CN102930186A - OOX (Object-oriented Xml) file digital watermark method based on attribute style conversion - Google Patents
OOX (Object-oriented Xml) file digital watermark method based on attribute style conversion Download PDFInfo
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- CN102930186A CN102930186A CN2012104248416A CN201210424841A CN102930186A CN 102930186 A CN102930186 A CN 102930186A CN 2012104248416 A CN2012104248416 A CN 2012104248416A CN 201210424841 A CN201210424841 A CN 201210424841A CN 102930186 A CN102930186 A CN 102930186A
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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.
Description
Technical field
The invention belongs to computer version copyright protection technology field, espespecially a kind of OOX document digital watermark method based on the conversion of attribute pattern.
Background technology
Office Open XML(OOX) form is the format standard that the office2007-2010 product of Microsoft company issue adopts, and it is one of most popular text formatting on the internet.Since the issue of OOX document, its usable range and frequency of utilization increase rapidly, and the important classified papers data of a lot of enterprises and institutions is all preserved with this new text document form, and propagates on the internet.The lawless person is without the agreement massive duplication even distort other people text information, and declares to have copyright.This has brought great loss for relevant unit and individual.In the face of increasingly serious trust crisis; in the urgent need to effective text copyright protection technology; auxiliary people identify the real owner of text copyright, combat copyright piracy and unwarranted distorting, and guarantee the public information order, fight crime, safeguard judicial justice and news creditability.Text digital water mark technology is the text safety innovation that developed recently gets up, and has broad application prospects at aspects such as copyright protection, the trackings of divulging a secret.
Text is a kind of important means of information interchange, and the redundant information that can carry watermark owing to it is very limited, and easily under attack, thus relatively less to the research of Text Watermarking, and all do not have research how to protect the copyright of OOX format file.We have proposed a kind of OOX document digital watermark method based on the conversion of attribute pattern, come embed watermark information by the attribute pattern that changes relevant parts in the OOX text document bag, can effectively protect the copyright of OOX format file.
Summary of the invention
The present invention proposes a kind of digital watermark method based on the conversion of attribute pattern; by being revised as single quotation marks " ' ' ", the double quotation marks " " " " in the OOX document main document parts attribute definition comes embed watermark information; so that watermark information combines with the format information of document; improve robustness and the embedding capacity of watermark, thereby realized a kind of effective OOX document copy-right protection method.
The present invention is for solving above technical matters by the following technical solutions:
A kind of OOX document digital watermark method based on the conversion of attribute pattern, described method comprises watermark embedding method and watermark extracting method, comprises the following steps: respectively
The watermark embedding method concrete steps are:
(1) at first reads main document parts document.xml file in the OOX format file bag, and extract attribute and property value under each node in the described document.xml file;
(2) for each property value, read a watermark information: if 0, then keep the double quotation marks in the former attribute constant;
If 1, the double quotation marks of then revising in the former attribute is single quotation marks;
(3) repeating step (2) until all watermark informations embed and to finish;
(4) add the main document parts document.xml of embed watermark in former OOX document package;
The watermark extracting method step is:
(5) at first read main document parts document.xml file in the OOX format file bag, and extract attribute and property value under each node in the described document.xml file;
(6) for each attribute, extract a pair of double quotation marks " " " " or single quotation marks " " " information: if double quotation marks then increases Plus "0" in watermark information in the property value; If single quotation marks then increases " 1 " in watermark information;
(7) repeating step (6) is until all digital watermark informations extractions are finished in the described document.xml file.
Beneficial effect of the present invention: the present invention proposes a kind of OOX document digital watermark method based on the conversion of attribute pattern; by being revised as single quotation marks " ' ' ", the double quotation marks " " " " in the OOX document main document parts attribute definition comes embed watermark information; so that watermark information combines with the format information of document; improve robustness and the embedding capacity of watermark, thereby realized a kind of effective OOX document copy-right protection method.The present invention has been for OOX content of text authentication and copyright protection provide new gordian technique, improved the problem of the poor robustness that digital watermark technology exists always, for further applying of digital watermark technology provides theoretical foundation and method support.
Description of drawings
Fig. 1 watermark embeds process flow diagram.
Fig. 2 watermark extracting process flow diagram.
Embodiment
For making purpose of the present invention, technical scheme more clear, below in conjunction with Fig. 1 and Fig. 2 the OOX document digital watermarking algorithm based on the conversion of attribute pattern that the embodiment of the invention proposes is elaborated.
Digital watermark method based on the conversion of attribute pattern is to come embed watermark information by the double quotation marks " " " " in the attribute definition in the OOX document main document parts document.xml file is revised as single quotation marks " ' ' ".Table 1 for example understands the corresponding relation of attribute pattern and watermark, the corresponding watermark information 0 of the double quotation marks in this attribute, the corresponding watermark information 1 of single quotation marks.
| The attribute pattern | Watermark information |
| <w:t?xml:space="preserve"> | 0 |
| <w:t?xml:space=‘preserve’> | 1 |
The corresponding relation of table 1 attribute pattern and watermark.
Digital Watermarking Embedded Algorithm based on the conversion of attribute pattern is as follows:
Input: initial carrier document D, original watermark information M, private key k; Output: the hidden document S that writes;
Step 1: utilize private key k and rivest, shamir, adelman RSA, original watermark information is encrypted, the watermark information I':I'=E (k, I) after obtaining encrypting, and convert it to binary coding H=H
1H
2... H
i...;
Step 2: calculate the binary coding length l en (H) of H, and len (H) is converted to binary data is attached to the H front and obtains A ';
Step 3: utilize the XML document analytic technique, from the ZIP bag of initial carrier document D, read all the elements of main document parts " document.xml " to C:C=C
1C
2... C
i...;
Step 4: from C:C=C
1C
2... C
i... all properties information of a pair of paragraph element of middle extraction (paragraph element) is to R=R
1R
2... R
i...;
Step 5: successively from R=R
1R
2... R
i... in extract a pair of double quotation marks " " " " information;
Step 6: from A ', read a watermark information: if " 0 " then keeps original double quotation marks " " " " constant; If " 1 ", then replacing original double quotation marks " " " " is single quotation marks " ' ' ";
Step 7: from C:C=C
11C
2... C
i... all properties information of a pair of run element of middle extraction (run element) is to R=R
1R
2... R
i...;
Step 8: successively from R=R
1R
2... R
i... in extract a pair of double quotation marks " " " " information;
Step 9: from A ', read a watermark information: if " 0 " then keeps original double quotation marks " " " " constant; If " 1 ", then replacing original double quotation marks " " " " is single quotation marks " " ";
Step 10: repeating step 4 is to step 9, until the watermark information behind the coding embeds fully.
Digital watermarking extraction algorithm based on the conversion of attribute pattern is as follows:
Input: document S with watermarked information, private key k; Output: watermark information M;
Step 11: utilize the XML document analytic technique, from the ZIP bag of document S with watermarked information, read all the elements of main document parts " document.xml " to C:C=C
1C
2... C
i...;
Step 12: from C:C=C
1C
2... C
i... all properties information of a pair of paragraph element of middle extraction (paragraph element) is to R=R
1R
2... R
i...;
Step 13: successively from R=R
1R
2... R
i... in extract a pair of double quotation marks " " " " or single quotation marks " " " information: if double quotation marks then increases Plus "0" in watermark information M; If single quotation marks then increases " 1 " in watermark information M;
Step 14: from C:C=C
1C
2... C
i... all properties information of a pair of run element of middle extraction (run element) is to R=R
1R
2... R
i...;
Step 15: successively from R=R
1R
2... R
i... in extract a pair of double quotation marks " " " " or single quotation marks " " " information: if double quotation marks then increases Plus "0" in watermark information M; If single quotation marks then increases " 1 " in watermark information M;
Step 16: repeating step 12 to step 15 until in the described document.xml file all digital watermark informations be extracted;
Step 17: utilize private key k and rivest, shamir, adelman RSA, M is decrypted to watermark information, the information I after obtaining deciphering.
The above only is the better embodiment of the present invention.But protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses, and the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.
Claims (1)
1. the OOX document digital watermark method based on the conversion of attribute pattern is characterized in that, described method comprises watermark embedding method and watermark extracting method, comprises the following steps: respectively
The watermark embedding method concrete steps are:
(1) at first reads main document parts document.xml file in the OOX format file bag, and extract attribute and property value under each node in the described document.xml file;
(2) for each property value in the described document.xml file, read a watermark information: if 0, then keep the double quotation marks in the former attribute constant; If 1, the double quotation marks of then revising in the former attribute is single quotation marks;
(3) repeating step (2) until all watermark informations be embedded into fully in the described document.xml file;
(4) add the main document parts document.xml of embed watermark in former OOX document package;
The watermark extracting method step is:
(5) at first read main document parts document.xml file in the OOX format file bag, and extract attribute and property value under each node in the described document.xml file;
(6) for each attribute in the described document.xml file, extract a pair of double quotation marks " " " " or single quotation marks " ' ' " information: if double quotation marks then increases Plus "0" in watermark information in the property value; If single quotation marks then increases " 1 " in watermark information;
(7) repeating step (6) is until all digital watermark informations extractions are finished in the described document.xml file.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103294959A (en) * | 2013-05-29 | 2013-09-11 | 南京信息工程大学 | Text information hiding method resistant to statistic analysis |
| CN105046159A (en) * | 2015-06-18 | 2015-11-11 | 中国科学院信息工程研究所 | Modification identifier based OOX text document privacy information detection method |
| CN109670281A (en) * | 2017-10-16 | 2019-04-23 | 北京大学 | The treating method and apparatus of electronic document |
| CN109993681A (en) * | 2019-04-10 | 2019-07-09 | 兰州大学 | A kind of digital watermark method of the OOX format file based on color attribute value transformation |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030105950A1 (en) * | 2001-11-27 | 2003-06-05 | Fujitsu Limited | Document distribution method and document management method |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030105950A1 (en) * | 2001-11-27 | 2003-06-05 | Fujitsu Limited | Document distribution method and document management method |
Non-Patent Citations (1)
| Title |
|---|
| 周莉等: "一种基于XML文档的数字水印方案", 《湖南大学学报（自然科学版）》, vol. 34, no. 5, 31 May 2007 (2007-05-31), pages 2 - 3 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103294959A (en) * | 2013-05-29 | 2013-09-11 | 南京信息工程大学 | Text information hiding method resistant to statistic analysis |
| CN103294959B (en) * | 2013-05-29 | 2015-11-25 | 南京信息工程大学 | A kind of text information hiding method of anti-statistical study |
| CN105046159A (en) * | 2015-06-18 | 2015-11-11 | 中国科学院信息工程研究所 | Modification identifier based OOX text document privacy information detection method |
| CN105046159B (en) * | 2015-06-18 | 2018-04-03 | 中国科学院信息工程研究所 | OOX text document privacy information detection methods based on modified logo symbol |
| CN109670281A (en) * | 2017-10-16 | 2019-04-23 | 北京大学 | The treating method and apparatus of electronic document |
| CN109993681A (en) * | 2019-04-10 | 2019-07-09 | 兰州大学 | A kind of digital watermark method of the OOX format file based on color attribute value transformation |
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Application publication date: 20130213 |