A Robust and Secure Block-SVD based Embedding of Encrypted Watermark in Digital Images using RDWT

Sachin Gaur, Vinay Kumar Srivastava
2017 International Journal of Security and Its Applications  
Digital image watermarking has been proposed for treatment of the problem of copyright protection, authentication of digital data and ownership identification. In this paper a robust and secure digital image watermarking method based on Redundant Discrete Wavelet Transform (RDWT) and block-by-block SVD (Singular Value Decomposition) is presented. The watermark image is encrypted (scramble watermark) by using Cipher block chaining (CBC) to enhance its privacy and robustness. In the proposed
more » ... e the gray scale host image is transformed by RDWT and is also segmented into non-overlapping blocks of each sub-band, and then a scramble watermark image is embedded in the singular values of these blocks in each sub-band. This scheme provides security by embedding encrypted watermark in block-by-block manner and has large capacity due to redundancy in RDWT domain and also preserves high imperceptibility due to SVD properties. The advantage of the given scheme is that it is much more robust to attacks such as cropping, compression, Gaussian noise. Experimental results show that this method performs better in terms of capacity, security and robustness than other block-based methods presented before.
doi:10.14257/ijsia.2017.11.1.21 fatcat:db33hfoarncvvldt3ffmc3cjrm