本文選題：網(wǎng)絡(luò)硬盤存儲系統(tǒng) + 安全模塊　； 參考：《遼寧師范大學(xué)》2013年碩士論文

【摘要】：隨著越來越多的網(wǎng)絡(luò)硬盤系統(tǒng)涌入市場，向用戶提供不斷增長且價格低廉的存儲空間，使得網(wǎng)絡(luò)硬盤系統(tǒng)逐漸變得流行起來。但是大多數(shù)網(wǎng)盤在系統(tǒng)的安全性方面存在缺陷，甚至其中一些沒有對用戶所擁有的數(shù)據(jù)進(jìn)行加密。在這類系統(tǒng)中，網(wǎng)絡(luò)硬盤提供商對用戶數(shù)據(jù)擁有控制權(quán)和訪問權(quán)，使得用戶失去了對數(shù)據(jù)的絕對控制能力，從而引發(fā)了一系列的安全威脅，例如數(shù)據(jù)被竊取，數(shù)據(jù)被篡改等，這些威脅在一定程度上阻礙了網(wǎng)絡(luò)硬盤的發(fā)展。為了解決此問題，我們提出了一種安全模塊：加載此模塊的網(wǎng)絡(luò)硬盤系統(tǒng)可以為用戶提供數(shù)據(jù)私密性、數(shù)據(jù)完整性和訪問控制權(quán)限等功能。為了保證網(wǎng)盤系統(tǒng)的獨(dú)立性，我們采用松耦合的設(shè)計，使得網(wǎng)盤系統(tǒng)只需做很少量的改動，就能夠?qū)⒈景踩K嵌入到原有系統(tǒng)中，在原有功能的基礎(chǔ)上提供以上安全功能保護(hù)。在安全模塊中我們還使用了高效的密鑰管理方法、數(shù)據(jù)自加密和懶惰撤銷技術(shù)。在安全元數(shù)據(jù)服務(wù)器中我們使用了緩存技術(shù)以此來提高系統(tǒng)效率。為了加強(qiáng)網(wǎng)盤系統(tǒng)的權(quán)威性，還引入了獨(dú)立的認(rèn)證中心。實(shí)驗結(jié)果表明，網(wǎng)盤系統(tǒng)的性能并沒有因為加載了安全模塊而明顯地下降，，其整體性能仍在用戶能夠接受的范圍。安全元數(shù)據(jù)服務(wù)器可以輕松的處理大量用戶同時在線時所發(fā)出的請求。并且為了應(yīng)對未來可能出現(xiàn)用戶數(shù)量激增的可能，我們還對元數(shù)據(jù)服務(wù)器做了可擴(kuò)展性設(shè)計。 在通常情況下，網(wǎng)盤系統(tǒng)會向用戶提供高可用性和低延遲的網(wǎng)絡(luò)服務(wù)。并且通過對不同程度上的一致性進(jìn)行選取，從而尋找可用性、低延遲與一致性這三者的平衡。高一致性意味著系統(tǒng)將會犧牲掉一定的可用性，但低一致性會增加程序設(shè)計的難度。本文將為一款網(wǎng)絡(luò)硬盤系統(tǒng)設(shè)計一種一致性協(xié)議，使得該網(wǎng)盤可以高效的處理用戶對共享目錄或文件的移動、刪除和重命名等操作，與此同時還會確保共享目錄及文件在各個客戶端中不會有混亂無序的情況出現(xiàn)。
[Abstract]:With more and more network hard disk systems pouring into the market and providing increasing and low cost storage space to users, the network hard disk system is becoming popular. However, most SkyDrive has defects in the security of the system, and some of them do not encrypt the data owned by users. On the other hand, the network hard disk provider has the control and access to the user data, which makes the user lose the absolute control of the data, thus triggering a series of security threats, such as the data being stolen, the data being tampered with. These threats have hindered the development of the network hard disk to a certain extent. In order to solve this problem, we have proposed A security module: the network hard disk system loaded with this module can provide users with data privacy, data integrity and access control rights. In order to ensure the independence of the SkyDrive system, we use a loosely coupled design so that the SkyDrive system can be embedded in the original system with only a small amount of changes. In the system, the above security function is provided on the basis of the original function. In the security module, we also use efficient key management methods, data self encryption and lazy revocation technology. In the security metadata server, we use caching to improve the system efficiency. In order to strengthen the authority of the SkyDrive system, it is also introduced. The experimental results show that the performance of the SkyDrive system is not significantly reduced by loading a security module, and the overall performance is still acceptable to the user. The security metadata server can easily handle requests made by a large number of users at the same time on the line. And in response to the future possible use of the security metadata server. The possibility of a surge in household numbers has also made scalable design for metadata servers.
In general, the SkyDrive system will provide users with high availability and low latency network services. And by selecting the consistency of different degrees to find the balance between the three parties, such as availability, low latency and consistency. High consistency means that the system will sacrifice certain availability, but low consistency will increase the program. The design is difficult. This article will design a conformance protocol for a network hard disk system that enables the SkyDrive to efficiently handle the user's movement, deletions and renaming of shared directories or files, while also ensuring that the shared directory and files are not chaotic and unordered in each client.

【學(xué)位授予單位】：遼寧師范大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TP333.35;TP309

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