本文選題：文本數(shù)字水印　切入點(diǎn)：拓?fù)浣Y(jié)構(gòu)　出處：《電子科技大學(xué)》2008年博士論文　論文類型：學(xué)位論文

【摘要】： 近年來,隨著以互聯(lián)網(wǎng)技術(shù)為代表的信息技術(shù)的迅猛發(fā)展,各種文字、圖像、聲音、視頻等媒體的獲取、保存與使用方式發(fā)生了很大的變化。這一方面給人們帶來了極大的方便,但另一方面,未經(jīng)版權(quán)所有人許可對數(shù)字作品的任意復(fù)制、修改等盜版行為也日趨嚴(yán)重。因此,如何在互聯(lián)網(wǎng)環(huán)境下進(jìn)行有效的版權(quán)保護(hù)等信息安全問題,也就成為了重要的研究課題。 在此背景下,數(shù)字水印技術(shù)作為一種新的多媒體信息安全保護(hù)技術(shù)應(yīng)運(yùn)而生。它將隱藏信息嵌入到各種數(shù)字媒體中,結(jié)合傳統(tǒng)的數(shù)據(jù)加密技術(shù)來實(shí)現(xiàn)信息的隱藏通信、訪問控制、版權(quán)保護(hù)等功能,當(dāng)前,該領(lǐng)域的研究與應(yīng)用已經(jīng)相當(dāng)深入。但令人遺憾的是,由于文字媒體本身的一些特點(diǎn),作為數(shù)字水印技術(shù)重要組成部分的文本數(shù)字水印技術(shù)的進(jìn)展卻是相對滯后的,這與文字是人類傳播信息最主要方式的現(xiàn)實(shí)情況形成了很大的反差。 本文的工作就是要針對現(xiàn)有文本數(shù)字水印技術(shù)存在的薄弱環(huán)節(jié),進(jìn)行新型的文本數(shù)字水印技術(shù)及其典型應(yīng)用的研究。主要的研究內(nèi)容涉及文本數(shù)字水印嵌入算法、水印檢測方法、系統(tǒng)實(shí)現(xiàn)框架、抗攻擊技術(shù)及典型應(yīng)用等該領(lǐng)域的關(guān)鍵問題,取得了如下創(chuàng)新性成果: 1)提出了一種基于字符拓?fù)浣Y(jié)構(gòu)的文本數(shù)字水印技術(shù),通過改變字符或者字符串字形的拓?fù)浣Y(jié)構(gòu),設(shè)計(jì)出語義上相同的字符(串)的多種字形,并對這些字形的拓?fù)浣Y(jié)構(gòu)進(jìn)行恰當(dāng)?shù)木幋a,利用字符(串)的拓?fù)浣Y(jié)構(gòu)來攜帶數(shù)字水印信息。同時(shí),給出了魯棒性和視覺影響試驗(yàn)方法、結(jié)果,并分析了水印的抗攻擊性能。 2)引入圖論作為1)所述的文本數(shù)字水印技術(shù)的數(shù)學(xué)基礎(chǔ),將字符字形映射為圖論中的“圖”,對“圖”或者“圖”的特征量進(jìn)行恰當(dāng)?shù)木幋a,利用這些編碼來表示數(shù)字水印。同時(shí),給出了基于圖論的水印嵌入、檢測方法的數(shù)學(xué)模型和詳細(xì)實(shí)現(xiàn)過程。 3)提出了一種以符號的冗余編碼表示隱藏信息的隱藏?cái)?shù)據(jù)通信技術(shù),以及與該方法相關(guān)的文本數(shù)字水印嵌入、檢測技術(shù)和載體文件的顯示技術(shù)。這些技術(shù)包括:將符號編碼成冗余數(shù)字代碼的若干方法;隱藏通信的數(shù)據(jù)加載與分離方法;特定字體文件的設(shè)計(jì)方法;若干對嵌入水印信息的載體文件進(jìn)行顯示的方法。在此基礎(chǔ)上,利用冗余編碼的原理,還提出了一種利用索引值嵌入隱藏信息的圖像數(shù)字水印算法。 4)結(jié)合基于“字符拓?fù)浣Y(jié)構(gòu)”和“冗余編碼”的文本數(shù)字水印技術(shù)的特點(diǎn),提出了文本數(shù)字水印系統(tǒng)完整解決方案。給出了兩種特殊的字體設(shè)計(jì)方法,重點(diǎn)描述了在統(tǒng)一的框架體系中,實(shí)現(xiàn)在電子文件和印刷品文件上嵌入、檢測數(shù)字水印的技術(shù)。 5)提出了一種新的隱藏通信方法,其原理是改變字符圖形與字符編碼在各種編碼標(biāo)準(zhǔn)規(guī)范中已確定的標(biāo)準(zhǔn)映射關(guān)系,采用自定義的方法進(jìn)行字符圖形與字符編碼的映射,從而使得電子文件顯示出的字符圖形與電子文件的內(nèi)在編碼分別構(gòu)成顯式通信信道和隱藏通信信道,這兩種信道可以獨(dú)立地進(jìn)行通信。應(yīng)用該隱藏通信技術(shù)制作成自包含字符圖形和編碼信息的電子文件,便于利用現(xiàn)有互聯(lián)網(wǎng)搜索引擎按照文件的屬性進(jìn)行在線搜索。 6)針對同步攻擊這一困擾擴(kuò)頻水印技術(shù)的難題,研究了一類基于字符特征的文本數(shù)字水印技術(shù)的編碼映射規(guī)則,給出了相應(yīng)的擴(kuò)頻水印加載與檢測模型。利用字符語義在水印加載與檢測過程中具備的良好魯棒性,通過載體字符產(chǎn)生偽隨機(jī)代碼,最終生成具有同步錯誤修正能力的自適應(yīng)擴(kuò)頻文本水印,仿真實(shí)驗(yàn)表明其抗同步攻擊性能得到了顯著的提高。 7)提出了一種新的數(shù)字內(nèi)容網(wǎng)絡(luò)出版發(fā)行機(jī)制,其主要特點(diǎn)是用戶可免費(fèi)獲取數(shù)字內(nèi)容,但必須強(qiáng)制性地觀看廣告,廣告與數(shù)字產(chǎn)品關(guān)聯(lián)綁定。描述了這種機(jī)制的系統(tǒng)體系結(jié)構(gòu)及相關(guān)技術(shù)協(xié)議,給出了實(shí)現(xiàn)該機(jī)制所需的內(nèi)容加密、水印嵌入、屏幕字符替換等關(guān)鍵技術(shù)。該機(jī)制為平衡數(shù)字內(nèi)容價(jià)值鏈中各方的利益提供了一種新的解決途徑。
[Abstract]:In recent years, with the rapid development of Internet technology, the information technology represented a variety of text, images, sound, video and other media access, great changes have taken place in the preservation and use. This has brought great convenience to people, but on the other hand, without any copyright license for digital the works of replication, modification of piracy has become more and more serious. Therefore, how to protect the copyright and other information security problems effectively in the Internet environment, has become an important research topic.
Under this background, digital watermarking technology as a new kind of multimedia information security technology came into being. It will hide the information into digital media, communication, hidden combined with traditional data to realize information encryption technology and access control, copyright protection and other functions, the current research and application in this field but has been very thorough. Unfortunately, due to some characters of the media itself, as progress is the text digital watermarking technology is an important part of the digital watermarking technology is lagging behind, this is the reality of human communication of information the main way to form a great contrast with the text.
The work of this paper is to aim at the weak link existing text digital watermarking technology, research on text digital watermarking technology model and its typical applications. The main content of this study relates to a text digital watermarking algorithm, the watermark detection method, system framework, key problems of anti attack technology and the typical applications of the field, are as follows innovative achievements:
1) proposed a text digital watermarking technology character based on topological structure, by changing the topology character string or character, design a semantic same character (string) of the glyphs and the topological structures of these glyphs are using the character encoding, (string) topology to carry digital watermarking information. At the same time, the results are robust and visual impact test method, and analyzes the anti attack capability of the watermark.
2) 1) introduction of graph theory as the mathematical basis of the text digital watermarking technology, the character glyph mapping for the term "graph", proper encoding of the "map" or "map" feature, use the encoding to represent digital watermarking. At the same time, the watermark embedding is proposed based on graph theory the detection method, the mathematical model and the realization of the process in detail.
3) presents a redundancy encoding symbols of hidden data communication technology of information hiding, and associated with the method of text digital watermarking, display technology, detection technology and vector files. These technologies include: the symbol encoding method into several redundant digital code; loading and separation method of data hiding communication; the design method of specific font file; display method of vector file embedded watermark information. On this basis, using the principle of redundancy encoding, proposes a binary image digital watermarking algorithm to embed hidden information by using the index.
4) based on the character of topological structure and redundancy encoding of text digital watermarking technology, proposed a complete text digital watermarking system solution is given. Two kinds of special font design method, described in the uniform framework, the realization of the embedded in electronic and print files. Detection of digital watermarking technology.
5) proposed a new hidden communication method, its principle is the standard mapping change character graphic and character encoding standard in various encoding has been identified, the mapping method of custom character graphic and character encoding, the encoding characters and graphics and electronic documents so that electronic documents show the respectively. The explicit communication channel and hidden communication channel, the two channel can independently communicate. Application of the self made electronic file containing the character graphics and encoding information hiding communication technology, to facilitate the use of the existing Internet search engine according to the properties of the files to search.
6) in order to solve the problem of synchronization attacks that plagued the spread spectrum watermarking technology, study a class of mapping rules encoding text digital watermarking technology based on character features, gives a spread spectrum watermarking loading and corresponding detection models. Using the character semantic good robustness in embedding and detecting processes for generating pseudo-random code through. Vector of character, the generated text watermarking adaptive spread spectrum synchronization with error correction capability, simulation results show that the anti synchronization attack performance has been significantly improved.
7) proposed a new digital content network publishing mechanism, its main characteristic is that users can free access to digital content, but should be forced to watch the ads, advertising and digital products related to binding. The description of the system architecture of this mechanism and related technical agreement, the implementation of the mechanism for content encryption the key technology of watermark embedding, screen character replacement. This mechanism provides a new solution for the balance of the digital content value chain parties in interests.

【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2008
【分類號】：TP309.7

【引證文獻(xiàn)】

相關(guān)期刊論文 前2條

1 蔡菲菲;劉洋;尹香蘭;;一種基于word文檔的文本水印技術(shù)研究[J];計(jì)算機(jī)科學(xué);2012年S3期

2 沈曉艷;崔新春;于建峰;;數(shù)字水印技術(shù)在數(shù)字圖書館中的應(yīng)用現(xiàn)狀分析[J];山東圖書館學(xué)刊;2011年05期

相關(guān)博士學(xué)位論文 前3條

1 吳戈;基于數(shù)字水印的文本信息隱藏方法的研究[D];長春理工大學(xué);2011年

2 曾高榮;數(shù)字水印的魯棒性評測建模和算法研究[D];北京交通大學(xué);2010年

3 孔鴻濱;語義Web技術(shù)的本體安全性研究[D];云南大學(xué);2012年

相關(guān)碩士學(xué)位論文 前4條

1 伍洋;基于文本基本特征的數(shù)字水印的研究[D];長春理工大學(xué);2011年

2 張芙蓉;數(shù)字水印在多媒體教學(xué)資源版權(quán)保護(hù)中的應(yīng)用研究[D];中南大學(xué);2009年

3 胡瑩;基于字體顏色的文本數(shù)字水印的研究與應(yīng)用[D];西安電子科技大學(xué);2011年

4 鐘征燕;應(yīng)用于數(shù)字版權(quán)保護(hù)的文本數(shù)字水印技術(shù)研究[D];北京郵電大學(xué);2013年

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本文編號：1557370