Design And Implementation Of P2P Secure Communication System Based On Peer Group

The study of peer-to-peer(P2P) technology is a hot topic in recent years that has widespread applications, very broad prospects for future development. However, the P2P technology in the course of development, produced a series of urgent problems need to solve. In these problems, secure communication is an important issue. Because of the P2P networks structural characteristics, solving the secure communications problems is very complicated. Nodes need to establish identity of the other communications, establish secret communication channel and transmit secret information to other side securely and integrally in a non-line authentication, dynamic, decentralized network environment. Current mature technology to solve P2P secure communication is JXTA, but it lacks universality and flexibility for particular P2P applications.This thesis'subject is to solve the secure communication issue of cooperative computing in hybrid P2P network based on .NET platform. The increasing complexity of hybrid P2P network structure increases the difficulty to solve secure communication issues, such as: access control issue, authentication and how to establish secure communication channels etc. After analyzed and explored the characteristics of hybrid P2P network, the theory of secure peer group and traditional network security technology, this thesis presents the master plan of building a secure communication system for hybrid P2P network based on peer group, that is: By authorization mechanism based on digital certificate, constructing the authorized nodes into a secure peer group, using digital certificate to support the identity authentication of peer nodes, using cryptographic communication by symmetric keys and data integrity verification methods to ensure peer nodes secure communication. This thesis explores the realization of constructing secure communication system in hybrid P2P network and presents the methods which based on peer group to realize authorization, authentication, cryptographic communication mechanisms on .NET platform.