本文選題：加密技術(shù) + 可逆信息隱藏�。� 參考：《暨南大學(xué)》2014年碩士論文

【摘要】：加密域可逆信息隱藏是一種能在加密后的多媒體數(shù)據(jù)中執(zhí)行可逆信息隱藏的技術(shù)，，其兼具加密技術(shù)與可逆信息隱藏的優(yōu)點(diǎn)，同時(shí)又有別于傳統(tǒng)的加密與可逆信息隱藏相結(jié)合的技術(shù)，其以優(yōu)越的性能在信息安全領(lǐng)域扮演著不可替代的作用。本文對(duì)加密域可逆信息隱藏進(jìn)行了研究。 首先，對(duì)加密域可逆信息隱藏的理論進(jìn)行了研究。描述了其研究背景、應(yīng)用領(lǐng)域、國(guó)內(nèi)外研究現(xiàn)狀；同時(shí)，由于加密域可逆信息隱藏是與加密技術(shù)和信息隱藏緊密相關(guān)聯(lián)的，因此本文還對(duì)加密技術(shù)、信息隱藏尤其是可逆信息隱藏的知識(shí)進(jìn)行了綜述，分析比較了幾種常用的算法。 其次，對(duì)加密域可逆信息隱藏的算法進(jìn)行了研究，算法的研究是以多媒體中具有代表性的數(shù)字圖像作為測(cè)試對(duì)象的。構(gòu)建了加密域可逆信息隱藏的一般模型；在對(duì)兩種經(jīng)典的加密域可逆信息隱藏算法的不足之處進(jìn)行分析的基礎(chǔ)上，提出了一種基于圖像塊分類的加密域可逆信息隱藏算法。算法通過原始圖像的高比特位的相關(guān)性對(duì)原始圖像塊進(jìn)行平滑度分類，以執(zhí)行不同數(shù)量的低比特位取反，從而達(dá)到有效減小數(shù)據(jù)提取和圖像恢復(fù)的錯(cuò)誤率的目的。實(shí)驗(yàn)結(jié)果表明，相對(duì)于之前的兩種經(jīng)典算法，新的算法在保證載體明文的安全性、解密圖像的峰值信噪比不變的情況下，實(shí)現(xiàn)了上述目標(biāo)，因此其具有更加優(yōu)越的性能。 最后，對(duì)本文提出的算法進(jìn)行了總結(jié)分析，描述了其在性能上可進(jìn)一步改進(jìn)的地方，指出了下一步研究工作的方向，并對(duì)加密域可逆信息隱藏的前景進(jìn)行了展望。
[Abstract]:Reversible information hiding in encryption domain is a kind of reversible information hiding technology which can be implemented in encrypted multimedia data. It has the advantages of both encryption and reversible information hiding. At the same time, different from the traditional encryption and reversible information hiding technology, its superior performance in the field of information security plays an irreplaceable role. In this paper, reversible information hiding in encryption domain is studied. Firstly, the theory of reversible information hiding in encryption domain is studied. At the same time, because the reversible information hiding in the encryption domain is closely related to the encryption technology and information hiding, this paper also discusses the encryption technology. The knowledge of information hiding, especially reversible information hiding, is reviewed, and several common algorithms are analyzed and compared. Secondly, the reversible information hiding algorithm in encryption domain is studied. The representative digital image in multimedia is used as the test object. A general model of reversible information hiding in encryption domain is constructed, and a reversible information hiding algorithm in encryption domain based on image block classification is proposed based on the analysis of the shortcomings of two classical reversible information hiding algorithms in encryption domain. The algorithm classifies the original image block smoothness by the correlation of high bit bits of the original image, in order to carry out different numbers of low bit bits inversion, so as to effectively reduce the error rate of data extraction and image recovery. The experimental results show that compared with the previous two classical algorithms, the new algorithm achieves the above objectives under the condition of guaranteeing the security of the carrier plaintext and keeping the peak signal-to-noise ratio of the decrypted image unchanged, so it has more superior performance. Finally, this paper summarizes and analyzes the proposed algorithm, describes the performance of the algorithm can be further improved, points out the direction of the next research work, and prospects for reversible information hiding in encryption domain.
【學(xué)位授予單位】：暨南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN918.4

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