On the security of robust reference logo watermarking scheme in Fractional Fourier Transform domain

Rapid progression of Internet technology and related services has enhanced the simplicity of access to digital information through web, leading to the problem of associated copyright to be confined. The problem of rightful ownership has direct to giving the digital watermarking as an evident solution. The paper has been proposed to emphasize the security issues in new robust reference logo watermarking scheme in Fractional Fourier Transform domain. Recently Bhatnagar and Raman have provided a robust reference logo watermarking algorithm for digital images based on singular value decomposition. Through this paper we have enlighten the issue of false positive problem in reference watermarking algorithm. We have extracted a false watermark by using our proposed algorithm from the reference watermarking scheme in Fractional Fourier Transform domain. Mathematical analysis and experimental results has been used to support our conclusion.