【摘要】：隨著internet的發(fā)展，網(wǎng)絡(luò)技術(shù)的不斷誕生，網(wǎng)絡(luò)編碼技術(shù)自產(chǎn)生以來(lái)，由于網(wǎng)絡(luò)編碼的潛在優(yōu)點(diǎn)，，人們對(duì)它的研究越來(lái)越深，應(yīng)用的領(lǐng)域也越來(lái)越廣。而P2P以其分布性、自組織性等特點(diǎn)在互聯(lián)網(wǎng)上，特別是P2P文件下載的應(yīng)用已發(fā)展普及到整個(gè)網(wǎng)絡(luò)中。網(wǎng)絡(luò)編碼技術(shù)與P2P技術(shù)的結(jié)合應(yīng)用是當(dāng)前主要的研究任務(wù)之一，網(wǎng)絡(luò)編碼技術(shù)可以提高P2P網(wǎng)絡(luò)中的吞吐量，提高寬帶利用率，而且由于P2P網(wǎng)絡(luò)中節(jié)點(diǎn)的動(dòng)態(tài)性的特點(diǎn)，會(huì)出現(xiàn)文件下載中出現(xiàn)無(wú)法完整下載整個(gè)文件的情況。因此，本文在通過(guò)研究P2P技術(shù)和網(wǎng)絡(luò)編碼技術(shù)的基礎(chǔ)上，并分析了現(xiàn)有的基于網(wǎng)絡(luò)編碼的P2P文件下載系統(tǒng)中應(yīng)用中的網(wǎng)絡(luò)編碼技術(shù)，對(duì)應(yīng)用在P2P文件下載的網(wǎng)絡(luò)編碼技術(shù)提出了改進(jìn)，并為了增加P2P網(wǎng)絡(luò)中文件的安全性，增加了一個(gè)防竊聽網(wǎng)絡(luò)編碼模塊。本文的主要工作如下： 1、對(duì)現(xiàn)有的應(yīng)用于P2P文件下載系統(tǒng)的四種網(wǎng)絡(luò)編碼方法：無(wú)分代網(wǎng)絡(luò)編碼方法、分代網(wǎng)絡(luò)編碼方法、代間網(wǎng)絡(luò)編碼方法、分代交叉網(wǎng)絡(luò)編碼方法進(jìn)行了分析與研究，提出了它們的優(yōu)缺點(diǎn)。 2、在現(xiàn)有的網(wǎng)絡(luò)編碼方法的基礎(chǔ)上，提出了改進(jìn)的安全網(wǎng)絡(luò)編碼方法，改進(jìn)的安全網(wǎng)絡(luò)編碼方法由改進(jìn)的分代網(wǎng)絡(luò)編碼方法和防竊聽網(wǎng)絡(luò)編碼方法兩個(gè)模塊組成，兩個(gè)模塊算法同時(shí)進(jìn)行、協(xié)同工作。 3、通過(guò)對(duì)改進(jìn)的分代網(wǎng)絡(luò)編碼方法和防竊聽網(wǎng)絡(luò)方法進(jìn)行理論分析。改進(jìn)的分代網(wǎng)絡(luò)編碼方法實(shí)現(xiàn)了無(wú)分代、分代、代間、分代交叉網(wǎng)絡(luò)編碼方法在編碼時(shí)間和產(chǎn)生的文件信息的線性無(wú)關(guān)的編碼塊的數(shù)目上實(shí)現(xiàn)了共贏效果。防竊聽模塊通過(guò)產(chǎn)生混沌序列對(duì)原始文件信息進(jìn)行加密，采用的混沌映射比傳統(tǒng)的Logistic映射能更早的進(jìn)入混沌狀態(tài)，提高了文件信息在P2P下載系統(tǒng)中的安全性。 4、對(duì)改進(jìn)的分代網(wǎng)絡(luò)編碼方法和防竊聽網(wǎng)絡(luò)編碼方法進(jìn)行了仿真，符合理論上的分析。改進(jìn)的分代網(wǎng)絡(luò)編碼方法在編碼時(shí)間和產(chǎn)生的文件信息的線性無(wú)關(guān)的編碼塊的數(shù)目上實(shí)現(xiàn)了共贏效果。防竊聽網(wǎng)絡(luò)編碼模塊對(duì)原始文件信息進(jìn)行加密，實(shí)現(xiàn)了良好的防竊聽效果，增強(qiáng)了文件信息在P2P下載系統(tǒng)中的安全性。
[Abstract]:With the development of internet and the birth of network technology, since the emergence of network coding technology, because of the potential advantages of network coding, people study it more and more deeply, and the application field is more and more extensive. P2P, with its characteristics of distribution and self-organization, has been widely used in the whole network, especially in the application of P2P file download. The combination of network coding technology and P2P technology is one of the main research tasks at present. Network coding technology can improve the throughput and broadband utilization of P2P networks, and because of the dynamic characteristics of nodes in P2P networks. A file download will occur where the entire file cannot be fully downloaded. Therefore, based on the research of P2P technology and network coding technology, this paper analyzes the application of network coding technology in P2P file download system based on network coding. In order to increase the security of files in P2P network, an anti-eavesdropping network coding module is proposed. The main work of this paper is as follows: 1. There are four kinds of network coding methods used in P2P file download system: no generation network coding method, intergenerational network coding method. This paper analyzes and studies the methods of intergenerational network coding, and puts forward their advantages and disadvantages. 2. Based on the existing network coding methods, an improved secure network coding method is proposed. The improved secure network coding method consists of two modules: the improved generation network coding method and the anti-eavesdropping network coding method. The two module algorithms work together. 3. The improved generation network coding method and the anti-eavesdropping network method are analyzed theoretically. The improved intergenerational network coding method achieves a win-win result in terms of coding time and the number of linearly independent coding blocks of the generated file information in terms of the coding time and the number of linearly independent coding blocks generated by the intergenerational and intergenerational network coding methods. The anti-eavesdropping module encrypts the original file information by generating chaotic sequence, and the chaotic mapping can enter the chaotic state earlier than the traditional Logistic mapping, which improves the security of file information in P2P download system. 4. The improved generation network coding method and the anti-eavesdropping network coding method are simulated, which accord with the theoretical analysis. The improved network coding method achieves win-win results in terms of coding time and the number of linearly independent coding blocks of generated file information. The anti-eavesdropping network coding module encrypts the original file information, realizes good anti-eavesdropping effect, and enhances the security of file information in P2P download system.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TP393.02

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 陳靜怡;;信息論安全下的防竊聽網(wǎng)絡(luò)編碼研究[J];計(jì)算機(jī)光盤軟件與應(yīng)用;2013年18期

2 趙

本文編號(hào)：2402617