKAW, the inner product of the received signal and public key almost equals to zero. As a result, it cannot resist projection attack. To prove this point, we will demonstrate how to find the most relevant unwatermarked signal for a given watermark embedded signal and
doi:10.1109/lsp.2005.863677
fatcat:3tjy4tlxonfm7ikxkvvg7ffkca