Robust watermarking based on dual-random phase encryption against collusion attacks
Lixuan Zhu, Bin Xu · 2023
Digital watermarking was an important method for video copyright protection, but it may face inter-frame linear attack in two kinds of collusion scenarios. By analyze attack principle and the essence of the problem, an improved double random phase encryption technology based on the principle of optical holography was proposed as a method against inter-frame collusion attacks. The experimental results show that the improved method has stronger convergence and adjustment of inter-frame redundancy than the prototype. After applying noise interference and geometric attack, the average peak signal-to-noise ratio (PSNR) of the first and last frames of frame averaging and frame cutting are decreasing by 23.12%, and the average amplitude of PSNR between the extreme values of frame reconstruction and frame cutting is 2.88%, which is significantly better than the 42.20% of the comparison method. It shows that the method can ensure stronger robustness of the watermark when dealing with common noise interference and attacks. In summary, the proposed method satisfies the evaluation criteria and is superior to the comparison method, ensuring that the co-conspirator cannot use data redundancy to obtain collusion rules and implement inter-frame attacks, which has the effect of resistance.