基于圖像空間域信息隱藏關(guān)鍵技術(shù)研究
發(fā)布時(shí)間：2018-07-13 08:55
【摘要】：隨著互聯(lián)網(wǎng)技術(shù)和多媒體信息技術(shù)的飛速發(fā)展,計(jì)算機(jī)已經(jīng)走進(jìn)了千家萬(wàn)戶(hù)�；ヂ�(lián)網(wǎng)使信息交換的形式多種多樣同時(shí)不受空間限制,使得數(shù)字多媒體信息在網(wǎng)上傳播越來(lái)越便捷,給人們的工作和生活帶來(lái)了很大的便利。然而,互聯(lián)網(wǎng)是把雙刃劍,給人們工作和生活帶來(lái)便利的同時(shí)也帶來(lái)信息安全隱患。傳統(tǒng)的信息安全防護(hù)措施是通過(guò)密碼學(xué)對(duì)傳輸?shù)拿魑男畔⑦M(jìn)行加密處理形成一堆無(wú)法直接閱讀識(shí)別的密文信息,從而達(dá)到不被非法分子直接獲取的目的�，F(xiàn)階段網(wǎng)絡(luò)傳輸中的新問(wèn)題催生出學(xué)者們對(duì)信息隱藏(InformationHiding)技術(shù)研究的熱潮。信息隱藏技術(shù)不同于傳統(tǒng)的密碼學(xué)技術(shù),傳統(tǒng)的密碼學(xué)技術(shù)僅僅做到信息的內(nèi)容不被非法接收者所識(shí)別,信息隱藏是將機(jī)密信息隱藏到一般的數(shù)字多媒體(視頻、圖像、音頻、文檔文件等)中,隱藏有機(jī)密信息的媒體看起來(lái)和其他沒(méi)有隱藏機(jī)密信息的一般媒體相同,從而不容易被非法分子注意和發(fā)覺(jué),容易逃過(guò)非法分子的破解和攻擊。本文主要針對(duì)目前圖像空間域信息隱藏技術(shù)中存在的問(wèn)題進(jìn)行了較深入的研究。具體研究?jī)?nèi)容如下:(1)本文首先分析并總結(jié)了國(guó)內(nèi)外在空間域內(nèi)各種圖像信息隱藏技術(shù)的特點(diǎn)。其次,為進(jìn)一步提高現(xiàn)有的圖像信息隱藏技術(shù)的魯棒性、機(jī)密信息的藏量(Capacity)以及改善隱密圖像的質(zhì)量,主要做了以下幾個(gè)方面的研究:1)為了提高機(jī)密信息的藏量,本文提出了一種基于modulo 3策略的圖像信息隱藏方案。本方案通過(guò)對(duì)載體圖像中每個(gè)像素的灰度值進(jìn)行加一減一操作達(dá)到隱藏兩個(gè)三進(jìn)制機(jī)密信息的目的,仿真實(shí)驗(yàn)結(jié)果表明本方案在載體圖像的藏量和魯棒性方面都有所提高。2)為了提高隱密圖像的質(zhì)量,本文根據(jù)人類(lèi)視覺(jué)系統(tǒng)(HVS)對(duì)圖像的平滑區(qū)域比較敏感的特性,提出了一種基于動(dòng)態(tài)基數(shù)數(shù)制系統(tǒng)(VRNS)的自適應(yīng)圖像信息隱藏方案。該方案首先把機(jī)密信息分段并轉(zhuǎn)換成動(dòng)態(tài)基數(shù)數(shù)制系統(tǒng)表示,然后把轉(zhuǎn)換后的機(jī)密信息優(yōu)先藏在載體圖像中比較復(fù)雜的區(qū)域從而達(dá)到提高隱密圖像視覺(jué)質(zhì)量的目的。最后仿真實(shí)驗(yàn)顯示本方案不僅獲得了一個(gè)更好的視覺(jué)質(zhì)量效果,而且提高了魯棒性。(2)圖像信息隱藏技術(shù)已經(jīng)發(fā)展的很迅速,但是目前存在的空間域內(nèi)數(shù)字圖像信息隱藏技術(shù)普遍存在一個(gè)問(wèn)題——難抵御數(shù)學(xué)統(tǒng)計(jì)分析。由于在空間域進(jìn)行信息隱藏改變了原有圖像像素間的正態(tài)分布特性,使用數(shù)學(xué)統(tǒng)計(jì)分析工具很容易識(shí)破一幅數(shù)字圖像中是否藏有機(jī)密信息。信息隱藏技術(shù)得以發(fā)展最主要的原因是其偽裝性不易被非法分子重點(diǎn)關(guān)注,如果很容易被數(shù)學(xué)統(tǒng)計(jì)分析工具攻擊,信息隱藏技術(shù)的意義就沒(méi)有那么重要了。所以本文提出的兩個(gè)改進(jìn)方案均引入了SPAM攻擊測(cè)試,最后實(shí)驗(yàn)結(jié)果證明本文改進(jìn)的兩種方案更能抵抗SPAM攻擊,魯棒性都有所提高。
[Abstract]:With the rapid development of Internet technology and multimedia information technology, computers have entered thousands of households. The Internet makes the forms of information exchange various and not restricted by space, making digital multimedia information more and more convenient on the Internet, which brings great convenience to people's work and life. However, the Internet is a double-edged sword, which brings convenience to people's work and life, but also brings hidden trouble of information security. The traditional information security protection measures are to encrypt the transmitted plaintext information through cryptography to form a pile of ciphertext information which can not be read directly, so as to achieve the purpose of not being directly obtained by illegal elements. At present, the new problems in network transmission give rise to the upsurge of the research on information hiding technology. The information hiding technology is different from the traditional cryptography technology. The traditional cryptography technology only makes the content of the information not recognized by the illegal receiver. The information hiding is to hide the confidential information to the general digital multimedia (video, image, audio). In documents and files, the media with secret information looks the same as other media without secret information, so it is not easy to be noticed and detected by illegal elements, and easy to escape the cracking and attack of illegal elements. This paper mainly focuses on the problems existing in image spatial domain information hiding technology. The main contents of this paper are as follows: (1) this paper firstly analyzes and summarizes the characteristics of various image information hiding techniques in spatial domain at home and abroad. Secondly, in order to further improve the robustness of the existing image information hiding technology, the capacity of the secret information and the quality of the secret image, we mainly do the following research: 1) in order to improve the volume of the secret information, This paper presents an image information hiding scheme based on modulo 3 strategy. The scheme can hide two ternary secret information by adding and subtracting the gray value of each pixel in the carrier image. The simulation results show that the proposed scheme improves both the volume and robustness of the carrier image. In order to improve the quality of the hidden image, the human visual system (HVS) is more sensitive to the smooth region of the image in order to improve the quality of the hidden image. An adaptive image information hiding scheme based on dynamic cardinality system (VRNS) is proposed. In this scheme, the secret information is segmented and transformed into a dynamic cardinal number system, and then the converted secret information is first stored in the complex region of the carrier image, so as to improve the visual quality of the hidden image. Finally, the simulation results show that this scheme not only achieves a better visual quality effect, but also improves the robustness. (2) Image information hiding technology has been developed very quickly. However, the existing spatial domain digital image information hiding technology generally has a problem-difficult to resist the mathematical statistical analysis. Because the information hiding in the spatial domain changes the normal distribution between pixels of the original image, it is easy to identify whether a digital image contains secret information by using the mathematical statistical analysis tool. The main reason for the development of information hiding technology is that its camouflage is not easy to be paid attention to by illegal elements. If it is easy to be attacked by mathematical statistical analysis tools, the significance of information hiding technology is not so important. Therefore, the two improved schemes introduced SPAM attack test. Finally, the experimental results show that the two improved schemes are more resistant to SPAM attacks, and the robustness is improved.
【學(xué)位授予單位】：安徽大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TP391.41;TP309
本文編號(hào)：2118836
[Abstract]:With the rapid development of Internet technology and multimedia information technology, computers have entered thousands of households. The Internet makes the forms of information exchange various and not restricted by space, making digital multimedia information more and more convenient on the Internet, which brings great convenience to people's work and life. However, the Internet is a double-edged sword, which brings convenience to people's work and life, but also brings hidden trouble of information security. The traditional information security protection measures are to encrypt the transmitted plaintext information through cryptography to form a pile of ciphertext information which can not be read directly, so as to achieve the purpose of not being directly obtained by illegal elements. At present, the new problems in network transmission give rise to the upsurge of the research on information hiding technology. The information hiding technology is different from the traditional cryptography technology. The traditional cryptography technology only makes the content of the information not recognized by the illegal receiver. The information hiding is to hide the confidential information to the general digital multimedia (video, image, audio). In documents and files, the media with secret information looks the same as other media without secret information, so it is not easy to be noticed and detected by illegal elements, and easy to escape the cracking and attack of illegal elements. This paper mainly focuses on the problems existing in image spatial domain information hiding technology. The main contents of this paper are as follows: (1) this paper firstly analyzes and summarizes the characteristics of various image information hiding techniques in spatial domain at home and abroad. Secondly, in order to further improve the robustness of the existing image information hiding technology, the capacity of the secret information and the quality of the secret image, we mainly do the following research: 1) in order to improve the volume of the secret information, This paper presents an image information hiding scheme based on modulo 3 strategy. The scheme can hide two ternary secret information by adding and subtracting the gray value of each pixel in the carrier image. The simulation results show that the proposed scheme improves both the volume and robustness of the carrier image. In order to improve the quality of the hidden image, the human visual system (HVS) is more sensitive to the smooth region of the image in order to improve the quality of the hidden image. An adaptive image information hiding scheme based on dynamic cardinality system (VRNS) is proposed. In this scheme, the secret information is segmented and transformed into a dynamic cardinal number system, and then the converted secret information is first stored in the complex region of the carrier image, so as to improve the visual quality of the hidden image. Finally, the simulation results show that this scheme not only achieves a better visual quality effect, but also improves the robustness. (2) Image information hiding technology has been developed very quickly. However, the existing spatial domain digital image information hiding technology generally has a problem-difficult to resist the mathematical statistical analysis. Because the information hiding in the spatial domain changes the normal distribution between pixels of the original image, it is easy to identify whether a digital image contains secret information by using the mathematical statistical analysis tool. The main reason for the development of information hiding technology is that its camouflage is not easy to be paid attention to by illegal elements. If it is easy to be attacked by mathematical statistical analysis tools, the significance of information hiding technology is not so important. Therefore, the two improved schemes introduced SPAM attack test. Finally, the experimental results show that the two improved schemes are more resistant to SPAM attacks, and the robustness is improved.
【學(xué)位授予單位】：安徽大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TP391.41;TP309
【參考文獻(xiàn)】
相關(guān)期刊論文 前2條
1 張偉建;;淺談數(shù)制與轉(zhuǎn)換[J];數(shù)字技術(shù)與應(yīng)用;2010年07期
2 劉峰,張鵬;信息隱藏技術(shù)及其應(yīng)用[J];天津通信技術(shù);2001年01期
，本文編號(hào)：2118836
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