Method for Information Protection of Digital Documents Using Invisible Digital Watermarks and Its Implementation

Abstract

Currently, many digital data transmitted over the Internet are often attacked by intruders. This leads to information leakage and creates serious problems in the field of copyright protection, property rights protection, authentication, etc. In recent years, the technology of digital watermarks for application in content protection problems has attracted great attention from users and researchers. A particularly demanding area of digital marking is the marking of documents, which are very sensitive to any changes of text. This article reviews the current trends in watermarking and watermarking technologies on digital documents to identify state-of-the-art techniques and their limitations. Also, a general architecture of the algorithm for applying and extracting reliable and imperceptible watermarks into a document, based on changing text glyphs, is being developed to solve the problem of tracking the source of information leakage. Using this algorithm, we can extract watermark information from document screenshots. Compared to previous algorithms for watermarking documents, the proposed scheme guarantees content-independent embedding, as well as the invisibility of the digital mark. In addition, the proposed marking scheme shows a high extraction accuracy.

Keywords

• document marking
• watermark
• glyph
• invisibility
• leak detection