Inlaying method and device of digital watermarks in text documents

Abstract

The invention relates to an inlaying method and device of digital watermarks in text documents. The method comprises the steps that electronic form text documents are converted to EMF documents, the converted initial EMF documents are opened, document header parameter information is used for setting up corresponding target EMF documents, all GDI functions and parameter information of the GDI functions in the initial EMF documents are all searched, whether the DGI functions are TEXTOUT is judged, if yes, all font information is read and watermark information is inlaid, and then the GDI functions are copied to the target EMF documents, if not, the DGI functions are directly copied to the target EMF documents, and after all the initial EMF documents are processed, all target EMF documents inlaid with the watermark information are subjected to the final output conversion operation. According to the method and device, the problem of watermark information inlaying of various electronic form text documents and paper text documents is solved, and safety monitoring and controlling, source tracing and content protection of important text documents are achieved.

Description

technical field [0001] The invention belongs to the technical field of document protection, and relates to a digital watermark embedding method in a text document, in particular to a digital watermark embedding method and device in an EMF enhanced metafile (Enhanced Metafile, EMF). Background technique [0002] With the rapid arrival of the era of knowledge economy, the role of knowledge in the competitive advantage of modern enterprises is unprecedentedly prominent, and the carrier of knowledge - electronic documents, has become the most valuable and important strategic resource in the operation of modern enterprises. Also in the office environment of government departments and enterprises and institutions, electronic documents have become an indispensable carrier for information exchange and knowledge transfer. Since the contents of documents are easily obtained and tampered with illegally during the dissemination of document information, the protection of important docume...

AI Technical Summary

Problems solved by technology

[0008] The present invention provides a method and device for embedding digital watermarks in text documents, which are used to solve the problem in the prior art that text object data in text documents in various electronic formats cannot be easily obtained, and further solve the problem of various electronic format text documents. and watermark information embedding in paper text documents, and finally achieve the purpose of security prevention, traceability and content protection for important text documents

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