OOX (Object-oriented Xml) file digital watermark method based on attribute style conversion

A technology of digital watermarking and attributes, which is applied in the direction of electronic digital data processing, special data processing applications, program/content distribution protection, etc., can solve the problems of being vulnerable to attacks, limited watermark redundant information, and less research on text watermarking, and achieves improved Robustness and embedding capacity, improving the effect of poor robustness

CN102930186AInactive Publication Date: 2013-02-13NANJING UNIV OF INFORMATION SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2013-02-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides an OOX (Object-oriented Xml) format text file digital watermark method based on attribute style conversion. Watermark information is embedded by modifying double quotation marks ' ' in an attribute definition of a main file part of OOX file into single quotation marks ' ', so that the watermark information is combined with format information of the file; and the robustness and the embedding capacity of watermark are improved so that an efficient OOX file copyright protection method is realized. Therefore, the digital watermark method based on attribute style conversion, provided by the invention, provides a new key technology for OOX file content authentication and copyright protection, the problem of bad robustness existing in a digital watermark technology all the time is improved, and theoretical principle and the method support are provided for further popularization and application of the digital watermark technology.
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Description

technical field

[0001] The invention belongs to the technical field of computer text copyright protection, in particular to an OOX document digital watermark method based on attribute style transformation. Background technique

[0002] The Office Open XML (OOX) format is a new format standard adopted by the office2007-2010 products released by Microsoft, and it is one of the most popular text formats on the Internet. Since the release of the OOX document, its scope and frequency of use have increased rapidly. Many important confidential documents of enterprises and institutions are stored in this new text document format and spread on the Internet. Lawbreakers copy or even tamper with other people's text materials in large quantities without consent, and claim copyright. This has brought great losses to relevant units and individuals. Facing the increasingly serious crisis of trust, there is an urgent need for effective text copyright protection technology to help people i...

Examples

Embodiment Construction

[0020] In order to make the purpose of the present invention, technical scheme clearer, below in conjunction with figure 1 and figure 2 The OOX document digital watermarking algorithm based on attribute style transformation proposed by the embodiment of the present invention is described in detail.

[0021] The digital watermark method based on attribute style transformation is to embed the watermark information by changing the double quotation mark """" in the attribute definition in the document.xml file of the main document part of OOX document to single quotation mark "''". Table 1 illustrates the correspondence between attribute styles and watermarks. The double quotes in the attribute correspond to watermark information 0, and the single quotes correspond to watermark information 1.

[0022] attribute style

watermark information

0

1

[0023] Table 1 Correspondence between attribute styles and watermarks.

[0024] The digital ...