Robust Reversible Database Watermarking Scheme for Local Distortion

To address the problem of excessive data distortion caused by watermark embedding in existing database watermarking methods, a robust and reversible data watermarking scheme with local distortion is proposed. The scheme proposes to use only part of the attribute column data as the watermark carrier to reduce data distortion, while the watermark is encoded using the corrective coding technique to enhance the robustness of the watermark, and the watermark is embedded into the data by the difference expansion technique to achieve reversible data recovery. Experiments based on real data show that the proposed scheme produces less data distortion, the watermark is robust after attacks, and the usability and copyright protection of shared data are enhanced.