本文選題：云安全 + 圖像置亂��； 參考：《遼寧大學》2014年碩士論文

【摘要】：云存儲作為云計算的衍生服務，為用戶提供存儲備份和管理文件的功能，云存儲不但存取靈活，可擴展性強，而且按需收費甚至是免費的形式更加快了人們的廣泛使用。隨著越來越多的用戶選擇將信息存儲到云端，面向云存儲的安全問題成為研究的熱點。 圖像作為一種典型的個人信息，在傳輸?shù)倪^程中可能受到監(jiān)聽、竊取、剪切攻擊、污染攻擊、涂畫攻擊、標識攻擊等；在存儲端可能會受到非法訪問、篡改等，這些都會造成潛在的安全問題。為了解決圖像在整個云存儲過程中的安全問題，本文主要做了以下工作： 首先，提出基于Eucalyptus的圖像信息安全的云安全框架。以云存儲的傳統(tǒng)四層框架為基礎，重點先在傳輸過程加入圖像置亂系統(tǒng)，，提高圖像的隱私性，有效掩蓋圖像真實信息，防止他人竊取。然后在存儲過程采用信息擴散算法（IDA）進行分布式存儲管理，該算法占用存儲空間小，適合大數(shù)據(jù)量的云環(huán)境，進一步保證圖像在存儲時的抗攻擊性。 其次，在云安全框架的基礎上，針對傳輸過程中圖像這種信息形式，提出基于分塊置亂的圖像容錯算法。首先考慮到傳輸時效性，采用分塊置亂方式，簡便快捷，提高圖像隱私性。同時為了提高圖像的容錯能力，采用二次剩余定理和Rabin密碼體系相結合的方法，能夠在圖像受攻擊后最大限度進行恢復，有效提高圖像傳輸過程的抗攻擊性和魯棒性。 最后，通過仿真實驗，驗證了本文算法的置亂效果。并通過模擬剪切攻擊、污染攻擊、涂畫攻擊、標識攻擊實驗，得到了恢復圖像的效果以及抗不同攻擊強度的對比數(shù)據(jù)，結果表明本文算法能夠有效抵抗一定強度的攻擊，加密時間花費較少，適合網(wǎng)絡傳輸?shù)脑拼鎯Νh(huán)境。
[Abstract]:As a derivative service of cloud computing, cloud storage provides the function of storing and managing files for users. Cloud storage is not only flexible and extensible, but also is widely used in the form of charge and even free form. As more and more users choose to store information to cloud, security for cloud storage The problem has become a hot spot of research.
As a typical personal information, image may be monitored, stolen, cut attack, pollution attack, painting attack, identification attack, etc. in the process of transmission, and may be illegally accessed and tampered in the storage side, which can cause potential security problems. The main work of this article is as follows:
First, a cloud security framework based on Eucalyptus image information security is proposed. Based on the traditional four layer framework of cloud storage, the image scrambling system is added to the transmission process to improve the privacy of the image, effectively cover the true information of the image and prevent the theft of others. Then, the information diffusion algorithm (IDA) is used in the storage process to distribute the information. This algorithm takes up small storage space and is suitable for large data cloud environment, and further ensures the image's attack resistance during storage.
Secondly, on the basis of the cloud security framework, the image fault tolerance algorithm based on block scrambling is proposed in view of the information form in the transmission process. First, considering the timeliness of transmission, a block scrambling method is adopted to improve the privacy of the image. In order to improve the fault tolerance of the image, the two remainder theorem and the Rabin password are adopted. The method of combining the system can restore the image to the maximum extent after being attacked, and effectively enhance the attack and robustness of the image transmission process.
Finally, through the simulation experiment, the scrambling effect of the algorithm is verified. The results of the simulated shear attack, the pollution attack, the painting attack and the identification attack experiment are obtained. The results of the restoration of the image and the contrast data against the different attack intensity are obtained. The results show that the algorithm can effectively resist the attack of a certain intensity, and the time of encryption is less expensive. A cloud storage environment suitable for network transmission.
【學位授予單位】：遼寧大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TP333;TP309

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本文編號：2030529