Blind watermarking algorithm of double keys based on Markov chain Monte Carlo sampling
XIAO Jiawei1,ZHANG Li1,2,LUO Jingyun1
1. College of Information Engineering, Shenzhen University, Shenzhen Guangdong 518060, China; 2. Shenzhen Key Laboratory of Modern Communication and Information Processing, Shenzhen Guangdong 518060, China
Abstract：In order to improve the security of watermarking algorithm, a robust blind watermarking based on two forms of key was proposed. Firstly, the watermark was encrypted by a key, then matrix Q was consisted of the first singular value of each block carrier and block Discrete Wavelete Transform (DWT) again to acquire four subbands, the k-th watermark bit was chosen to be embedded in the k-th block's low-frequency, horizontal, vertical and high-frequency subbands of matrix Q by Markov Chain Monte Carlo (MCMC) sampling of four subbands and record the current key of embedded subband. It not only made watermark bit randomization, but also improved the safety of the watermark algorithm. The experimental results show that the proposed watermarking has strong robustness against conventional attacks under the condition of satisfying invisibility, meanwhile, it enhances the security of the watermark algorithm, which is embedded with a different key by MCMC sampling in the watermark embedding process.
萧嘉慰 张力 罗静云. 基于马尔可夫链蒙特卡罗采样的双密钥盲水印算法[J]. 计算机应用, 2014, 34(2): 469-472.
XIAO Jiawei ZHANG Li LUO Jingyun. Blind watermarking algorithm of double keys based on Markov chain Monte Carlo sampling. Journal of Computer Applications, 2014, 34(2): 469-472.
2014, Vol. 34 
