Robust and Multilayer Excel Document Watermarking for Source Tracing
Excel documents are widely used in finance,scientific research,data analysis and statistical reporting,and play an in-creasingly important role in education and training,online offices and many other scenarios,but they also pose security risks such as unauthorised use,infringement and information leakage.To protect the security of digital content of Excel documents,there is a vital need to develop more secure and reliable document watermarking algorithms.This paper proposes a source tracing multi-layer watermarking algorithm for Excel documents with good invisibility and robustness based on the Excel document format.By embedding multilayer watermark information into the cell style and RGB color values of the border of Excel documents,it can clarify the document distribution chain in practical application scenarios,trace the source of document leakage and locate the per-son responsible for the leakage.The proposed algorithm can be used to reduce the occurrence of information leakage.Experimen-tal comparisons show that the proposed method is imperceptible to watermarks,robust to a wide range of common attacks,and supports multilayer watermark embedding of up to five layers.Compared with other document format-based watermarking algo-rithms,the proposed algorithm has better watermark invisibility,stronger robustness and a wider range of applications.
万方数据
维普
