P2P下载系统中网络编码的研究
发布时间：2019-01-06 09:08
【摘要】：随着internet的发展，网络技术的不断诞生，网络编码技术自产生以来，由于网络编码的潜在优点，，人们对它的研究越来越深，应用的领域也越来越广。而P2P以其分布性、自组织性等特点在互联网上，特别是P2P文件下载的应用已发展普及到整个网络中。网络编码技术与P2P技术的结合应用是当前主要的研究任务之一，网络编码技术可以提高P2P网络中的吞吐量，提高宽带利用率，而且由于P2P网络中节点的动态性的特点，会出现文件下载中出现无法完整下载整个文件的情况。因此，本文在通过研究P2P技术和网络编码技术的基础上，并分析了现有的基于网络编码的P2P文件下载系统中应用中的网络编码技术，对应用在P2P文件下载的网络编码技术提出了改进，并为了增加P2P网络中文件的安全性，增加了一个防窃听网络编码模块。本文的主要工作如下： 1、对现有的应用于P2P文件下载系统的四种网络编码方法：无分代网络编码方法、分代网络编码方法、代间网络编码方法、分代交叉网络编码方法进行了分析与研究，提出了它们的优缺点。 2、在现有的网络编码方法的基础上，提出了改进的安全网络编码方法，改进的安全网络编码方法由改进的分代网络编码方法和防窃听网络编码方法两个模块组成，两个模块算法同时进行、协同工作。 3、通过对改进的分代网络编码方法和防窃听网络方法进行理论分析。改进的分代网络编码方法实现了无分代、分代、代间、分代交叉网络编码方法在编码时间和产生的文件信息的线性无关的编码块的数目上实现了共赢效果。防窃听模块通过产生混沌序列对原始文件信息进行加密，采用的混沌映射比传统的Logistic映射能更早的进入混沌状态，提高了文件信息在P2P下载系统中的安全性。 4、对改进的分代网络编码方法和防窃听网络编码方法进行了仿真，符合理论上的分析。改进的分代网络编码方法在编码时间和产生的文件信息的线性无关的编码块的数目上实现了共赢效果。防窃听网络编码模块对原始文件信息进行加密，实现了良好的防窃听效果，增强了文件信息在P2P下载系统中的安全性。
[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.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP393.02
[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.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP393.02
【参考文献】
相关期刊论文 前10条
1 陈静怡;;信息论安全下的防窃听网络编码研究[J];计算机光盘软件与应用;2013年18期
2 赵
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