本文選題：符號(hào)動(dòng)力系統(tǒng) + 混沌加密　； 參考：《深圳大學(xué)》2017年碩士論文

【摘要】：隨著信息技術(shù)與計(jì)算機(jī)技術(shù)的高速發(fā)展,人們對(duì)高清數(shù)字視頻信息的需求越來(lái)越廣泛,而視頻高清化的廣泛需要也逐步提高了人們對(duì)視頻壓縮性能的要求。為此,在2010年4月,由VCEG和MPEG再次組建的視頻編碼聯(lián)合組(JCT-VC)制定了新一代視頻壓縮標(biāo)準(zhǔn)(H.265)。不過(guò),H.265標(biāo)準(zhǔn)并未考慮如何防止視頻數(shù)據(jù)遭人竊取、惡意破壞和篡改等問(wèn)題,因而研究一套適合這種新標(biāo)準(zhǔn)H.265的視頻加密算法的問(wèn)題就突顯出來(lái)了。本文所研究的課題部分得到了深圳市學(xué)科布局項(xiàng)目“基于光編碼物理層安全的光通信關(guān)鍵技術(shù)研究”(JCYJ20160328145357990)的資助,是以H.265標(biāo)準(zhǔn)的加密算法為研究重點(diǎn),結(jié)合混沌序列密碼和H.265壓縮標(biāo)準(zhǔn)的特點(diǎn),設(shè)計(jì)了一種新的基于混沌序列密碼的視頻加密方案。該方案首先利用時(shí)變符號(hào)動(dòng)力系統(tǒng)設(shè)計(jì)了偽隨機(jī)性能良好的混沌序列,之后在改進(jìn)熵編碼中原有算術(shù)編碼方案后,利用混沌偽隨機(jī)序列和改進(jìn)的算術(shù)編碼設(shè)計(jì)了一種適合H.265特性的視頻加密方案,最后通過(guò)理論分析和仿真說(shuō)明了該視頻加密算法的良好效果�？傮w來(lái)說(shuō),本文工作的創(chuàng)新點(diǎn)包括:1)在理論上嚴(yán)格證明了一種時(shí)變廣義符號(hào)動(dòng)力系統(tǒng)的混沌性,并結(jié)合寄存器序列與混沌序列,提出了偽隨機(jī)序列的一種新的產(chǎn)生方法,之后利用單比特頻數(shù)檢測(cè)、撲克檢測(cè)以及自相關(guān)檢測(cè)等常見(jiàn)偽隨機(jī)性檢測(cè)方法對(duì)所產(chǎn)生的序列進(jìn)行性能檢測(cè),最后利用仿真實(shí)驗(yàn)驗(yàn)證了該序列的隨機(jī)性能優(yōu)良。這為混沌序列密碼中關(guān)鍵的密鑰流序列的設(shè)計(jì)打下了基礎(chǔ)。2)利用新的時(shí)變符號(hào)混沌系統(tǒng),設(shè)計(jì)一種新的混沌序列加密算法,將其應(yīng)用于數(shù)字圖像加密中,通過(guò)仿真實(shí)驗(yàn)檢驗(yàn)了良好的加密效果,并說(shuō)明了該圖像加密算法的密鑰空間大、密鑰敏感性強(qiáng)、抗統(tǒng)計(jì)攻擊性好等優(yōu)點(diǎn)。3)基于新標(biāo)準(zhǔn)H.265中原有算術(shù)編碼的特點(diǎn),提出了一種算術(shù)編碼的改進(jìn)方案,并結(jié)合新的時(shí)變符號(hào)混沌系統(tǒng)設(shè)計(jì)了一種新的視頻加密方案,之后通過(guò)理論分析了該方案的合理性,最后利用HM15.0仿真平臺(tái)驗(yàn)證了該方案具有良好的加密效果,并說(shuō)明了該視頻加密算法的壓縮效率高、壓縮比和視頻數(shù)據(jù)格式不變等優(yōu)點(diǎn)。
[Abstract]:With the rapid development of information technology and computer technology, the demand for high definition digital video information is becoming more and more widespread, and the wide demand for video high-definition has gradually improved the demand for video compression performance. In April 2010, the video coding joint group (JCT-VC), which was set up by VCEG and MPEG, made a new generation of video. Frequency compression standard (H.265). However, the H.265 standard does not consider how to prevent video data from being stolen, malicious destruction and tampering. Therefore, the study of a set of video encryption algorithms suitable for this new standard H.265 is highlighted. The subject of this paper has been studied in the Shenzhen discipline layout project based on optical coding. The research on the key technology of physical layer safety of optical communication (JCYJ20160328145357990) is to design a new video encryption scheme based on chaotic sequence cipher based on the characteristics of H.265 standard encryption algorithm, combining the characteristics of chaotic sequence cipher and H.265 compression standard. The scheme first uses time-varying symbol power system. After calculating the chaotic sequence with good pseudo random performance, after improving the entropy coding, a video encryption scheme suitable for H.265 characteristics is designed by using chaotic pseudo random sequence and improved arithmetic coding. Finally, the good effect of the video encryption algorithm is illustrated by theoretical analysis and simulation. The innovative points of the work include: 1) in theory, the chaos of a time-varying generalized symbolic power system is strictly proved, and a new generation method of pseudo random sequence is proposed in combination with the register sequence and the chaotic sequence. After that, the common pseudo random detection methods, such as single bit frequency detection, poker test and autocorrelation detection, are used. The performance of the sequence is tested. Finally, the simulation experiment shows that the sequence has good random performance. This is the basic.2 for the design of key key stream sequence in chaotic sequence cipher. A new chaotic sequence encryption algorithm is designed and applied to digital image encryption by using the new time-varying symbolic chaotic system. The good encryption effect is tested by the simulation experiment, and it shows that the key space of the image encryption algorithm is large, the key sensitivity is strong and the anti statistical attack is good.3.) based on the new standard H.265 has the characteristics of arithmetic coding in the central plain, an improved case of arithmetic coding is put forward, and a new time-varying symbol chaotic system is designed. The new video encryption scheme is introduced, and the rationality of the scheme is analyzed through the theory. Finally, the HM15.0 simulation platform is used to verify the good encryption effect of the scheme, and the high compression efficiency of the video encryption algorithm, the compression ratio and the invariant video data format are also illustrated.
【學(xué)位授予單位】：深圳大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN919.81;TP309.7

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 田傳俊;陳關(guān)榮;;時(shí)變離散時(shí)空系統(tǒng)的混沌性[J];深圳大學(xué)學(xué)報(bào)(理工版);2013年05期

2 宋艷紅;亢保元;;數(shù)論在密碼學(xué)中的應(yīng)用[J];神州;2012年24期

3 唐峰;蔡勉;閆磊;李燕;;一種基于FMO置亂的視頻加密算法研究[J];通信技術(shù);2009年10期

4 田傳俊;陳關(guān)榮;;廣義符號(hào)動(dòng)力系統(tǒng)的混沌性[J];應(yīng)用數(shù)學(xué)學(xué)報(bào);2008年03期

5 郜社榮;趙東風(fēng);丁洪偉;;基于混沌序列的視頻流部分加密[J];云南大學(xué)學(xué)報(bào)(自然科學(xué)版);2006年03期

6 姚曄,徐正全,楊志云;基于偽隨機(jī)序列的宏塊置亂視頻加密方案[J];計(jì)算機(jī)工程;2005年20期

7 高飛,李興華;基于混沌序列的位圖像加密研究[J];北京理工大學(xué)學(xué)報(bào);2005年05期

8 商艷紅,李南,鄒建成;Fibonacci變換及其在數(shù)字圖像水印中的應(yīng)用[J];中山大學(xué)學(xué)報(bào)(自然科學(xué)版);2004年S2期

9 陳道敏,周金泉;加密技術(shù)在流媒體安全傳輸中的應(yīng)用[J];網(wǎng)絡(luò)安全技術(shù)與應(yīng)用;2004年11期

10 廉士國(guó),孫金生,王執(zhí)銓;視頻加密算法及其發(fā)展現(xiàn)狀[J];信息與控制;2004年05期

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