Research and Implementation of Text Digital Watermarking Based on File Filter Driver

This paper elaborates on adoping both the file filter driver technology and digital watermarking to protect the file and solve the problem of data leakage. Used to develop a filtering driver at the nernel level to encrypt the files, Minifilter technology can offset the lack of robustness of font color algorithm, and achieve the embedding of watermark information in the unformatted text. Based on the analysis of the experimental data, we find that Minifilter has good practicability and effectiveness. Apart from preventing the leakage, it can be used to trace and locate the leakage, giving more comprehensive protection to the digital documents.